Thermally conductive magnesium alloy and preparation method thereof

The invention relates to a thermally conductive magnesium alloy, which comprises the following components by weight percent: 1-6.5% by weight of Zn, 0.2-2.5% by weight of Si and the balance of Mg. The preparation method comprises the following steps of taking pure magnesium ingot, pure Zn ingot, pure Si granules or Mg-Si intermediate alloy as raw materials, melting the pure magnesium ingot, adding alloy elements of Zn and Si, and alloying; preparing a cast, and carrying out solid solution treatment and time effect treatment; or preparing a billet, carrying out homogenization heat treatment, adopting rolling, extrusion, drawing or forging technology for carrying out deformation processing to prepare plates, pipes, profiles, rods, wires or a variety of forged parts, and carrying out the time effect treatment and pre-stretching treatment. The thermal conductivity of the magnesium alloy under the condition of 20 DEG C is greater than 120W.(m.K)-1, the tensile strength is 265-380Mpa, and the ...

Multilevel waste heat quenching system

The invention relates to a multilevel waste heat quenching system, in particular to an online multilevel waste heat quenching system capable of weakening the quenching residual stress of an extruded profile, which belongs to the field of the high-temperature deformation heat treatment of metal. The multilevel waste heat quenching system comprises a guide passage which is arranged in front of an outlet of an extruder and has a spraying function, wherein the guide passage sequentially consists of an air injection guide passage and a water injection guide passage or sequentially consists of an air injection guide passage, a mist spraying guide passage and a water injection guide passage. On the basis that the time effectiveness enhancing effect is guaranteed, the quenching residual stress of the extruded profile is weakened, the core fracturing is avoided, the prestretching difficulty is alleviated, and the stability in shape and size of a final product can be realized.

Heat conductive magnesium alloy and method for preparing same

The invention relates to a heat-conductive magnesium alloy and a preparation method thereof. The heat-conductive magnesium alloy comprises the component contents of: 1.5-10wt percent of Ag, 0.15-2.0 wt percent of Zr, 0.3-3.5wt percent of Ce, 0-1.5wt percent of Nd, 0-2.5wt percent of La, 0-0.5wt percent of Pr, wherein each content of Nd, La and Pr can not be zero at the same time or each content of Nd, La and Pr is zero at the same time and the rest component is Mg. Pure Mg ingot, pure Ag ingot or master alloy of Mg-Ag, master alloy of Mg-Zr, pure Ce ingot or rich-cerium mischmetal ingot or Ce or master alloy of rich-cerium mischmetal ingot and magnesium are used as raw materials; pure Mg ingot is smelted and alloyed; after castings are made, solid dissolving treatment and aging treatment are the next steps; or after making billet, homogenization thermal treatment and aging treatment are the next steps. The magnesium alloy of the invention, at the temperature of 20 DEG C, has thermal conductivity ...

Snowmobile sleigh track transformation system

The invention relates to the technical field of building structures, in particular to a snowmobile sleigh track transformation system oriented to public experience and entertainment. The snowmobile sleigh racing track transformation system comprises a transformation track which is erected on a concrete layer of a snowmobile sleigh standard racing track; the snowmobile sled vehicle body comprises a vehicle body, a guiding system and a braking system, wherein the guiding system and the braking system are arranged on the vehicle body and connected with the transformed rail in a matched mode. The method can effectively solve the problem of insufficient function expansion and utilization of the standard racing track of the snowmobile and the sleigh after racing, meets the requirement of the national racing track of the snowmobile and the sleigh center for public open experience, solves the problem that the operation and maintenance cost is too high after racing in a venue, and solves the problem ...

Creep resistance magnesium alloy and preparation method thereof

A kind of alloy, which is anti-squirming, and the components of it and the weight percent of them is: 1.5-10%Y, 0.15-2.0%Zr, 0.3-2.0%Nd, 2.5-8%Gd, and one kind or several kinds of components among Sm, Dy, Tb, Ho, Er, Tm and Eu is also contained, the other is Mg. the following steps are contained in the method: (1) To prepare material (2) To improve the temperature of warm-up stove and melting stove (3) To warm up the material (4) To melt the purified magnesium ingots in batches (5) To melt the other materials, which has been warmed up, in the Mg solution. (6) To distribute equably the alloy components in the Mg solution. (7) To make into casting ingot, cast, billet, board material, pipe material, model material, stick material, line material and all kinds of forged piece. The Mg alloy can fulfill the need owing a higher mechanics performance and anti-squirming performance under high temperate, and the anti-causticity performance is higher than the Mg in existence.

High-zinc deformation magnesium alloy and preparation and processing method thereof

The invention relates to a high-zinc deformation magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 8-12% of Zn, 0.5-1.5% of Ca, 0.5-1.0% of MM and the balance of Mg, wherein MM represents Ce-rich mixed rare earth and comprises the following components in parts by mass: 48 parts of Ce, 30 parts of La, 18 parts of Nd, 3 parts of Pr and about 1% of impurities which are Fe and Mn mainly. The preparation method of the magnesium alloy comprises the steps of smelting of the alloy, semi-solid extraction, homogenization treatment, re-deformation and aging deformation heat treatment. The Mg-Zn-Ca-MM alloy provided by the invention has better room-temperature mechanical property, and the mechanical property of the alloy after solid solution and aging can achieve 400-460MPa; meanwhile, the elongation rate of the alloy can achieve 7%-10%; and in addition, the alloy has certain high temperature resistance, and the breaking ...

Method for preparing 3,2',6'-tri-N-acetyl gentamicin C1a

The invention discloses a method for preparing 3,2',6'-tri-N-acetyl gentamicin C1a, which comprises the following steps of: (1) performing coordination reaction on gentamicin C1a and zinc acetate in a methanol solvent at the temperature of between 15 and 25 DEG C to prepare a gentamicin C1a-Zn complex; (2) reducing the temperature of the system of the step (1) to between 0 and 10 DEG C, dropwise adding mixed liquid consisting of acetic anhydride, triethylamine and tetrahydrofuran with stirring for acylation reaction to prepare 3,2',6'-tri-N-acetyl gentamicin C1a-Zn complex, after dropwise adding, continuously stirring and reacting for 1 to 2 hours, and adding water and distilling under reduce pressure to prepare concentrated solution containing the 3,2',6'-tri-N-acetyl gentamicin C1a-Zn complex; and (3) performing after treatment on the concentrated solution prepared by the step (2) to prepare a 3,2',6'-tri-N-acetyl gentamicin C1a finished product. The method has the advantage of higher ...

High-strength heat-resistant magnesium alloy and smelting method thereof

The present invention relates to a high-strength heat-resistant magnesium alloy. Its composition contains (by wt%) 8-16% of Y, 2-4.5% of Nd, and the rest is Mg. Besides, said invention also provides its preparation method and concrete operation steps.

