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 ...

Manufacture method of aluminum alloy sheet for high-speed train structure

The invention relates to an aluminum alloy sheet for a high-speed train structure and a manufacture thereof, in particular to an aluminum alloy sheet and a manufacture thereof. The preparation method comprises the following steps of: (1) weighting raw materials; (2) melting; (3) casting; (4) homogenized annealing; (5) hot rolling; (6) cold rolling; (7) quenching; and (8) one-stage ageing treatment. The aluminum alloy sheet for the high-speed train structure has the tensile strength of 410-425 Rm/N/mm<2>, the yield strength of 360-382 RP0.2/N/mm<2> and the elongation rate of 12.2-13.4 percent.

Preparation method of aluminum-magnesium-erbium alloy cast ingot

The invention discloses an aluminum-magnesium-erbium alloy cast ingot and a preparation method thereof, and relates to an alloy and a preparation method thereof, which solve the problems of poor corrosion resistance, low intensity, short service life and high cost of the existing LY12 aluminum alloy material. The aluminum-magnesium-erbium alloy cast ingot is prepared from Si, Fe, Cu, Mn, Mg, Zn, Er, Be, Ti and Zr in the following steps: 1, weighing the raw materials; 2, preparing an aluminum alloy melt; and 3, sequentially filtering the aluminum alloy melt with ceramic filter disks of 30 ppi and 50 ppi, then pouring in a crystallizer, and casting into the aluminum-magnesium-erbium alloy cast ingot. The intensity of the aluminum-magnesium-erbium alloy cast ingot is at least 40 MPa higher than that of the LY12 alloy cast ingot, and the corrosion resistance of the aluminum-magnesium-erbium alloy cast ingot is one grade higher than that of the LY12 alloy cast ingot. Besides, compared withthe ...

Preparation method of large-size aluminum alloy ingot

The invention discloses a preparation method of a large-size aluminum alloy ingot, relating to a preparation method of aluminum alloy ingots, and the provided preparation method of a large-size aluminum alloy ingot solves the problem of easy cracking during preparing the large-size aluminum alloy ingots by the traditional aluminum alloy ingot preparation method. The method comprises the following steps of: spreading and scattering a 1# flux at the bottom of a smelting furnace; adding aluminum ingots, electrolytic copper, zinc ingots, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy, aluminum-manganese intermediate alloy, aluminum-chromium intermediate alloy and aluminum-titanium intermediate alloy into the smelting furnace and spreading and scattering a covering agent; heating to ensure that the materials are smelted, sequentially adding a zirconium composite salt and magnesium ingots as well as smelting and refining to obtain an aluminum alloy melt; filtering the aluminum ...

Preparation method of large-size aluminum alloy ingot

The invention discloses a preparation method of a large-size aluminum alloy ingot, relating to a preparation method of aluminum alloy ingots, and the provided preparation method of a large-size aluminum alloy ingot solves the problem of easy cracking during preparing the large-size aluminum alloy ingots by the traditional aluminum alloy ingot preparation method. The method comprises the following steps of: spreading and scattering a NO. flux at the bottom of a smelting furnace; adding aluminum ingots, electrolytic copper, zinc ingots, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy, aluminum-manganese intermediate alloy, aluminum-chromium intermediate alloy and aluminum-titanium intermediate alloy into the smelting furnace and spreading and scattering a covering agent; heating to ensure that the materials are smelted, sequentially adding a zirconium composite salt and magnesium ingots as well as smelting and refining to obtain an aluminum alloy melt; filtering the ...

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 ...

Aluminum-magnesium-erbium alloy cast ingot and preparation method thereof

The invention discloses an aluminum-magnesium-erbium alloy cast ingot and a preparation method thereof, and relates to an alloy and a preparation method thereof, which solve the problems of poor corrosion resistance, low intensity, short service life and high cost of the existing LY12 aluminum alloy material. The aluminum-magnesium-erbium alloy cast ingot is prepared from Si, Fe, Cu, Mn, Mg, Zn, Er, Be, Ti and Zr in the following steps: 1, weighing the raw materials; 2, preparing an aluminum alloy melt; and 3, sequentially filtering the aluminum alloy melt with ceramic filter disks of 30 ppi and 50 ppi, then pouring in a crystallizer, and casting into the aluminum-magnesium-erbium alloy cast ingot. The intensity of the aluminum-magnesium-erbium alloy cast ingot is at least 40 MPa higher than that of the LY12 alloy cast ingot, and the corrosion resistance of the aluminum-magnesium-erbium alloy cast ingot is one grade higher than that of the LY12 alloy cast ingot. Besides, compared with the ...

