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Preparation method of 4D printed copper-based shape memory alloy and 4D printed copper-based shape memory alloy

A memory alloy, 4D technology, applied in the field of 4D printing copper-based shape memory alloys, can solve the problems of limiting the application of CuAlMn shape memory alloys, poor shaping of CuAlMn shape memory alloys, large elastic anisotropy, etc., to improve the resistance to high temperature oxidation ability, reducing alloy cracking behavior, and improving mechanical properties

Active Publication Date: 2020-02-14
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation methods of CuAlMn shape memory alloys include traditional smelting casting and powder metallurgy methods. The CuAlMn shape memory alloys prepared by these methods hav

Method used

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  • Preparation method of 4D printed copper-based shape memory alloy and 4D printed copper-based shape memory alloy
  • Preparation method of 4D printed copper-based shape memory alloy and 4D printed copper-based shape memory alloy
  • Preparation method of 4D printed copper-based shape memory alloy and 4D printed copper-based shape memory alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare a new CuAlMn copper alloy composition 4D printing metal powder, and prepare it according to the mass percentage content, as follows: Al: 20%; Mn: 10%; Si: 0.3%; Ni: 0.3%; Zn: 0.1%; Mg: 0.05% ; Ti: 0.15%; Zr: 0.1%; Sc: 0.1%; the rest is copper.

[0031] Vacuum smelting: put the above-mentioned 4D printed ordinary copper alloy raw material pure metal block into a vacuum induction furnace for heating and smelting; the melting temperature of vacuum smelting is 1150°C, and the pressure in the furnace is 0.4MPa; atomized powder making uses nitrogen as the medium, The gas pressure is 4MPa.

[0032] Atomized powder making: using nitrogen as the medium, the molten metal after vacuum smelting is atomized and powdered to obtain copper alloy pre-alloyed powder;

[0033] Powder sieving treatment: pass the obtained powder through a 250-mesh sieve for sieving treatment;

[0034] Drying treatment: place the sieved copper alloy powder in a drying oven for drying, the drying te...

Embodiment 2

[0038] Prepare a new CuAlMn copper alloy composition 4D printing metal powder, and prepare it according to the mass percentage content, as follows: Al: 23%; Mn: 11%; Si: 0.5%; Ni: 0.6%; Zn: 0.2%; Mg: 0.15% ; Ti: 0.25%; Zr: 0.13%; Sc: 0.13%; the rest is copper;

[0039] Vacuum smelting: put the above-mentioned 4D printed common copper alloy raw material pure metal block into a vacuum induction furnace for heating and smelting; the melting temperature is 1150°C, and the pressure in the furnace is 0.4MPa;

[0040] Atomized pulverization: using nitrogen as the medium, atomize the molten metal after vacuum melting to obtain copper alloy pre-alloyed powder; atomized pulverization uses nitrogen as the medium, and the gas pressure is 4MPa;

[0041] Powder sieving treatment: pass the obtained powder through a 250-mesh sieve for sieving treatment;

[0042] Drying treatment: place the sieved copper alloy powder in a drying oven for drying, the drying temperature is 100° C., and the hold...

Embodiment 3

[0046] Prepare a new CuAlMn copper alloy composition 4D printing metal powder, and prepare it according to the mass percentage content, as follows: Al: 24%; Mn: 12%; Si: 0.7%; Ni: 0.8%; Zn: 0.3%; Mg: 0.2% ;Ti: 0.3%; Zr: 0.15%; Sc: 0.15%; the rest is copper;

[0047] Vacuum smelting: put the above-mentioned 4D printed common copper alloy raw material pure metal block into a vacuum induction furnace for heating and smelting; the melting temperature is 1150°C, and the pressure in the furnace is 0.4MPa;

[0048] Atomized powder making: using nitrogen as the medium, atomize the molten metal after vacuum smelting to obtain copper alloy pre-alloyed powder; atomized powder using nitrogen as the medium, and the gas pressure is 4MPa.

[0049] Powder sieving treatment: pass the obtained powder through a 250-mesh sieve for sieving treatment;

[0050] Drying treatment: place the sieved copper alloy powder in a drying oven for drying, the drying temperature is 100° C., and the holding time...

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Abstract

The invention discloses a preparation method of 4D printed copper-based shape memory alloy and the 4D printed copper-based shape memory alloy. The preparation method comprises the steps that 4D printed metal powder is prepared, specifically, the 4D printed metal powder comprises, by mass percentage, 10%-25% of Al, 5%-15% of Mn, 0.1%-0.9% of Si, 0.1%-1.0% of Ni, 0.01%-0.5% of Zn, 0.05%-0.3% of Mg,0.05%-0.4% of Ti, 0.05%-0.2% of Zr, 0.05%-0.2% of Sc and the balance copper; vacuum melting operation is conducted, powder is manufactured through atomization, powder screening is conducted, and drying operation is conducted; 4D printing is conducted; and heat treatment is conducted. According to the preparation method of the 4D printed copper-based shape memory alloy and the 4D printed copper-based shape memory alloy, due to the fact that other microelements are added to CuAlMn shape memory copper alloy, the shape memory effect of the CuAlMn alloy can be substantially improved, and the mechanical property is substantially improved. The martensite phase transformation point of the finished product which is prepared after 4D printing is accomplished can be accurately controlled at the temperature ranging from -20 DEG C to 200 DEG C by changing the components of the microelements.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to a preparation method of a 4D printing copper-based shape memory alloy and a 4D printing copper-based shape memory alloy. Background technique [0002] 4D printing technology is an emerging technology that uses specific additive manufacturing technology (commonly known as 3D printing) and smart materials with stimulus feedback to build objects. That is, objects constructed in three dimensions have fourth-dimensional changes under certain conditions (such as time, temperature, external force, and electric power), and the printed structure is no longer a static object, but programmable. Dynamic objects can realize intelligent programming and self-assembly process. Shape memory alloy smart materials are an important class of 4D printing alloy materials because of their shape memory effect under the action of time, temperature and external force. [0003] Shape memory alloy (shape m...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F1/00B22F3/105B33Y10/00B33Y80/00C22C9/01C22F1/08
CPCB22F1/0003B22F9/082C22C9/01C22F1/006C22F1/08B33Y10/00B33Y80/00B22F10/00B22F10/36B22F10/366B22F10/34B22F10/28B22F10/64B22F10/362Y02P10/25
Inventor 李瑞迪郑聃王银袁铁锤宋波史玉升
Owner CENT SOUTH UNIV
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