Low cost heat resisting magnesium alloy and method for producing the same

Heat conductive magnesium alloy and method for preparing same

The invention relates to a heat-conductive magnesium alloy and a preparation method thereof, the heat-conductive magnesium comprises the component contents of: 1.5-11wt percent of Zn, 0.5-5wt percent of Cu, 0.15-1wt percent of Mn, 0.1-2.5wt percent of Ag, the rest component is Mg. Pure Mg ingot, pure Zn ingot, electrolytic copper and electrolytic manganese or master alloy Cu-Mn are used as raw materials and pure Mg ingot is smelted and alloyed; after castings are made, then solid dissolving treatment and aging treatment are performed; or after making billet, homogenization thermal treatment is the next step; sheet metal, tube, profile, rod, wire or other casting are made by adopting the technologies of rolling, extrusion, drawing, forging or distortion process, then the aging treatment is carried out. The magnesium alloy of the invention, at the temperature of 20 DEG C, has thermal conductivity rate of above 120W. (m.K)-1, tensile strength of above 340 Mpa and yielding strength of above ...

Low voltage reactive compensation combination switch device

The invention discloses a low voltage reactive compensation combination switch device. The low voltage reactive compensation combination switch device comprises a silicon controlled rectifier and an alternating current contactor, wherein a main circuit of the silicon controlled rectifier and a primary contact of the alternating current contactor are connected in parallel, the silicon controlled rectifier is a double direction controllable silicon inverse parallel module, and the alternating current contactor is a switched capacitor contactor with a series current limiting resistance structure. By adopting the above structure, the low voltage reactive compensation combination switch device has the advantages that a transient state switch and a steady state switch are independent of each other, anti-disturbance performance of a system is improved, an independent control unit has universality and can be used cooperatively with different capacities of the alternating current contactors according ...

Preparation method of 1-N-ethyl gentamicin Cla

The invention discloses a preparation method of 1-N-ethyl gentamicin Cla, which comprises the following steps of: reacting 3,2',6'-tri-N-acetyl gentamicin Cla with hexamethyldisilazane in a trichloromethane solvent under the catalysis of concentrated sulfuric acid to generate 3,2',6'-tri-N-acetyl-5,2'',4''-tri(trimethylsilyl) gentamicin Cla; carrying out N-alkylation reaction on the 3,2',6'-tri-N-acetyl-5,2'',4''-tri(trimethylsilyl) gentamicin Cla and acetaldehyde in a dichloromethane solvent at a temperature of 8-12 DEG C; carrying out reduction reaction with potassium borohydride; then hydrolyzing with an NaOH solution to obtain hydrolyzate of the 1-N-ethyl gentamicin Cla; and post-processing the hydrolyzate to obtain a finished product of the 1-N-ethyl gentamicin Cla. The method has the advantage of higher yield of the1-N-ethyl gentamicin Cla.

Molten metal magnesium solution or molten magnesium alloy solution filtering material and filter

The invention provides a molten metal magnesium solution or molten magnesium alloy solution filtering material and a filter. The filtering material is composed of magnesia ceramic particles and/or calcium oxide ceramic particles, and the diameter of the particles is within 1 to 50mm. The filter is as follows: the magnesia ceramic particles and/or the calcium oxide ceramic particles are uniformly filled in a container made of high-chrome steel or low-carbon steel, the diameter of the particles is within 1 to 50mm, the container is respectively provided with an inlet and an outlet, and baffles used for covering the inlet and the outlet are respectively arranged at the positions of the inlet and the outlet. The filter is arranged on a conveying pipeline in equipment for preparing metal magnesium or magnesium alloy, or is arranged on a delivery pump inlet or a pouring outlet in smelting equipment for preparing metal magnesium or magnesium alloy. The filter can exert the functions of absorbing ...

Metal magnesium melt or magnesium alloy melt filtering machine and filter

The invention relates to a metal magnesium melt or magnesium alloy melt filtering machine and a filter. The filtering material is one or several of chip, flocculation and screen of at least one of the following metals and alloys; the metal is chromium, manganese, niobium or tantalum; the alloy is either an alloy composed of more than two of chromium alloy, manganese, niobium and tantalum, or high chromium steel. A filter for metal magnesium melt or magnesium alloy melt is filled with the filtering material in a container made from high chromium steel or low carbon steel; the container is respectively provided with an inlet and an outlet; moreover, the inlet and outlet are respectively provided with a baffle plate for covering the inlet and outlet; the baffle plate is made of any one of porous high chromium steel plate, porous low carbon steel plate, high chromium steel wire mesh and low carbon steel wire mesh; and the individual apertures of porous high chromium steel plate and porous low ...

Straightening method for magnesium alloy rectangular section bar stock

A straightening method for a magnesium alloy rectangular section bar stock includes the following steps: (1) determining whether the magnesium alloy rectangular section bar stock has rectifiability; (2) calculating the maximum camber delta max of the magnesium alloy rectangular section bar stock; (3) conducting camber rating on the magnesium alloy rectangular section bar stock with a camber feeler gauge, and straightening the magnesium alloy rectangular bar stock if the camber of the magnesium alloy rectangular section bar stock is smaller than delta max; (4) determining a rolling reduction delta H; and (5) flattening the magnesium alloy rectangular section bar stock, and then continuing to press to generate a small amount of plastic deformation delta H in the thickness direction, and removing the pressure, so as to realize straightening of the magnesium alloy rectangular bar stock and reduce residual stress. The straightening method can quickly and effectively reduce the residual stress ...

Creep resistance magnesium alloy and preparation method thereof

Microscale Al-containing rare earth wrought magnesium alloy and preparation method thereof

The invention relates to a microscale Al-containing rare earth wrought magnesium alloy and its preparation method and belongs to the scope of industrial magnesium alloy. The magnesium alloy comprises, by weight, 6.5-15.0% of Gd, 3.0-5.5% of Y, 2.0-4.0% of Zn, 0.3-1.5% of Nd, 0.3-0.9% of Zr, 0.4-1.0% of Al and the balance of Mg. The preparation method of the magnesium alloy comprises the steps as follows: raw material preparation, alloy melting, alloy semi-solid extrusion, homogenization treatment, redeformation, cooling and pre-stretching treatment, ageing strengthening treatment and the like. By fully utilizing the defect that Al is preferentially combined with rare earth and Zr in alloy to form a stable phase, Zn element is added to make up insufficiencies and the wrought magnesium alloy with high performance is prepared. The recovery effect of rare earth elements is enhanced, and semi-solid forming and solid plastic forming are combined.

Side sunshade for snowmobile sleigh racing track and snowmobile sleigh building system

The invention relates to a side sunshade for a snowmobile and sleigh racing track and a snowmobile and sleigh building system.The side sunshade for the snowmobile and sleigh racing track comprises a sunshade body arranged above the snowmobile and sleigh racing track and used for shielding the snowmobile and sleigh racing track; the sunshade body is erected on the sunshade fixing frame, and the sunshade fixing frame is connected with the other snowmobile sleigh racing track above the shaded snowmobile sleigh racing track; the sunshade fixing frame is fixed to the side portion of the snowmobile sleigh racing track. The side sunshade is fixedly mounted on the side of the sleigh racing track, so that an existing sunshade body mounted at the top of the sleigh racing track is replaced, and the problem that the sunshade for the snowmobile sleigh racing track cannot be erected between two snowmobile sleigh racing tracks at the special landform or the large-angle turning position of the snowmobile ...

