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Method for preparing shape memory copper alloy

A technology of copper alloy and memory, which is applied in the field of preparation of shape memory copper alloy, can solve the problems of difficulty in raising martensitic transformation temperature and increasing production cost, and achieve low production cost, improved strength and toughness, and good shape memory performance Effect

Active Publication Date: 2012-12-05
鹰潭市一帆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the memory alloy of the above-mentioned patent, either a large amount of zinc is used to make it difficult to increase the phase transition temperature of martensite; or the amount of gallium added is very high, resulting in increased production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a shape memory copper alloy, the copper alloy is composed of the following components in weight percent: Ni 2.5%, Al 6%, Mn 6%, Be 1.0%, Zn 2%, Sb 1.4%, La 0.05% , Gd 0.14%, Dy 0.02%, Y 0.004%, and the balance is Cu. Described preparation method comprises the following steps:

[0025] 1) Prepare the raw materials of each component, wherein Al is made of electrolytic aluminum plates, Cu is made of electrolytic copper rods, and the rest of the components are made of industrially pure metal ingots.

[0026] 2) Put the raw material in a heating furnace for smelting, the melting temperature is 1210°C, stir evenly during the smelting process, analyze the composition, make the alloy composition meet the above content range, then keep it for 20 minutes, adjust the pouring temperature to 1170°C, pour Into lath-shaped ingots.

[0027] 3) heat-treat the lath-shaped ingot at 870° C. for 12 hours.

[0028] 4) After heat treatment, it can be formed into part...

Embodiment 2

[0030] A preparation method of a shape memory copper alloy, the copper alloy is composed of the following components in weight percent: Ni 3.5%, Al 5%, Mn 8%, Be 0.8%, Zn 3%, Sb 1.0%, La 0.1% , Gd 0.12%, Dy 0.03%, Y 0.002%, and the balance is Cu. Described preparation method comprises the following steps:

[0031] 1) Prepare the raw materials of each component, wherein Al is made of electrolytic aluminum plates, Cu is made of electrolytic copper rods, and the rest of the components are made of industrially pure metal ingots.

[0032] 2) Put the raw material in a heating furnace for smelting, the melting temperature is 1230°C, stir evenly during the smelting process, analyze the composition, make the alloy composition meet the above content range, then keep it for 10 minutes, adjust the pouring temperature to 1180°C, pour Into lath-shaped ingots.

[0033] 3) heat-treat the lath-shaped ingot at 890° C. for 10 hours.

[0034] 4) After heat treatment, it can be formed into part...

Embodiment 3

[0036] A method for preparing a shape memory copper alloy, the copper alloy is composed of the following components in weight percent: Ni 3.0%, Al 5.5%, Mn 7%, Be 0.9%, Zn 2.5%, Sb 1.2%, La 0.08% , Gd 0.13%, Dy 0.025%, Y 0.003%, and the balance is Cu. Described preparation method comprises the following steps:

[0037] 1) Prepare the raw materials of each component, wherein Al is made of electrolytic aluminum plates, Cu is made of electrolytic copper rods, and the rest of the components are made of industrially pure metal ingots.

[0038] 2) Put the raw material in a heating furnace for smelting, the melting temperature is 1220°C, stir evenly during the smelting process, analyze the composition, make the alloy composition meet the above content range, then keep it for 15 minutes, adjust the pouring temperature to 1175°C, pour Into lath-shaped ingots.

[0039] 3) heat-treating the lath-shaped ingot at 880° C. for 10-12 hours.

[0040] 4) After heat treatment, it can be formed ...

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Abstract

The invention discloses a method for preparing shape memory copper alloy. The copper alloy consists of the following components in percentage by weight: 2.5 to 3.5 percent of Ni, 5 to 6 percent of Al, 6 to 8 percent of Mn, 0.8 to 1.0 percent of Be, 2 to 3 percent of Zn, 1.0 to 1.4 percent of Sb, 0.05 to 0.1 percent of La, 0.12 to 0.14 percent of Gd, 0.02 to 0.03 percent of Dy, 0.002 to 0.004 percent of Y and the balance of Cu. The method for preparing the shape memory copper alloy comprises the following steps of: 1) preparing raw materials of all components, wherein the raw material of Al is an electrolysis aluminum plate, the raw material of Cu is an electrolysis copper rod, and the raw materials of residual components are industrial ingot metal; 2) placing the raw materials in a heating furnace and smelting at the smelting temperature of between 1,210 and 1,230 DEG C, uniformly stirring, analyzing components to ensure that the alloy components meet the requirement of the content range, preserving heat, standing for 10 to 20 minutes, adjusting pouring temperature to be 1,170 to 1,180 DEG C, and pouring to obtain a lath-shaped ingot block; 3) performing thermal treatment on the lath-shaped ingot block at the temperature of between 870 and 890 DEG C for 10 to 12 hours; and 4) after thermal treatment, performing die forging and forming at the temperature of between 880 and 920 DEG C to obtain a part or a thin plate.

Description

technical field [0001] The invention relates to the technical field of copper alloys, in particular to a preparation method of a shape memory copper alloy. Background technique [0002] There are three types of memory alloys: nickel-titanium alloys, copper-based alloys and iron alloys. Nickel-titanium alloys have higher memory performance, reaching 4 to 8%. However, nickel and titanium are strategic materials, the current price is high, and the production process is complicated, and the cost is high; copper-based alloys include: copper-zinc-aluminum, copper-aluminum-nickel, copper-aluminum-beryllium, copper-aluminum-manganese. The main disadvantage of copper-zinc-aluminum alloys is that the phenomenon of memory decay is serious; other copper-based alloys produced by smelting and rolling form coarse grains and polycrystals, and the direction of performance varies greatly, resulting in grain boundary fractures with weak strength perpendicular to the stress direction , the me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/05C22C1/02C22F1/08
Inventor 李伟
Owner 鹰潭市一帆新材料有限公司
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