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High-performance copper-based shape memory alloy material

A memory alloy and high-performance technology, applied in the field of high-performance copper-based shape memory alloy materials, can solve the problems of difficult processing, low fatigue life, and poor memory alloy fatigue, and achieve a major market competitive advantage and cost-effective effect.

Inactive Publication Date: 2012-04-04
ANHUI FENGHUI METAL
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Problems solved by technology

However, in the actual alloy preparation, the obtained copper-based shape memory alloy with polycrystalline structure has two outstanding shortcomings: low plasticity, difficult processing, and low fatigue life
On the other hand, copper-based shape memory alloys are far less fatigue-resistant than titanium-nickel alloys.

Method used

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  • High-performance copper-based shape memory alloy material
  • High-performance copper-based shape memory alloy material
  • High-performance copper-based shape memory alloy material

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Embodiment 1

[0029] A high-performance copper-based shape memory alloy material formula, which is composed of copper, zinc, aluminum, and trace elements rhenium and zirconium and a mixed solvent, wherein the weight percentage of each component is,

[0030]

[0031] Mixed solvent 0.6%, wherein mixed solvent is made up of potassium chloride, cryolite and sodium chloride, and its ratio is 1:3:9.

[0032] In Cu-Zn-Al alloy, the content change of Zn and Al has a great influence on the phase transition temperature of the alloy. For every 0.1% increase in Al content, the phase transition point will drop by about 15-20°C, and for every 0.1% increase in Zn content , the phase transition point drops by about 6-7°C; it is worth mentioning that the amount of Al element in the Cu-Zn-Al alloy is generally controlled between 3.5-6.5%. When the Al element content is higher than 6.5%, the alloy will be embrittled, making the forming process more difficult; and when the Al element content is lower than 3...

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Abstract

The invention relates to a high-performance copper-based shape memory alloy material, which is characterized by consisting of copper, zinc, aluminum, trace elements and a mixed solvent. A preparation method of the high-performance copper-based shape memory alloy material comprises the following steps of: homogenizing the raw materials at 600-700 DEG C, then preserving the temperature for 1h and cooling along with a furnace; carrying out solid solution treatment on raw materials at 700-900 DEG C for 10-20min and then hardening; ageing for 20-50min at 100-150 DEG C; and then carrying out cold rolling processing, wherein the rolling pass working rate is 10-40 percent. The practical shape memory alloy material with high performance cost, provided by the invention, realizes the large-scale production so as to replace the conventional NiTi alloy material; and in price, compared with the NiTi memory alloy, the copper-based memory alloy has significant market competition advantage.

Description

Technical field: [0001] The invention relates to the technical field of new materials, in particular to a high-performance copper-based shape memory alloy material. Background technique: [0002] Copper-based shape memory alloy is an important practical shape memory alloy with attractive application prospects due to its good performance and low price. However, in the actual alloy preparation, the obtained copper-based shape memory alloy with polycrystalline structure has two outstanding shortcomings: low plasticity, difficult processing, and low fatigue life. The research found that the reason is that the elastic coefficients of each crystal position direction of the shape memory alloy are very different, and its anisotropy factor is as high as 13, which leads to the deformation of different crystal positions at the grain boundary when the alloy is deformed Stress concentration causes intergranular fracture. The study also found that if the microstructure of the alloy is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22F1/08
Inventor 张枫
Owner ANHUI FENGHUI METAL
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