Securities information display method, apparatus, and system

Implementation manners of the present disclosure put forward a securities information display method, apparatus, and system. The method includes: generating a securities information display interface, where the securities information display interface displays a display bitmap of a security; determining whether the securities information display interface receives a screen sliding event, where the screen sliding event is an event generated by sliding the securities information display interface; obtaining securities data of a security corresponding to the screen sliding event when the screen sliding event is received; and updating the display bitmap based on the obtained securities data.

Creep resistant magnesium alloy containing Si and C, and method for producing the same

Fabricated double-plate shear wall, fabricated house and construction method of fabricated house

The invention relates to the technical field of building construction, in particular to an assembly type double-plate shear wall, an assembly type house and a construction method of the assembly type house. The assembly type double-plate shear wall comprises a prefabricated assembly component, a shear wall body and a shear wall body, and the prefabricated assembly component is of a plate-shaped structure; the two oppositely-arranged prefabricated assembly components of the same shape are spliced to form the assembly type double-plate shear wall with a cavity. And the compression-resistant connecting pieces penetrate through the surfaces of the two prefabricated assembly components which are oppositely arranged, and the compression-resistant connecting pieces are fixedly connected with the two prefabricated assembly components which form the assembly type double-plate shear wall correspondingly. By means of the compression-resistant connecting piece, the problem that in the prior art, the ...

Arbekacin synthesis method

The present invention relates to an arbekacin synthesis method. According to the arbekacin synthesis method, di-tert-butyl dicarbonate is adopted as a protection agent, tert-butyloxycarbonyl protection is performed on three amino groups on the sites C3, C2' and C6' of 3',4'-dideoxy-3',4' didehydro-kanamycin B, difference between the remaining free amino groups on the site 1 and the site 3' is adopted to directly and selectively introduce the side chain on the amino group on the site 1, the amino-protected 1-tert-butoxy amide-3-hydroxybutyric acid is directly adopted as an acylation reagent of the amino group on the site 1, and hydrolysis with an acid is adopted to remove the tert-butyloxycarbonyl protection. According to the present invention, the operations of the method are simple, the reaction condition and the protection group removing condition are mild, the separation purification of the product obtained from the reaction is easy compared with the separation purification of the product ...

Portion of a display screen with animated graphical user interface

Display method, device and system for transaction trend chart

The embodiment of the invention provides a display method, device and system for a transaction trend chart. The method comprises the steps of judging whether a screen turning event in which the vertical screen display is turned into the horizontal screen display is received or not, if yes, acquiring the extra display data added in the process of switching to a horizontal screen display drawing area from a vertical screen display drawing area and drawing the horizontal screen display drawing area; displaying the transaction trend chart in the horizontal screen display drawing area, wherein the extra display data are displayed in the transaction trend chart. The drawing area is full under the horizontal screen state, and the data size of the display content can be dynamically adjusted according to the change of the drawing area, so the screen utilization rate is fully improved.

Heat conductive magnesium alloy and method for preparing the same

Forming method of supporting system of skiing track

The invention relates to a forming method of a supporting system of a skiing track, belongs to the technical field of skiing tracks, and solves the problem of poor anti-seismic property of a track in the prior art. The method comprises the steps that S1, according to the shape of a racing track, the number and positions of racing track shear walls and racing track supporting columns are arranged; s2, base concrete of the racing track is poured; meanwhile, a track shear wall and a center supporting column of a track supporting column are arranged in the base concrete; s3, a track shear wall and a track supporting column are poured; and S4, racing track concrete is poured above the racing track shear walls and the racing track supporting columns. Rapid pouring forming of the ski track supporting system is achieved, elastic supporting of the track body is achieved, and meanwhile the anti-seismic performance of the whole track is improved.

Method, device and system for inputting information of securities

The embodiment of the invention provides a method, a device and a system for inputting information of securities. The method comprises the steps: creating a virtual digit keyboard interface and an input box, wherein a security code prefix area and a digit area are arranged in the virtual digit keyboard interface; capturing a key trigger event specific to the virtual digit keyboard interface, when judging that a trigger point of the key trigger event is located at the security code prefix area, displaying a security code prefix in the input box, and when judging that the trigger point of the key trigger event is located at the digit area, displaying digits in the input box. A special virtual digit keyboard is arranged, the switching time between a letter keyboard and a digit keyboard is saved, and a user can rapidly input a security code by the arranged prefix area, so the speed of inputting the information of securities is accelerated. The method, the device and the system can also be applied ...

Method for producing creep resistant magnesium alloy

The invention relates to a low-cost and creep-resistance magnesium alloy and a preparation method, which is characterized in that the creep-resistance magnesium alloy is made by die casting of the AZ91D, AM50B or AM60B melt with added Mg-Sr interalloy; the adding amount of Sr in the Mg-Sr interalloy is 0.10% to 5.0% of the amount of the AZ91D, AM50B or AM60B magnesium alloy in weight; and the method comprises three steps: first, the interalloy ingot of Mg-Sr (20% to 65% in weight) is obtained through melting cast; second, the interalloy ingot of Mg-Sr (20% to 65% in weight) is extruded into awire rod or a bar with the diameter of 2 mm to 60 mm; third, the conventional AZ91D, AM50B or AM60B magnesium alloy is melted; then the interalloy of Mg-Sr (20% to 65% in weight) is added into the AZ91D, AM50B or AM60B melt for die casting into the heat-resistant magnesium alloy. The invention has the advantages that creep resistance of the magnesium ally at the temperature of 150 to 175 DEG C can be ...

Method for weakening anisotropy of wrought magnesium alloy product

The invention relates to a method for weakening anisotropy of a wrought magnesium alloy product. The method includes: (1) conducting homogenization treatment on a magnesium alloy ingot; (2) subjecting the magnesium alloy ingot to multidirectional forging, taking a cuboid magnesium alloy blank with a square bottom surface, and ensuring the ratio of the height to the bottom edge less than 2; for a cylinder magnesium alloy ingot, firstly forging it into a cuboid so as to accord with the provisions of the cuboid magnesium alloy blank; marking side A, side B, and side C on the cuboid magnesium alloy blank, keeping the side A perpendicular to a longest side, and determining the side B and the side C arbitrarily; keeping the side A horizontal during first pass upsetting, keeping the side B horizontal during second pass upsetting, and keeping the side C horizontal during third pass upsetting, repeating the operation to 6-12 passes, and controlling the reduction per pass delta h at 10%h-40%h, with ...

