Method for preparing NiTi memory alloy springs by amorphous molds

A technology of memory alloy springs and memory alloy wires, which is applied in the manufacture of springs from wires, stove types, household appliances, etc., can solve the problems of single structural shape and low production efficiency of shape memory alloy springs, and achieve the effect of high dislocation density

Active Publication Date: 2020-03-27
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a method for preparing NiTi memory alloy springs with an amorphous mold, so as to solve the problems of low preparation efficiency of shape memory alloy springs in the prior art and the singleness of the obtained structural shape.

Method used

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  • Method for preparing NiTi memory alloy springs by amorphous molds
  • Method for preparing NiTi memory alloy springs by amorphous molds
  • Method for preparing NiTi memory alloy springs by amorphous molds

Examples

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Embodiment 1

[0038] The present embodiment provides a kind of method that amorphous mold prepares NiTi memory alloy spring, and its flow process is as follows figure 1 shown, including the following steps:

[0039] 1) Cold drawing treatment:

[0040] Choose the NiTi memory alloy wire that diameter is 0.6mm circular cross-section, the chemical composition of this NiTi memory alloy wire is NiTi alloy, wherein the atomic percentage of Ni element is 50.8at%, the balance is Ti; This NiTi memory alloy wire is NiTi alloy The ingot is made by hot forging at 850°C and hot drawing at 500°C;

[0041] The NiTi memory alloy wire is cut to a suitable length and subjected to cold drawing treatment of 40% cold deformation;

[0042] 2) winding into a spring: using an inner core spring winding machine to wind the NiTi memory alloy wire after step 1) cold drawing into a spring with an inner diameter of 5 mm and an effective number of turns n=6;

[0043]3) Shape heat treatment: put the spring wound in step...

Embodiment 2

[0045] The present embodiment provides a kind of method that amorphous mold prepares NiTi memory alloy spring, and its flow process is as follows figure 1 shown, including the following steps:

[0046] 1) Cold drawing treatment:

[0047] Choose the NiTi memory alloy wire that diameter is 0.8mm circular cross-section, the chemical composition of this NiTi memory alloy wire is NiTi alloy, wherein the atomic percentage of Ni element is 50.8at%, the balance is Ti; This NiTi memory alloy wire is NiTi alloy The ingot is made by hot forging at 850°C and hot drawing at 500°C;

[0048] The NiTi memory alloy wire is cut to a suitable length and subjected to cold drawing treatment of 40% cold deformation;

[0049] 2) winding into a spring: using an inner core spring winding machine to wind the NiTi memory alloy wire after step 1) cold drawing into a spring with an inner diameter of 5 mm and an effective number of turns n=6;

[0050] 3) Shape heat treatment: put the spring wound in ste...

Embodiment 3

[0052] The present embodiment provides a kind of method that amorphous mold prepares NiTi memory alloy spring, and its flow process is as follows figure 1 shown, including the following steps:

[0053] 1) Cold drawing treatment:

[0054] Choose the NiTi memory alloy wire that diameter is 1.0mm circular section, the chemical composition of this NiTi memory alloy wire is NiTi alloy, wherein the atomic percentage of Ni element is 50.8at%, the balance is Ti; This NiTi memory alloy wire is NiTi alloy The ingot is made by hot forging at 850°C and hot drawing at 500°C;

[0055] The NiTi memory alloy wire is cut to a suitable length and subjected to cold drawing treatment of 40% cold deformation;

[0056] 2) winding into a spring: using an inner core spring winding machine to wind the NiTi memory alloy wire after step 1) cold drawing into a spring with an inner diameter of 5 mm and an effective number of turns n=6;

[0057] 3) Shape heat treatment: put the spring wound in step 2) i...

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Abstract

The invention discloses a method for preparing NiTi memory alloy springs by amorphous molds. The method comprises the steps of 1) cold drawing treatment: NiTi memory alloy wires are cold drawn; 2) formation of springs by winding: the NiTi memory alloy wires cold drawn in the step 1) are wound as the springs; and 3) shaping and heating: the springs wound in the step 2) are shaped and heated in a non-constraint state to obtain the NiTi memory alloy springs. The method prepares the shape memory alloy springs without needing shaping molds, and can prepare the memory alloy springs with complex structures.

Description

technical field [0001] The invention relates to the technical field of intelligent device manufacturing. More specifically, it relates to a method for preparing a NiTi memory alloy spring from an amorphous mold. Background technique [0002] Shape memory alloy springs can be used as functional structural elements such as driving, buffering, shock absorption, and energy storage, and have broad application prospects. However, the existing preparation methods of shape memory alloy springs are relatively complicated, the preparation efficiency is low, and the prepared springs have a single structure, which cannot meet the application requirements of complex structure shape memory alloy springs in special fields. [0003] A common method for preparing shape memory alloy springs: First, the shape memory alloy wire is wound on the threaded mold for fixing, then the threaded mold wrapped with the memory alloy wire is put into a high-temperature furnace for shaping treatment, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21F35/00C21D9/02C22F1/10C22C19/03
CPCB21F35/00C21D9/02C22C19/03C22F1/10
Inventor 郝世杰杜宝鹏李仲瀚崔立山
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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