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Nickel-titanium alloy, preparation method and application thereof and nickel-titanium alloy component

A technology of nickel-titanium alloy, cold and heat cycle, applied in the field of alloys, can solve the problem that nickel-titanium alloy is difficult to have a stable phase transition temperature, etc.

Active Publication Date: 2022-03-18
SUZHOU RES INST SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a nickel-titanium alloy, its preparation method and application, and a nickel-titanium alloy component to solve the technical problem that it is difficult for nickel-titanium alloys to have a stable phase transition temperature

Method used

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  • Nickel-titanium alloy, preparation method and application thereof and nickel-titanium alloy component
  • Nickel-titanium alloy, preparation method and application thereof and nickel-titanium alloy component
  • Nickel-titanium alloy, preparation method and application thereof and nickel-titanium alloy component

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preparation example Construction

[0052] The embodiment of the present invention also provides a method for preparing a nickel-titanium alloy, which is used for the preparation of the above-mentioned nickel-titanium alloy, and the preparation method includes:

[0053] Quenching the nickel-titanium alloy after solid solution to room temperature to obtain the first nickel-titanium alloy, and performing at least one cooling and heating cycle on the first nickel-titanium alloy,

[0054] The cooling and heating cycle at least includes making the first nickel-titanium alloy complete a phase transformation from austenite to martensite and a phase transformation from martensite to austenite.

[0055] The cooling and heating cycle adopts the method of heating up from room temperature first, then cooling down to room temperature, which can make the nickel-titanium alloy complete the phase transformation from austenite to martensite, and from martensite to austenite, which is also beneficial Energy saving. In addition, ...

Embodiment 1

[0064] (1) Select a nickel-titanium alloy whose composition is Ti-50.8at.% Ni (Ni content is 50.8at.% atomic ratio), solution treatment at 1000°C for 2 hours, and then quenched to room temperature;

[0065] (2) Carry out cold and hot cycle 2 times to the nickel-titanium alloy after quenching;

[0066] (3) Place the nickel-titanium alloy after the cooling and heating cycle at room temperature for 24 hours to obtain a nickel-titanium alloy with stable phase transition temperature;

[0067] (4) The nickel-titanium alloy with stable phase transition temperature was subjected to 16 thermal cycles.

Embodiment 2

[0069] (1) Select a nickel-titanium alloy whose composition is Ti-50.8at.% Ni (Ni content is 50.8at.% atomic ratio), solution treatment at 800°C for 2 hours, and then quenched to room temperature;

[0070] (2) carry out cooling and heating cycle 5 times to the nickel-titanium alloy after quenching;

[0071] (3) Place the nickel-titanium alloy after the cold and heat cycle at room temperature for 1 week to obtain a nickel-titanium alloy with stable phase transition temperature;

[0072] (4) The nickel-titanium alloy with stable phase transition temperature was subjected to 15 thermal cycles.

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Abstract

The invention discloses a nickel-titanium alloy, a preparation method and application of the nickel-titanium alloy and a nickel-titanium alloy component, relates to the field of alloys, and aims to solve the technical problem that the nickel-titanium alloy in the prior art is difficult to have a stable phase transition temperature. The nickel-titanium alloy provided by the embodiment of the invention has a stable phase transition temperature, and is prepared by the following method: performing at least one cold and hot cycle on a first nickel-titanium alloy to obtain a second nickel-titanium alloy, placing the second nickel-titanium alloy at a preset temperature for a preset time, and performing low-temperature (room temperature to 100 DEG C) aging treatment to obtain the nickel-titanium alloy, the hot and cold circulation at least comprises the steps of enabling the first nickel-titanium alloy to complete phase transformation from austenite to martensite and phase transformation from martensite to austenite. The invention further discloses a preparation method of the nickel-titanium alloy. The nickel-titanium alloy provided by the invention is used in the shape memory material.

Description

technical field [0001] The disclosure relates to the field of alloys, in particular to a nickel-titanium alloy, its preparation method and application, and a nickel-titanium alloy component. Background technique [0002] As a metal smart material, nickel-titanium shape memory alloy has functional properties such as shape memory effect and superelasticity. In practical applications, nickel-titanium alloys generally undergo repeated phase transitions, and the phase transition temperature will gradually decrease with the increase in the number of thermal excitations, causing the phase transition temperature to deviate from the original set temperature range, making the memory alloy unable to The shape change occurs within a preset temperature range. [0003] In the prior art, thermal cycle training is generally used to eliminate the problem of unstable phase transition temperature, but it is still not enough to stabilize the phase transition temperature of nickel-titanium shap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10
CPCC22F1/006C22F1/10C22F1/002
Inventor 王协彬席瑞姜浩
Owner SUZHOU RES INST SHANDONG UNIV