Security information display method, apparatus, and system

The embodiment of the invention brings forward a security information display method, apparatus, and system. The method comprises the following steps that: a corresponding relation between a screen sliding event and a security queue display sequence is set; whether the screen sliding event is received is determined and security data of the current sequential security corresponding to the screen sliding event are obtained after the reception of the screen sliding event; and on the basis of the security data of the current sequential security, a display bitmap of the current sequential security is generated and is displayed. According to the invention, the finger interactive characteristic of the slide sensor technology is fully utilized and thus the switching efficiency of the security information displaying is improved. Moreover, the method, the apparatus and the system can be applied to various terminal entities in a cross-platform and cross-terminal mode; and the application range is ...

Homogenization treatment and subsequent processing method suitable for magnesium alloy ingots

The invention discloses a homogenization treatment and subsequent processing method suitable for magnesium alloy ingots. The method comprises the following steps: (1) analyzing components of a magnesium alloy and number of low melting point phases; (2) performing the following steps according to the number of low melting point phases: preheating at a temperature which is 10-20 DEG C lower than an initial melting temperature of the low melting point phase change, performing deformation comprising one or a combination of optional two in forging, extruding and rolling on the alloy, and performing long-term homogenization on the deformed alloy; (3) performing subsequent alloy treatment, comprising the following sub-steps: performing direct ageing, continuously deforming and performing ageing, raising the temperature to 10-20 DEG C below the initial melting temperature of the next low melting point phase change, deforming, homogenizing, repeating until the low melting point phases are completely ...

Preparation method of 1-N-ethyl gentamicin C1a sulfate

The invention discloses a preparation method of 1-N-ethyl gentamicin C1a sulfate. The method comprises the following steps of: carrying out a complexation reaction on gentamicin C1a and zinc acetate in a methanol solvent; then, dropping a mixed solution of acetic anhydride, triethylamine and tetrahydrofuran to carry out an acylation reaction and obtaining 3,2',6'-3-N-acetyl-gentamicin C1a by post-treatment; then, carrying out a silylation reaction with hexamethyl disilazane in a chloroform solvent; carrying out an N-alkylation reaction with acetaldehyde in a carrene solvent; then, carrying out a reduction reaction with potassium borohydride; hydrolyzing with an NaOH solution; obtaining 1-N-ethyl gentamicin C1a by post-treatment; adding the 1-N-ethyl gentamicin C1a to anhydrous ethanol or anhydrous methanol for stirring or dissolving; then, dropping concentrated sulfuric acid; and obtaining 1-N-ethyl gentamicin C1a sulfate by post-treatment. The method of the invention has higher yield.

Long -range surveyor's level control system

The utility model discloses a long -range surveyor's level control system, including the portion that sights that is used for realizing the surveyor's level on the horizontal direction pivoted horizontal rotary drum hydraulic buffer stop and the portion that sights that is used for realizing the surveyor's level at the flexible vertical expansion bend of vertical orientation, horizontal rotary drum hydraulic buffer stop and vertical expansion bend are worked by survey control centralized control, the survey control center still with the I/O control center electric connection that is used for realizing command input and the output of survey and drawing result, horizontal rotary drum hydraulic buffer stop and vertical expansion bend and survey control center all with power electric connection, the beneficial effects of the utility model are that: it is artifical inconvenient in the special engineering that reaches or take action to some, can use this system to carry out the safety of long ...

Racing track supporting column

The invention relates to a racing track supporting column, belongs to the technical field of skiing racing tracks, and solves the problem that the stability of a racing track becomes poor due to the fact that the performance of a rubber pad of a racing track stand column is reduced due to temperature influence in the prior art. The device comprises a concrete stand column, a center supporting column and an elastic cushion. The concrete stand column is arranged outside the center supporting column. The concrete stand columns are supported between the racing track concrete and the base concrete. The elastic cushion is arranged between the concrete stand column and the racing track concrete; the elastic cushion is of a multi-piece assembled structure; and a protective cover and a temperature control lamp are arranged outside the elastic cushion. Effective damping of the racing track support is achieved, the influence of the external environment on the performance can be reduced, and the elastic ...

High-strength heat-resistant magnesium alloy and smelting method thereof

The present invention relates to a high-strength heat-resistant magnesium alloy. Its composition contains (by wt%) 4.5-10% of Y, 0-8% of Gd, 0-6% of Dy, 0-5% of Tb, 0-5% of Ho, 0-5% of Er, 0-5% of Tm, 2-4.5% of Nd, or 3.5% of Sm and the rest is Mg. Said invention also provides its preparation method and concrete operation steps.

Heat-conducting and corrosion-resistant magnesium alloy and preparation method thereof

The invention discloses a heat-conducting and corrosion-resistant magnesium alloy comprising the following components: 0.5-3.5 percent by weight of Mn, 0.05-1 percent by weight of Zn, 0.05-1 percent by weight of Ca and the balance of Mg. The preparation method comprises the following steps of: preparing a cast by taking a pure magnesium ingot, a pure Zn ingot, MnCl2 or a magnesium-melting refining agent containing MnCl2, a pure Ca block or a Mg-Ca intermediate alloy as raw materials, melting a pure magnesium ingot, adding an alloy element of Mn and alloying Zn and Ca, or preparing billet ingots; carrying out uniform thermal treatment; deforming the billet ingots into plates, tubes, sections, bars, wires or various casts by adopting a rolling, pressing, pulling or forging process; and carrying out prestretching treatment. Under the condition of 20DEG C, the heat-conducting rate of the magnesium alloy is 132W.(m.K)<-1>, the corrosion speed rate of a standard salt mist is not more than 0.13g ...

Snowmobile sleigh racing track transformation method, snowmobile sleigh racing track and snowmobile sleigh body

The invention relates to the technical field of building construction, in particular to a snowmobile and sleigh racing track transformation method, a snowmobile and sleigh racing track and a snowmobile and sleigh car body for public experience and entertainment, and the snowmobile and sleigh racing track transformation method comprises the following steps: S1, foundation treatment; s2, grinding a racing track paving material, wherein the racing track paving material is engineering plastic material cloth; paving the racing track paving material on the ground with the bottom upward, and then polishing the surface of the bottom layer of the racing track paving material; s3, primer spreading and coating; s4, bonding the slide way; s5, cleaning the site; and S6, arranging a sled laying material corresponding to the racing track laying material at the bottom of the rubber sled. According to the method, the functions of the snowmobile and sleigh racing track after racing can be effectively expanded ...

High-strength heat-resistant magnesium alloy and smelting method thereof

High-toughness and heat-resisting magnesium-alloy and its melting method

Creep resistant magnesium alloy containing Si and C, and method for producing the same

The invention discloses a low cost creep resisting magnesium alloy including Si and C, and the preparation method thereof. Siliconcarbide, namely SiC is added in the solution of AZ91D, AM50B or AM60B through the die casting, therein, in the obtained magnesium alloy, the content of Si is 0.1 to 2.0 weight percent, the content of C is 0.04 to 0.86 weight percent, the siliconcarbide adopts siliconcarbide grains used as fireproof material or grinding material. The method comprises the following steps: step one, the siliconcarbide is warmed up to 100 DEG C to 700 DEG C; step two, traditional magnesium alloys of AZ91D, AM50B or AM60B are smelted, the adding amount of the siliconcarbide is calculated according to the percentage content of Si and C in the magnesium alloy required to be obtained, the preheated siliconcarbide is added in the AZ91D, AM50B or AM60B liquid, the magnesium alloy liquid including Si and C, and the magnesium alloy parts are obtained by die-casting. The creep resisting performance ...

