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Method for controlling phase transition temperature of TiNiV memory alloy by cold deformation

A technology of memory alloy and phase transition temperature, which is applied in the field of shape memory alloy and can solve problems such as unpublished patents

Inactive Publication Date: 2012-12-12
ZHENJIANG YINUOWEI SHAPE MEMORY ALLOYS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for controlling phase transition temperature of TiNiV memory alloy by cold deformation

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Embodiment 1

[0011] 　　 When the TiNiV memory alloy is treated with a cold deformation amount of 15%, the phase transition temperature of the TiNiV memory alloy rises to the highest point, as shown in Table 1.

Embodiment 2

[0013] After the TiNiV memory alloy is treated with a cold deformation amount greater than 25%, the difference between the phase transition temperature of the TiNiV memory alloy and the original phase transition temperature is small, as shown in Table 1.

[0014]

[0015] Table 1 Phase transition temperatures of TiNiV memory alloys treated with different amounts of cold deformation

[0016] Cold deformation (%) As (℃) Af (°C) Ms (°C) Mf (°C) 0 -1.0 4.9 -10 -11.3 5 3.8 7.0 -8.5 -10.2 10 3.5 6.8 -8.7 -10.3 15 2.8 6.0 -9.2 -10.6 25 0.0 5.5 -9.5 -11.0 40 -1.8 4.5 -10.5 -11.8

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Abstract

The invention discloses a method for controlling the phase transition temperature of a TiNiV memory alloy by cold deformation, belonging to the technical field of shape memory alloys. The method is characterized in that the TiNiV memory alloy is subjected to cold deformation treatment to form a sheet or wire, wherein cold deformation degrees are 5 percent, 10 percent, 15 percent, 25 percent and 40 percent respectively; and the cold deformation treatment is realized by two modes: first mode: the TiNiV memory alloy is pressed to form a sheet; and second mode: the TiNiV memory alloy is subjected to cold drawing to form the wire; and the sizes of two specifications can be determined according to the requirement of the engineering.

Description

technical field [0001] The invention belongs to the technical field of shape memory alloys, in particular to a method for controlling the phase transition temperature of TiNiV memory alloys through cold deformation. Background technique [0002] As we all know, TiNiV memory alloys have to undergo cold deformation treatment in the production process, such as cold rolling and cold drawing to form sheets or wires before they can be applied. The change temperature has a significant effect, that is to say, the phase transition temperature of the TiNiV memory alloy will increase after cold deformation treatment, which causes the phase transition temperature of the TiNiV memory alloy to be unstable during the application process, so find out the relationship between the amount of cold deformation and The relationship of phase transition temperature is crucial. [0003] Aiming at this problem, the present invention develops a method for controlling the phase transition temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
Inventor 赵罗根张志敏白高鹏司松海杨嵩齐宝林陆松华
Owner ZHENJIANG YINUOWEI SHAPE MEMORY ALLOYS