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Shape memory alloy and its preparation method

A memory alloy and alloy element technology, applied in zirconium, niobium, aluminum-based shape memory alloys and their preparation, and titanium fields, can solve the problems of increased production costs, metal toxicity, poor processing performance, and poor processing performance. Shape memory recovery function, high non-toxicity to human body, high plasticity effect of cold working

Inactive Publication Date: 2007-11-28
王新敏
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Problems solved by technology

However, the alloy formed by the combination of this element and Ni belongs to an intermediate compound, which has poor processability and is easy to break, so the production cost increases and the use is limited; in addition, the Ni in the Ti-Ni alloy is harmful to the human body. Toxic elements, resulting in the application of Ti-Ni memory alloys in the body is greatly limited
Other shape memory alloys that have been developed also have disadvantages such as poor shape memory, narrow superelastic range, metal toxicity and poor processing performance to varying degrees.
The applicant once applied for a Chinese patent on the invention of the Ti-based ternary alloy, the application number is 02120724.0. Although some achievements have been made in the exploration and development of this aspect, it still needs to be further developed and perfected.

Method used

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  • Shape memory alloy and its preparation method
  • Shape memory alloy and its preparation method
  • Shape memory alloy and its preparation method

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preparation example Construction

[0023] A method for preparing a shape memory alloy is characterized in that the alloy element components are smelted into a solid metal and subjected to 50%-99% cold working deformation and material modification through solid solution and aging.

[0024] The solution heat treatment temperature is: 600°C-900°C, the time is: 20 minutes-120 minutes, the sample size is 1mm 3 Keep warm within 20 seconds; aging temperature: 150°C-360°C, time: 30 minutes-180 minutes, sample 1mm 3 Keep warm within 20 seconds.

Embodiment

[0025] Embodiment: (corresponding to Fig. 1-Fig. 10)

[0026] (1) The content of each component is: 53.7Ti-22Zr-23Nb-1.3Al;

[0027] (2) The content of each component is: 54.9Ti-22Zr-22Nb-1.1Al;

[0028] (3) The content of each component is: 54.4Ti-21Zr-23Nb-1.6Al;

[0029] (4) The content of each component is: 51.1Ti-23Zr-24Nb-1.9Al;

[0030] (5) The content of each component is: 54.2Ti-22.1Zr-22Nb-1.7Al;

[0031] (6) The content of each component is: 55.1Ti-23Zr-20Nb-1.9Al;

[0032] (7) The content of each component is: 54.9Ti-22Zr-22Nb-1.1Al,

[0033] Temperature 200°C, time 60 minutes;

[0034] (8) The content of each component is: 53.7Ti-22Zr-23Nb-1.3Al,

[0035] Temperature 320°C, time 60 minutes;

[0036] (9) The content of each component is: 54.5Ti-22Zr-22Nb-0.2Mo-1.3Al;

[0037] (10) The content of each component is: 54.6Ti-22Zr-22Nb-0.1Cr-1.3Al.

[0038] Among the above-mentioned constituent elements, Ti, the main component, has the following characteristics...

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Abstract

A shape memory alloy contains Ti (40-60 wt.%), Zr (15-25), Nb (15-25), one or more of Mo, V, Cr and Sn (0-2) and Al (0.5-2.5). It has high shape memory power, superelasticity and no poison to human body, so it can be durably implanted in human body.

Description

technical field [0001] The invention relates to a shape memory alloy and a preparation method thereof, in particular to a titanium, zirconium, niobium and aluminum series shape memory alloy and a preparation method thereof. Background technique [0002] At present, the traditional shape memory (superelastic) alloy is represented by Ti-Ni alloy. Ti is an element with excellent corrosion resistance. The main reason is that a fine and dense oxide film can be formed on the surface of Ti, which has strong protection and is difficult to destroy. However, the alloy formed by the combination of this element and Ni belongs to an intermediate compound, which has poor processability and is easy to break, so the production cost increases and the use is limited; in addition, the Ni in the Ti-Ni alloy is harmful to the human body. Toxic elements have greatly restricted the application of Ti-Ni memory alloys in the body. Other shape memory alloys that have been developed also have disadv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C30/00C22C1/02C22F1/00
Inventor 王新敏
Owner 王新敏
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