Low cost creep resistanct magnesium alloy and method for producing the same

Transformer substation intelligence type illuminating system

The invention discloses a transformer substation intelligence type illuminating system. The transformer substation intelligence type illuminating system comprises an alternating current power source and a direct current power source, and achieves automatic switching between the alternating current power source and the direct current power source, wherein the alternating current power source passes through a QF1 circuit interrupter, and is connected with a U1 rectifier in series, rectified into a direct current type, and then connected with a wire inlet end of a KM1 contactor, the direct current power source passes through a QF2 circuit interrupter, and is connected with a wire inlet end of a KM2 contactor in series, a KM1 wire outlet end and a KM2 wire outlet end are connected with a KM3 wire inlet end, and the KM3 wire inlet end is connected with an emergency lamp. Due to the fact that the alternating current power source and the direct current power source are used and can be automatically ...

Method and apparatus for displaying statistical chart

A method and an apparatus for displaying a statistical chart. The method includes determining whether a screen rotation event of switching from portrait-orientation display to landscape-orientation display is received. The method further includes obtaining additional to-be-shown data added during switch from a portrait-orientation-display drawing area to a landscape-orientation-display drawing area if yes, and drawing the landscape-orientation-display drawing area. The method further includes displaying a statistical chart in the drawn landscape-orientation-display drawing area, where the additional to-be-shown data is shown in the statistical chart. A statistical chart fills a drawing area in a landscape-orientation state.

Intelligent overhead line power cut and supply device for electric locomotive

The invention discloses an intelligent overhead line power cut and supply device for an electric locomotive. The device comprises a shell; the shell is provided with four binding posts A, B, C and D; an overhead line power cut and supply circuit is arranged in the shell, long-term power supply of overhead lines is changed into sectional short-time power supply, namely only the running section of the electric locomotive is supplied with power, while other overhead lines are positioned in a power cut state; particularly, two direct-current power sources U1-DC24V and U2-DC48V which are lower than safe voltage are arranged in a circuit, the direct-current power sources can be switched according to different environments, and proper safe voltage is selected for power supply; meanwhile, an inversed diode VD is arranged in the circuit, voltage interference between AB and CD can be prevented, and the running stability is ensured.

High-strength and heat-resistant magnesium alloy containing two rare earths and preparation method thereof

The invention discloses a high-strength and heat-resistant magnesium alloy containing two rare earths. The high-strength and heat-resistant magnesium alloy containing the two rare earths comprises the components as follows: 14.0-17.0wt% of Y rare earth, namely Gd, Y and Er, 0.5-2.5wt% of Ce rare earth, namely one or several of La, Ce, Pr, Nd and Sm, 0.3-1.0wt% of Zr, impurities and the balance of Mg, wherein Gd is 11.0-15.0wt%, Y is 0.5-4.0wt% and Er is 0.5-2.0wt%; the content of Nd and Sm elements is 0.2wt% or less of the total amount of the magnesium alloy, or 0; the impurities including Fe, Si, Mn and a small amount of chloride; Fe is less than or equal to 0.002wt %, Si is less than or equal to 0.04wt%, Mn is less than or equal to 0.02wt%, and chloride is less than or equal to 0.002wt%; the impurity content is more than 0; Er in the Y rare earth can be replaced by one or several of Tb, Dy, Ho, Yb and Tm. The magnesium alloy has relatively high mechanical properties at room temperature ...

Aluminum alloy powder for additive manufacturing and preparation method and application thereof

In order to solve the problem that hot cracks are likely to be generated when existing high-strength aluminum alloys such as 2xxx series aluminum alloys and 7xxx series aluminum alloys are subjected to additive manufacturing, the aluminum alloy powder for additive manufacturing is provided and comprises, by weight, 90-99 parts of aluminum alloy powder and 1-10 parts of Ti-22Al-25Nb powder. Wherein the aluminum alloy powder comprises one or more of a 2xxx series aluminum alloy and a 7xxx series aluminum alloy. Meanwhile, the invention further discloses a preparation method and application of the aluminum alloy powder for additive manufacturing. When the aluminum alloy powder for additive manufacturing is used for additive manufacturing, grain refinement can be achieved, cracks of aluminum alloy are inhibited, and the mechanical property is improved.

Constant temperature device and constant temperature method for electric energy meter in alpine region

An alpine region electric energy meter constant temperature device and a constant temperature method belong to the field of electric energy meters. One end of the hydraulic cylinder is fixedly connected to the side face of the connecting base, a cylinder rod of the hydraulic cylinder penetrates through the connecting base to be fixedly connected with the friction device II, the hydraulic cylinder drives the friction device II to generate heat in the square block in a friction mode, and meanwhile the friction device I is driven by air pressure to slide in the square block. The square block is fixed on a wall body through the fixing bolt; and the electric energy meter is in sliding fit with a cavity in the middle of the square block. The constant temperature in the electric energy meter can be guaranteed through the friction device I, the friction device II and the friction device III, airflow in the device can be driven to flow through air pressure, the situation that water vapor in air ...

Magnesium alloy refining unit

The invention relates to magnesium alloy refining unit which comprises a pure magnesium ingot preheating furnace, a pure magnesium ingot melting furnace, an alloying element induction melting furnace, an alloying furnace, a holding furnace, a mixed gas protecting device, a heavy melted magnesium alloy ingot casting machine and / or a deformed magnesium alloy billet casting machine. By using the magnesium alloy refining unit to product magnesium alloy, the energy consumption for production is low, the production efficiency is high, the oxidation and burning loss of the metal during the production process are small, the production process is easy to control, the prepared magnesium alloy has a small amount of inclusion, the quality and the performance of the magnesium alloy can be improved, and the performance of the magnesium alloy is stable.

Synthesis method of 3,2',6'-tri-N-acetyl gentamicin Cla

The invention discloses a synthesis method of 3,2',6'-tri-N-acetyl gentamicin Cla, comprising the following steps of: carrying out coordination reaction on gentamicin Cla and zinc acetate in a methanol solent at 15-25 DEG C to form a gentamicin Cla-Zn coordination compound; cooling to 0-10 DEG C, dropwise adding and stirring a mixed solution prepared from acetic anhydride, triethylamine and tetrahydrofuran to the gentamicin Cla-Zn coordination compound, continuing stirring to make the mixture react for 1-2h after finishing dropwise adding the mixed solution, adding water, and carrying out reduced pressure distillation to obtain a concentrated solution containing a 3,2',6'-tri-N-acetyl gentamicin Cla-Zn coordination compound; and introducing the concentrated solution into a chromatographic separation column for sampling, washing with purified water, resolving with an ethanol water, collecting effective constituents at the outlet of the chromatographic separation column, carrying out reduced ...