Aluminum alloy sheet for high-speed train structure and manufacture thereof

The invention relates to an aluminum alloy sheet for a high-speed train structure and a manufacture thereof, in particular to an aluminum alloy sheet and a manufacture thereof. The sheet of the invention is prepared from the following elements: Zn, Mg, Mn, Cr, Zr, V, Cu, Si, Fe, Ti and Al. The preparation method comprises the following steps of: (1) weighting raw materials; (2) melting; (3) casting; (4) homogenized annealing; (5) hot rolling; (6) cold rolling; (7) quenching; and (8) one-stage ageing treatment. The aluminum alloy sheet for the high-speed train structure has the tensile strength of 410-425 Rm/N/mm<2>, the yield strength of 360-382 RP0.2/N/mm<2> and the elongation rate of 12.2-13.4 percent.

Self-locking mechanism of top-bearing bidirectional motor-driven translation door without lower rail

The invention discloses a self-locking mechanism of a top-bearing bidirectional motor-driven translation door without lower rails, comprising a bidirectional motor-driven translation door hoisted on a rail by a guide wheel, wherein the upper end of the side edge of the center seam of the bidirectional motor-driven translation door is hinged with a bent rod by a spindle, one end of the bent rod is adaptive to a center seam baffle arranged on the rail, and the other end of the bent rod is hoisted with a round steel bolt via a steel wire rope; and the round steel bolt is adaptive to a ground embedded part below the bidirectional motor-driven translation door. When the bidirectional motor-driven translation door is closed, the round steel bolt of the self-locking mechanism is inserted into the ground embedded part to prevent the lower edge of the center seam of the door to move front and back; and when the bidirectional motor-driven translation door is opened, the round steel bolt automatically ...

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 ...

Scroll mechanism of roller shutter door capable of transversely moving

The invention discloses a scroll mechanism of a roller shutter door capable of transversely moving, comprising a left wallboard and a right wallboard which are fixed on a wall body. A left transverse moving plate is arranged in a left wallboard guide rail groove of the left wallboard; a right transverse moving plate is arranged in a right wallboard guide rail groove of the right wallboard; and a scroll is arranged between the left transverse moving plate and the right transverse moving plate, wherein a scroll drive motor is arranged on the transverse moving plate on one side; and a transverse moving plate driving mechanism is arranged on the transverse moving plate on the at least one side of the left transverse moving plate and the right transverse moving plate. The matched sizes of a gear and a rack are reasonably designed; when a door strip is folded by rolling or unfolded by rolling, the scroll of the roller shutter door is driven by rotating a circle to move forward or backward at ...

汉字音形三元输入法

... 汉字音形三元输入法，以汉字拼音首字母和笔划作为特征部件，其中笔划部件包括：单笔划、双笔划和多笔划，每个汉字和词组都用4个特征部件来定义，单字取拼音首字母+首字元+次字元+末字元，双字词取两个汉字的拼音首字母+首字元，与现有的各种汉字输入法对比，本发明有如下显著的特点：以构成汉字的最基本、最常用的拼音和笔划作为汉字的特征，笔划部件的取法简单直观，无需拆字，采用词组输入时以拼音为主，单字输入时拼音与字元相结合，四码输入，重码率极低，适合于听打和盲打，本发明还解决了在数字键盘上输入汉字难的问题，只要将区位码稍作记忆，就可在数字键盘上运用自如，具有中英文无需转换即可直接输入的效果，输入速度快。 ...

Chinese-character 'pronunciation-shape' three-element input method

A Chinese-character "three-element sound-shape" input method features that the beginning phonetic letter and the strokes including single stroke, dual-stroke and radical are used as characteristic elements, and each Chinese character or phrase is defined by 4 characteristic elements. Its advantages are simple and visual encoding, no need of splitting characters, 4-code input, low duplicate rate, easy use of numeral keypad, and high input speed.

High-strength high-toughness aluminum alloy pre-tensioned thick plate and preparation method thereof

A high-strength high-toughness aluminum alloy pre-tensioned thick plate and a preparation method thereof relate to an aluminum alloy pre-tensioned thick plate and a preparation method thereof and aim at solving problems that due to a poorly soluble compound which is formed by Fe, Si and other elements in 7A04 aluminum alloy or due to a eutectic compound generated during casting, aluminum alloy structural materials have bad toughness and low strength so that long-time safe and reliable work in bad working environment cannot be realized. The thick plate consists of the following components according to percentage by weight: 1.40-2.00% of Cu, 1.80-2.80% of Mg, 0.20-0.60% of Mn, 0.10-0.25% of Cr, 5.00-6.50% of Zn, 0-0.10% of Si, 0.05-0.25% of Fe, 0-0.05% of Ti, 0-0.10% of Ni, 0.01-0.05% of single impurity, 0.01-0.10% of aggregate impurity and the balance of Al. The preparation method is as follows: fusing and casting a flat aluminum alloy cast ingot; and carrying out homogenizing annealing, ...

Heat conductive magnesium alloy and method for preparing the same