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Fe-Mn-Si-based shape memory alloy powder, preparation method and application thereof, 3D printing method and shape memory alloy

A fe-mn-si, memory alloy technology, applied in the field of Fe-Mn-Si-based shape memory alloy powder, shape memory alloy, can solve the problem that the shape memory effect cannot achieve the desired effect, does not have complex shape, can be used Field limitations and other issues, to achieve a good shape memory effect, improve shape memory performance, reduce the effect of irreversible plastic deformation

Pending Publication Date: 2020-12-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iron-based shape memory alloy prepared by traditional smelting casting and powder metallurgy methods, or the shape memory effect cannot achieve the desired effect, and the preparation process for the shape memory effect to meet the requirements is relatively complicated, and it does not have a complex shape, so Its field of use is very limited
At present, the research on the 3D printing process of Fe-Mn-Si based shape memory alloy is still in a blank

Method used

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  • Fe-Mn-Si-based shape memory alloy powder, preparation method and application thereof, 3D printing method and shape memory alloy
  • Fe-Mn-Si-based shape memory alloy powder, preparation method and application thereof, 3D printing method and shape memory alloy
  • Fe-Mn-Si-based shape memory alloy powder, preparation method and application thereof, 3D printing method and shape memory alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Preparation of Fe-Mn-Si-based shape memory alloy powder, prepared according to mass percentage content, the composition is as follows: Mn: 18%, Si: 6%, Cr: 8%, Ni: 4.5%, Zr: 0.1%, Sc: 0.1%, Co: 0.1%, Cu: 0.1%, Ti: 0.05%, Al: 0.3%, and the balance is Fe.

[0051] (2) Vacuum smelting: put the pure metal blocks of the above-mentioned components into a vacuum induction furnace for heating and smelting; the temperature of vacuum smelting is 1450°C, and the pressure in the furnace is 0.6MPa;

[0052] (3) Atomized pulverization: using nitrogen as a medium, the molten metal after vacuum smelting is subjected to gas atomization pulverization, and the atomization pressure is 5Mpa to obtain ferroalloy pre-alloyed powder;

[0053] (4) Powder sieving treatment: The atomized alloy powder is sieved and classified, and the metal powder with a mesh number of 100-200 mesh is taken as the raw material powder required for coaxial powder feeding printing.

[0054] (5) Drying treatment:...

Embodiment 2

[0060] (1) Preparation of Fe-Mn-Si-based shape memory alloy powder, prepared according to mass percentage content, the composition is as follows: Mn: 20%, Si: 6%, Cr: 9%, Ni: 7%, Zr: 0.3%, Sc: 0.4%, Co: 0.05%, Cu: 0.05%, Ti: 0.1%, Al: 0.3%, and the balance is Fe.

[0061] (2) Vacuum smelting: put the pure metal block of each component contained above into a vacuum induction furnace for heating and smelting; the temperature of vacuum smelting is 1550°C, and the pressure in the furnace is 0.5MPa;

[0062] (3) Atomized pulverization: using nitrogen as a medium, the molten metal after vacuum smelting is subjected to gas atomization pulverization, and the atomization pressure is 3Mpa to obtain ferroalloy pre-alloyed powder;

[0063] (4) Powder sieving treatment: The atomized alloy powder is sieved and classified, and the metal powder with a mesh number of 100-200 mesh is taken as the raw material powder required for coaxial powder feeding printing.

[0064] (5) Drying treatment: p...

Embodiment 3

[0069] (1) Preparation of Fe-Mn-Si-based shape memory alloy powder, prepared according to the mass percentage content, the composition is as follows: Mn: 20%, Si: 6%, Cr: 10%, Ni: 6%, Zr: 0.13%, Sc: 0.13%, Co: 0.05%, Cu: 0.05%, Ti: 0.08%, Al: 0.3%, and the balance is Fe.

[0070] (2) Vacuum smelting: put the pure metal block of each component contained above into a vacuum induction furnace for heating and smelting; the temperature of vacuum smelting is 1550°C, and the pressure in the furnace is 0.5MPa;

[0071] (3) Atomized pulverization: using nitrogen as a medium, the molten metal after vacuum smelting is subjected to gas atomization pulverization, and the atomization pressure is 7Mpa to obtain ferroalloy pre-alloyed powder;

[0072] (4) Powder sieving treatment: The atomized alloy powder is sieved and classified, and the metal powder with a mesh number of 100-200 mesh is taken as the raw material powder required for coaxial powder feeding printing.

[0073] (5) Drying trea...

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Abstract

The invention discloses Fe-Mn-Si-based shape memory alloy powder, a preparation method and application thereof, a 3D printing method and a shape memory alloy. The Fe-Mn-Si-based shape memory alloy powder comprises Mn, Si, Cr, Ni, Co, Cu, Ti, Al, Zr and Sc. By mass percent, the content of Mn is 14 to 30 percent, the content of Si is 4 to 10 percent, the content of Cr is 5 to 11 percent, the contentof Ni is 3 to 10 percent, the content of Co ranges from 0.02% to 0.3%, the content of Cu ranges from 0.05% to 0.2%, the content of Ti ranges from 0.05% to 0.3%, the content of Al ranges from 0.15% to0.5%, the content of Zr ranges from 0.03% to 0.3%, the content of Sc ranges from 0.05% to 0.4%, and the balance is Fe. The material and the preparation method provided by the invention have the advantages that the components are uniform, the preparation efficiency is high, a sample in a complex shape can be prepared, the shape memory effect is improved without post-treatment and thermal mechanical action, and the technological process is simplified.

Description

technical field [0001] The invention belongs to the technical field of special materials for additive manufacturing, and in particular relates to a Fe-Mn-Si-based shape memory alloy powder, its preparation method, application, 3D printing method and shape memory alloy. Background technique [0002] Compared with nickel-titanium and copper-based shape memory alloys, Fe-Mn-Si-based shape memory alloys have the advantages of low cost, easy processing and good welding performance, and have broad application prospects in pipeline connections, shape memory fixtures, fasteners, etc. , so it has been concerned by researchers at home and abroad. However, the recoverable strain of polycrystalline iron-based shape memory alloys prepared by casting and other processes is only about 2% without deformation processing (hot rolling, cold rolling or cold drawing), which cannot meet the requirements of engineering applications. At present, people mainly use "training" (the cyclic process of ...

Claims

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Application Information

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IPC IPC(8): C22C38/06C22C38/34C22C38/42C22C38/50C22C38/52C22C38/58B22F3/105B22F3/24B22F9/08C22C33/02B33Y10/00B33Y70/00
CPCC22C38/58C22C38/34C22C38/50C22C38/005C22C38/52C22C38/42C22C38/06B22F9/082B22F3/24C22C33/0285B33Y10/00B33Y70/00B22F2003/248B22F2009/0824
Inventor 李瑞迪姚聪袁铁锤
Owner CENT SOUTH UNIV