Heat conductive magnesium alloy and method for preparing same

The invention relates to a heat-conductive magnesium alloy and a preparation method thereof. The heat-conductive magnesium alloy comprises the component content of: 2.5-11wt percent of Zn, 0.15-1.5wt percent of Zr, 0.1-2.5wt percent of Ag, 0.3-3.5wt percent of Ce, 0-1.5wt percent of Nd, 0-2.5wt percent of La, 0-0.5wt percent of Pr, wherein each content of Nd, La, Pr can not be zero at the same time or each content of Nd, La, Pr is zero at the same time, the rest component is Mg. Pure Mg ingot, pure Zn ingot, master alloy of Mg-Zr, pure Ag ingot or master alloy of Mg-Ag and pure Ce ingot or rich-cerium mischmetal ingot or Ce or master alloy of rich-cerium mischmetal ingot and magnesium are used as raw materials; pure Mg ingot is smelted and alloyed; after castings are made, solid dissolving treatment and aging treatment are the next steps; or after making billet, homogenization thermal treatment is the next step; sheet metal, tube, profile, rod, wire or other castings are made by adopting ...

Preparation method of magnesium-lithium-based composite material

According to the low-cost magnesium-lithium-based composite material preparation method provided by the invention, the existing stirring casting technology is improved by adopting the steps of splitting a material system, synchronously smelting a magnesium-lithium binary alloy and a lithium-free composite material, oppositely doping at a low temperature and rapidly solidifying, so that the advantages of low cost and large melt amount are reserved; and meanwhile, adverse reactions of Li, SiC and B4C in a melt state can be remarkably inhibited, so that the mechanical property and the elastic modulus of the magnesium-lithium-based composite material are remarkably improved, and the magnesium-lithium-based composite material has a relatively strong competitive advantage compared with an aluminum-lithium alloy.

Heat resisting magnesium alloy and method for producing the same

The invention relates to a low-cost and heat-resistant magnesium alloy and a preparation method, which is characterized in that the heat-resistant magnesium alloy is made by die casting of the AZ91D, AM50B or AM60B melt with added the Mg-Nd interalloy; the adding amount of Nd in the Mg-Nd interalloy is 0.10% to 3.0% of the amount of the AZ91D, AM50B or AM60B magnesium alloy in weight; and the method comprises three steps that: first, the interalloy ingot of Mg-Nd (20% to 60% in weight) is obtained through melting cast; second, the interalloy ingot of Mg-Nd (20% to 60% in weight) is extruded into a wire rod or a bar with the diameter of 2 mm to 60 mm; third, the conventional AZ91D, AM50B or AM60B magnesium alloy is melted, then the interalloy of Mg-Nd (20% to 60% in weight) is added into the AZ91D, AM50B or AM60B melt for die casting into the heat-resistant magnesium alloy. The invention has the advantages that creep resistance performance of the magnesium ally at the temperature of 150 ...

Method for synthesizing Arbekacin and intermediate dibekacin thereof

The invention relates to an organic synthesis method, in particular to a method for synthesizing an Arbekacin and an intermediate dibekacin thereof. The method comprises the following steps of: takinga kanamycin B as initial raw material, carrying out the following processes of aldol condensation, sulfonylation, sodium iodide replacement and elimination to form double bond, de-protection under acidic condition, amino-electron reduction and final hydrogenation, thus obtaining the dibekacin; taking 3',4'-dideoxy -3',4'-didehydro-kanamycin B as raw material, using a di-tert-butyl dicarbonate toselectively protect the amidogen of 3, 2', 6', 3'' sites; subsequently using the synthesized active ester to protect the 1-site amidogen; subsequently using tri-fluoroacetic acid to remove BOC; and carrying out hydrazinolysis and catalysis and hydrogenation of platinum oxide, thus obtaining the Arbekacin. The synthesis method has the advantages of simple operation, high outcome yield, reducing thecost ...

High-plasticity heat-resistant soluble magnesium alloy and preparation method thereof

The invention discloses a high-plasticity heat-resistant soluble magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 1 to 14 percent of Sn, 1 to 8 percent of Bi, 1 to 5 percent of Ag, 0.1 to 5 percent of Ce, 0.1 to 5 percent of Ni, 0.1 to 5 percent of Ti, 0.1 to 5 percent of Cu, 0.05 to 5 percent of Cr and the balance of Mg and inevitable impurity elements. Alloy elements are added in the form of high-temperature stable intermediate alloy, so that uniform distribution of solute atoms and controllability of degradation rate are realized. A gas protection electromagnetic smelting technology is adopted for manufacturing the cast ingot, directional diffusion of large-specific-gravity elements and refining of cast ingot crystal grains are achieved through electromagnetic stirring, rotary stirring and reverse stirring, and meanwhile, loss caused by settlement of alloy elements is avoided through temperature compensation ...

Method for analyzing motion state of snowmobile sled and readable storage medium

The invention discloses a method for analyzing the motion state of a snowmobile sleigh, a readable storage medium and a snowmobile sleigh racing track design method.The method comprises the following steps that S1, according to the characteristics of a snowmobile sleigh body and a snowmobile sleigh racing track, a snowmobile sleigh motion equation, a center line design formula and a three-dimensional curved surface design formula are prepared; the motion trail, speed and acceleration of the snowmobile sled body are obtained through the snowmobile sled motion equation; s2, carrying out site evaluation: carrying out auxiliary evaluation on site integrating degree according to a snowmobile sled motion equation and a center line design formula; s3, center line design: designing a track center line according to a snowmobile sled motion equation and a center line design formula; and S4, designing a three-dimensional curved surface of the racing track: designing the three-dimensional curved surface ...

High-strength heat-resistant magnesium alloy and smelting method thereof

The present invention relates to a high-strength heat-resistant magnesium alloy. Its composition contains (by wt%) 8-16% of Y, 2-4.5% of Nd, and the rest is Mg. Besides, said invention also provides its preparation method and concrete operation steps.

Heat conductive magnesium alloy and method for preparing same

The invention relates to a heat-conductive magnesium alloy and a preparation method thereof, the heat-conductive magnesium comprises the component contents of: 1.5-11wt percent of Zn, 0.5-5wt percent of Cu, 0.15-1wt percent of Mn, 0.1-2.5wt percent of Ag, the rest component is Mg. Pure Mg ingot, pure Zn ingot, electrolytic copper and electrolytic manganese or master alloy Cu-Mn are used as raw materials and pure Mg ingot is smelted and alloyed; after castings are made, then solid dissolving treatment and aging treatment are performed; or after making billet, homogenization thermal treatment is the next step; sheet metal, tube, profile, rod, wire or other casting are made by adopting the technologies of rolling, extrusion, drawing, forging or distortion process, then the aging treatment is carried out. The magnesium alloy of the invention, at the temperature of 20 DEG C, has thermal conductivity rate of above 120W. (m.K)-1, tensile strength of above 340 Mpa and yielding strength of above ...

