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Aging treatment method for increasing NiTiV shape memory alloy superelasticity

An aging treatment, memory alloy technology, applied in the field of shape memory alloys, can solve the problem of less aging treatment

Inactive Publication Date: 2008-09-17
ZHENJIANG YINUOWEI SHAPE MEMORY ALLOYS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, among the many studies, there are very few studies involving NiTiV shape memory alloys, and even less introductions about its aging heat treatment.

Method used

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  • Aging treatment method for increasing NiTiV shape memory alloy superelasticity
  • Aging treatment method for increasing NiTiV shape memory alloy superelasticity

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Experimental program
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Embodiment Construction

[0009] A test wire of NiTiV shape memory alloy with a length of 11 em and a diameter of 1.19 mm was selected, and the composition was Ni: 56.45wt%; Ti: 42.88t%; V: 0.67wt%. , phase transition point A f = -15°C.

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Abstract

A method for improving the hyperelastic aging treatment of the NiTiV shape memory alloy is characterized in that the aging treatment is carried out to the NiTiV shape memory alloy (The composition range thereof is: Ni: 55.5-57.3wt%; Ti: 41.8-43.4wt%; and V: 0.57-0.73wt%. Transmission point Af is equal to minus 35 DEG C-minus 5 DEG C), when the aging treatment temperature is 660 DEG C-750 DEG C, the holding time can be 40-80min. The elasticity is enhanced along with the increase of the holding time; when the aging treatment temperature is above 720 DEG C, the elasticity is no longer enhanced along with the increases of the aging treatment temperature and the holding time. The moderate temperature treatment is carried out uniformly to the sample after the aging treatment at 440 DEG C, and the holding time is 20min.

Description

technical field [0001] The invention relates to the field of shape memory alloys, in particular to an aging treatment method for improving the superelasticity of NiTiV shape memory alloys. Background technique [0002] With the rapid development of shape memory, NiTi-based alloys have been widely used because of their excellent shape memory effect, superelasticity and good mechanical properties. In recent years, people have devoted themselves to the study of the shape memory properties of NiTiX ternary alloys and have achieved extremely valuable research results. With the improvement of production technology and the progress of science and technology, people began to gradually deepen the research on memory alloys, and people also began to do some research on the superelasticity of memory alloys. Reference [1] (the performance of Mo Huaqiang NiTiNb shape memory alloys Research and its optimal design as a medium temperature pipe joint [D]. Doctoral dissertation of Sichuan Uni...

Claims

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Application Information

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IPC IPC(8): C22F1/10
Inventor 司松海司乃潮
Owner ZHENJIANG YINUOWEI SHAPE MEMORY ALLOYS
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