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Processing method suitable for 4D printed nickel-titanium shape memory alloy

A technology of memory alloy and processing method, which is applied in the field of alloy forming and manufacturing, can solve the problems such as shape memory effect and superelasticity of 4D printing nickel-titanium shape memory alloy, and achieve the elimination of structural defects, grain refinement, and easy implementation Effect

Active Publication Date: 2019-05-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current research on 4D printing NiTi alloys is still in its infancy, and the process parameters have a great influence on the phase transition characteristics, mechanical properties, porosity and geometric characteristics. Research on memory effect and superelasticity

Method used

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  • Processing method suitable for 4D printed nickel-titanium shape memory alloy
  • Processing method suitable for 4D printed nickel-titanium shape memory alloy
  • Processing method suitable for 4D printed nickel-titanium shape memory alloy

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Embodiment 1

[0040] The processing method suitable for 4D printing nickel-titanium shape memory alloy provided by the first embodiment of the present invention mainly includes the following steps: put the 4D printing nickel-titanium shape memory alloy part into a high-temperature box furnace, and pass argon gas into the furnace ; Then raise the temperature of the high-temperature box furnace to 300°C at a heating rate of 80°C / h, keep it warm for 30 minutes and then cool it down to room temperature in the furnace.

Embodiment 2

[0042] The processing method suitable for 4D printing nickel-titanium shape memory alloy provided by the second embodiment of the present invention mainly includes the following steps: put the 4D printing nickel-titanium shape memory alloy part into a high-temperature box furnace, and pass argon gas into the furnace ; Then raise the temperature of the high-temperature box furnace to 300°C with a heating rate of 80°C / h, keep it warm for 60 minutes and then cool it to room temperature in the furnace.

Embodiment 3

[0044] The processing method suitable for 4D printing nickel-titanium shape memory alloy provided by the third embodiment of the present invention mainly includes the following steps: put the 4D printing nickel-titanium shape memory alloy part into a high-temperature box furnace, and pass argon gas into the furnace ; Then raise the temperature of the high-temperature box-type furnace to 300°C, the heating rate is 80°C / h, keep the temperature for 90 minutes, and then cool to room temperature in the furnace.

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Abstract

The invention belongs to the technical field of alloy molding and manufacturing, and discloses a processing method suitable for a 4D printed nickel-titanium shape memory alloy. The processing method includes the following steps that (1) 4D printed nickel-titanium shape memory alloy parts are printed and molded by using an SLM, the material of the 4D printed nickel-titanium shape memory alloy partsis the nickel-titanium alloy consisting of nickel and titanium, by the mass percentage, wherein the mass percentage of the nickel is 55-56%, and the mass percentage of titanium is 44-45%; (2) the 4Dprinted nickel-titanium shape memory alloy parts are heated to 300-700 DEG C, and heat insulation is conducted for 30-90min; and (3) the 4D printed nickel-titanium shape memory alloy parts are cooledto the room temperature, so that the processing of the 4D printed nickel-titanium shape memory alloy parts is completed. The processing method is simple in process, convenient to implement, higher inflexibility and higher in applicability.

Description

technical field [0001] The invention belongs to the technical field related to alloy forming and manufacturing, and more specifically relates to a processing method suitable for 4D printing nickel-titanium shape memory alloys. Background technique [0002] With the rapid development of shape memory alloys, nickel-titanium-based alloys have been the most widely studied and applied for their excellent shape memory effect, superelasticity and good mechanical properties. Due to the continuous development and progress of manufacturing technology, scholars began to study memory alloys gradually. The literature pointed out that in order to make nickel-titanium memory alloys have better shape memory effect and superelasticity after processing, three heat treatment processes are usually memorized, namely Medium temperature treatment (heat preservation at 400°C to 500°C after cold processing), low temperature treatment (processed after complete annealing, and then heat preservation at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F3/24C22C19/03B33Y10/00
CPCY02P10/25
Inventor 文世峰刘洋周燕史玉升王冲胡辉陈柯宇甘杰
Owner HUAZHONG UNIV OF SCI & TECH
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