Snowmobile sleigh racing track design method, snowmobile sleigh racing track and readable storage medium

The invention discloses a snowmobile sleigh racing track design method, a snowmobile sleigh racing track and a readable storage medium, the snowmobile sleigh racing track design method comprises the following steps: S1, preparing a snowmobile sleigh motion equation, a center line design formula and a three-dimensional curved surface design formula according to the characteristics of a snowmobile sleigh body and the snowmobile sleigh racing track; the motion trail, speed and acceleration of the snowmobile sled body are obtained through the snowmobile sled motion equation; s2, carrying out site evaluation: carrying out auxiliary evaluation on site integrating degree according to a snowmobile sled motion equation and a center line design formula; s3, center line design: designing a track center line according to a snowmobile sled motion equation and a center line design formula; and S4, designing a three-dimensional curved surface of the racing track: designing the three-dimensional curved ...

Supporting system of skiing track

The invention relates to a supporting system of a skiing track, belongs to the technical field of skiing tracks, and solves the problems that an existing skiing sleigh track is poor in use flexibility and time and labor are consumed in track overhauling. Comprising a racing track shear wall and racing track supporting columns, and the racing track shear wall and the racing track supporting columns are arranged between racing track concrete and base concrete and used for supporting a racing track; the racing track shear wall comprises two central supporting columns and a cross beam, concrete stand columns are poured outside the central supporting columns, and the cross beam is connected with the two concrete stand columns of the racing track shear wall and racing track concrete. The racing track supporting column comprises a central supporting column, a concrete stand column and a rubber pad; the rubber pad is arranged between the concrete stand column and the racing track concrete; and ...

Heat-conducting and corrosion-resistant magnesium alloy and preparation method thereof

Low-cost heat resistance magnesium alloy containing rare earth and preparation method thereof

The invention discloses a low-cost heat resistance magnesium alloy containing rare earth and a preparation method thereof. The low-cost heat resistance magnesium alloy containing the rare earth is formed by adding magnesium-rare earth intermediate alloy to the melted AZ91D, AM50B or AM60B and casting the materials. The weight percentage of the rare earth in the heat resistance magnesium alloy is 0.1 to 3.0 wt%; the rare earth is any one of La, Pr, Sm, Eu, Tb, Ho, Er, Tm, Dy, Gd, Ce, rich cerium mixed rare earth and rich neodymium mixed rare earth. The preparation method comprises the following steps of: casting 10 to 60 wt% of Mg-rare earth intermediate alloy ingot blank and extruding the blank into wire material or rod material; melting AZ91D, AM50B or AM60B magnesium alloy, cutting the wire material or rod material of the rare earth intermediate alloy into the sections, preheating and then adding the sections into the melted AZ91D, AM50B or AM60B and casting the melted liquid into the ...

Method for recording and observing corrosion behavior of magnesium alloy microstructure in situ

The invention relates to a method for recording and observing the corrosion behavior of a magnesium alloy microstructure in situ, and belongs to the field of material corrosion analysis. The method comprises the following steps: firstly, sampling, taking a metallographic specimen from a to-be-analyzed magnesium alloy material, carrying out rough grinding, fine grinding, polishing and corroding for later use; putting a cover glass with good light transparency on a shelving unit of a metallographic microscope, wherein the cover glass can completely cover a microscope observation hole; putting a processed sample on the cover glass, and adjusting a lens so as to obtain a clear metallographic structure; dipping a cotton swab in a corrosion salt solution, wiping the observation surface of the specimen lightly for multiple times, and putting the specimen on the cover glass; observing and recording the corrosion behavior of the specimen by the microscope, and recording the crystal boundary, the ...

Detachable box column connecting structure

The invention discloses a detachable box column connecting structure. The detachable box column connecting structure comprises an upper box column and a lower box column, and the connecting structures are respectively arranged along the axial direction and the radial direction of the two box-type columns and are used for fixing the upper box-type column and the lower box-type column together. The detachable box type column connecting structure is simple in form and reasonable in stress, on the premise that the connecting strength is guaranteed, the full-bolt column-column connecting mode of the box type column is optimized, space occupied by traditional column-column flange type connection is reduced, the column-column connecting assembly efficiency is improved, and the cost is reduced. The parts of the detachable box column connecting structure can be repeatedly used.

Toughening and deformation processing method of magnesium alloy

The invention discloses a toughening and deformation processing method of a magnesium alloy, which performs toughening and deformation processing on a melted and homogenized magnesium alloy billet. The method is combined by any more than two methods of metal plastic deformation processing methods containing forging deformation processing, extruding deformation processing, rolling deformation processing and stamping deformation processing, a latter deformation processing method is carried out on the magnesium alloy directly after the former deformation processing method or after the magnesium alloy is split when the former deformation processing method is finished, heating is not carried out between the two deformation processing methods, the magnesium alloy material after deformation processing is immediately subjected to water spray cooling or blow cooling when the last deformation processing method is finished, and the cooled magnesium alloy material is performed with aging heat treatment ...

Low cost heat-resistant magnesium alloy containing rare earth, and prepartion method

This invention discloses a method for preparing low-cost heat-resistant Mg alloy containing rare earth, which is prepared by: adding Mg/rare earth intermediate alloy into molten AZ91D, AM50B or AM60B Mg alloy, and die-casting. The rare earth content of the heat-resistant Mg alloy is 0.1-3.0 wt.%, and the rare earth is one of La, Pr, Sm, Eu, Tb, Ho, Er, Tm, Dy, Gd, Ce, Y, Ce-rich mixed rare earths and Nd-rich mixed rare earths. The method comprises: smelting Mg/rare earth intermediate alloy ingot (rare earth content = 10-60 wt.%), pressing into wire or rod, melting AZ91D, AM50B or AM60B Mg alloy, cutting Mg/rare earth intermediate alloy wire or rod, preheating, adding into molten AZ91D, AM50B or AM60B Mg alloy, and die-casting into heat-resistant Mg alloy. The heat-resistant Mg alloy has largely increased creep resistance at 120-200 deg.C, and can be used in cylinder body, automatic gear box, oil pump and crankcase.

Electric locomotive eliminator supply no -load automatic stop circuit system

The utility model discloses an electric locomotive eliminator supply no -load automatic stop circuit system, the circuit system is: when starting electric locomotive, when the operation control made it to reach the on -state, relay J coil constituted the route through parallelly connected condenser C1 and condenser C2 electric locomotive a line - pantograph - electric locomotive motor - rail, and J gets electric actuation, and J's the closed time relay SJ that makes of normally open contact gets electric actuation, and SJ's the closing of contact starts ac contactor JC, and the DC voltage is seen off to the rectifier, and electric locomotive gets electric operation. After electric locomotive controller return -to -zero disconnection, the load current of eliminator supply disappears ( rectifier diode ends) simultaneously, and J's return circuit is broken off, and J loses electricity release, and the mistake of SJ coil is electric, and the rectifier power is turned off to its SJ contact time ...

Recovery treatment method for used magnesium smelting fluxing agent or magnesium alloy smelting fluxing agent

The invention relates to a recovery treatment method for a used magnesium or magnesium alloy smelting fluxing agent. The method includes: (1) raising the temperature to 470-660DEG C and conducting melting; (2) carrying out sampling and component analysis: i. if the components accord with the main components and impurities of a magnesium smelting fluxing agent or a magnesium alloy smelting fluxing agent, encapsulating the magnesium or magnesium alloy smelting fluxing agent; ii. under the circumstance that the components do not accord with the main components and impurities of the magnesium or magnesium alloy smelting fluxing agent, i.e. generally over-standard of the impurity MgO, introducing HCl and converting MgO into MgCl2; then conducting sampling from the smelting fluxing agent and performing component analysis, under the circumstance that the components do not accord with the main components and impurities of the magnesium or magnesium alloy smelting fluxing agent, e.g. the content ...

Method for purifying rare earth magnesium alloy melt

The invention relates to a rare earth magnesium alloy purification method, and belongs to the technical field of metal melt purification treatment. The preparation method comprises the following steps: putting pure magnesium into a smelting furnace, melting under mixed protective gas of tetrachloroethane and argon, and after the temperature reaches 700-750 DEG C and before rare earth elements are added, treating the melt by adopting an ultrasonic treatment device to remove hydrogen; alloy elements are added for smelting; after smelting is completed, a melt in the smelting furnace is transferred into a tundish to be subjected to solvent refining, and then an ultrasonic treatment device is adopted for secondary ultrasonic treatment; and the melt in the tundish is transferred into a heat preservation furnace provided with a composite filtering device. By means of the multiple purification methods, the content of inclusions and hydrogen in alloy melt is greatly reduced; by using the ultrasonic ...

Heat conductive magnesium alloy and method for preparing the same

Preparation and processing method of high-entropy alloy reinforced light metal material

The invention discloses a preparation and processing method of a high-entropy alloy reinforced light metal material. The method comprises the following steps that (1) polystyrene and high-entropy alloy powder are mechanically stirred and mixed at the temperature of 0 DEG C; (2) the mixed powder is vacuumized, the vacuumized mixture is heated to 70-120 DEG C, heat preservation is conducted for 10-30 min, and foaming is completed; (3) crushing the foamed polystyrene-high-entropy alloy until the average particle size reaches 50-100 meshes, performing secondary mixing on the crushed powder and unfoamed polystyrene particles according to the mode in the step (1), and performing secondary foaming according to the mode in the step (2); (4) shaping the mixture subjected to secondary foaming, carving or trimming according to the requirements of parts, and then placing the parts in a sand box or a crucible; and pouring under negative pressure to gasify the model, enabling the liquid metal to occupy ...

Magnesium alloy refining unit

The invention relates to magnesium alloy refining unit which comprises a pure magnesium ingot preheating furnace, a pure magnesium ingot melting furnace, an alloying element induction melting furnace, an alloying furnace, a holding furnace, a mixed gas protecting device, a heavy melted magnesium alloy ingot casting machine and / or a deformed magnesium alloy billet casting machine. By using the magnesium alloy refining unit to product magnesium alloy, the energy consumption for production is low, the production efficiency is high, the oxidation and burning loss of the metal during the production process are small, the production process is easy to control, the prepared magnesium alloy has a small amount of inclusion, the quality and the performance of the magnesium alloy can be improved, and the performance of the magnesium alloy is stable.

Securities information display method, apparatus, and system

Implementation manners of the present disclosure put forward a securities information display method, apparatus, and system. The method includes: generating a securities information display interface, where the securities information display interface displays a display bitmap of a security; determining whether the securities information display interface receives a screen sliding event, where the screen sliding event is an event generated by sliding the securities information display interface; obtaining securities data of a security corresponding to the screen sliding event when the screen sliding event is received; and updating the display bitmap based on the obtained securities data.

Method And Apparatus For Displaying Statistical Chart

A method and an apparatus for displaying a statistical chart. The method includes determining whether a screen rotation event of switching from portrait-orientation display to landscape-orientation display is received. The method further includes obtaining additional to-be-shown data added during switch from a portrait-orientation-display drawing area to a landscape-orientation-display drawing area if yes, and drawing the landscape-orientation-display drawing area. The method further includes displaying a statistical chart in the drawn landscape-orientation-display drawing area, where the additional to-be-shown data is shown in the statistical chart. A statistical chart fills a drawing area in a landscape-orientation state. 1. A method for displaying a statistical chart , comprising:determining whether a screen rotation event of switching from portrait-orientation display to landscape-orientation display is received, and obtaining additional to-be-shown data added during switch from a portrait-orientation-display drawing area to a landscape-orientation-display drawing area if yes, and drawing the landscape-orientation-display drawing area; anddisplaying a statistical chart in the drawn landscape-orientation-display drawing area, the additional to-be-shown data being shown in the statistical chart.2. The method for displaying a statistical chart according to claim 1 , wherein the drawing the landscape-orientation-display drawing area comprises:determining coordinates of an upper-left vertex or coordinates of an upper-right vertex of the landscape-orientation-display drawing area; anddrawing the landscape-orientation-display drawing area from the top of a screen to the bottom of the screen based on the determined coordinates of the upper-left vertex or coordinates of the upper-right vertex of the landscape-orientation-display drawing area and a preset height of the landscape-orientation-display drawing area, wherein the width of the landscape-orientation-display ...

Method for forming a support system of a ski track

The present disclosure relates to a method for forming a support system of a ski track, belonging to the technical field of ski tracks, and solves the problem of poor seismic performance of tracks in prior art. Step 1: according to the shape of the track, arranging number and positions of track shear walls and track support columns; step 2: pouring base concrete of the track; at the same time, arranging second central support columns for the track shear walls and first center support columns for the track support columns in the base concrete; step 3: pouring the track shear walls and the track support columns; step 4: pouring track concrete over the track shear walls and the track support columns. The present disclosure realizes rapid pouring and forming of the support system for the ski track, and realizes elastic support for main body of the track, and improves the seismic performance of the track.

Method for forming a support system of a ski track

The present disclosure relates to a method for forming a support system of a ski track, belonging to the technical field of ski tracks, and solves the problem of poor 5 seismic performance of tracks in prior art. Step 1: according to the shape of the track, arranging number and positions of track shear walls and track support columns; step 2: pouring base concrete of the track; at the same time, arranging second central support columns for the track shear walls and first center support columns for the track support columns in the base concrete; step 3: pouring the 10 track shear walls and the track support columns; step 4: pouring track concrete over the track shear walls and the track support columns. The present disclosure realizes rapid pouring and forming of the support system for the ski track, and realizes elastic support for main body of the track, and improves the seismic performance of the track.