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A kind of aluminum alloy powder material for 3D printing and its preparation method and application

A technology of 3D printing and powder materials, applied in the direction of additive manufacturing, additive processing, process efficiency improvement, etc., can solve the problem of poor stress corrosion resistance, strength and elongation to be improved, tensile strength and elongation can not be balanced, etc. question

Active Publication Date: 2022-02-22
CRRC IND INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In 3D printing technology, the commonly used aluminum alloy powder is mainly AlSi 12 Alloy and AlSi 10 Mg alloy, but these two types of alloys have low strength after printing, no more than 350MPa, and the elongation does not exceed 6%.
[0003] Foreign Airbus company has developed high-strength Scalmalloy aluminum alloy powder for 3D printing technology. The tensile strength and elongation can reach 520MPa and 13% respectively. The rate still needs to be improved, and there are some microcracks in the printed sample, resulting in insufficient fatigue performance, easy failure during use, and poor stress corrosion resistance
[0004] CN109487126A discloses a kind of aluminum alloy powder that can be used for 3D printing. It has the advantages of fine structure, good mechanical properties and strong stress corrosion resistance, but its tensile strength and elongation cannot be balanced. When the maximum tensile strength is 580MPa, Its elongation rate is reduced to 7%. This mismatch of strength and plasticity can easily lead to stress concentration of the sample during printing, which will lead to the problem of cracking of the printed part after printing.
[0005] It can be seen that in order to obtain a better 3D printing effect, it is necessary to simultaneously improve the tensile strength and plasticity of 3D printed parts, but there is no effective means to solve this problem in the existing technology

Method used

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  • A kind of aluminum alloy powder material for 3D printing and its preparation method and application
  • A kind of aluminum alloy powder material for 3D printing and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]A special aluminum alloy powder for SLM printing, containing the following components in mass percentage: Mg: 7.5wt%; Sc: 0.55wt%; Zr: 0.27wt%; Mn: 0.4wt%; Fe: 0.06wt%; Ni : 0.06wt%; Si: 0.65wt.%; Zn: 0.07wt%; Cr: 0.08wt%; other trace elements include Er and Ce, the total content is 0.05wt%, and the balance is Al.

[0034] The total content of Si+Mn is 1.05wt.%;

[0035] The mass ratio of Si / Mn is 1.625;

[0036] The total content of Si+Mg is 8.15wt.%;

[0037] The mass ratio of Si / Mg is 0.087;

[0038] The mass ratio of Sc / Zr is 2.037;

[0039] Its preparation steps are as follows:

[0040] Extract the raw materials from the above components according to the set mass ratio. The raw materials are extracted in the form of pure alloy or intermediate alloy. The extracted raw materials are directly put into the vacuum melting crucible in a certain order, and the vacuum induction melting-inert gas atomization system is adopted. powder, and then the obtained powder is sub...

Embodiment 2

[0050] A special aluminum alloy powder for SLM printing, containing the following components in mass percentage: Mg: 6.5wt%; Sc: 0.65wt%; Zr: 0.33wt%; Mn: 0.15wt%; Fe: 0.05wt%; Ni Si: 0.8%; Zn: 0.08wt%; Cr: 0.06wt%; other trace elements include Er and Ti, the total content is 0.06wt%, and the balance is Al.

[0051] The total content of Si+Mn is 0.95wt.%;

[0052] The mass ratio of Si / Mn is 5.33;

[0053] The total content of Si+Mg is 7.3wt.%;

[0054] The mass ratio of Si / Mg is 0.123;

[0055] The mass ratio of Sc / Zr is 1.97;

[0056] Its preparation steps are as follows:

[0057] Extract the raw materials from the above components according to the set mass ratio. The raw materials are extracted in the form of pure alloy or intermediate alloy. The extracted raw materials are directly put into the vacuum melting crucible in a certain order, and the vacuum induction melting-inert gas atomization system is adopted. powder, and then the obtained powder is subjected to vibrat...

Embodiment 3

[0066] A special aluminum alloy powder for SLM printing, containing the following components in mass percentage: Mg: 8.5wt%; Sc: 0.45wt%; Zr: 0.22wt%; Mn: 0.5wt%; Fe: 0.04wt%; Ni : 0.08wt%; Si: 0.55wt.%; Zn: 0.09wt%; Cr: 0.05wt%; other trace elements include Sr, Ti and Ce, the total content is 0.06wt%, and the balance is Al.

[0067] The total content of Si+Mn is 1.05wt.%;

[0068] The mass ratio of Si / Mn is 1.1;

[0069] The total content of Si+Mg is 9.05wt.%;

[0070] The mass ratio of Si / Mg is 0.065;

[0071] The mass ratio of Sc / Zr is 2.045;

[0072] Its preparation steps are as follows:

[0073] Extract the raw materials from the above components according to the set mass ratio. The raw materials are extracted in the form of pure alloy or intermediate alloy. The extracted raw materials are directly put into the vacuum melting crucible in a certain order, and the vacuum induction melting-inert gas atomization system is adopted. powder, and then the obtained powder is ...

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Abstract

The invention belongs to the technical field of aluminum alloy powder materials for 3D printing, and in particular relates to an aluminum alloy powder material for 3D printing and its preparation method and application. The invention provides an aluminum alloy powder material for 3D printing, the alloy elements of which include Mg, Sc, Zr, Mn, Fe, Ni, Si, Zn, Cr; wherein the total content of Si+Mn is 0.9% of the total mass of the aluminum alloy powder material ~1.5wt%, and the mass ratio of Si / Mn is 1~2 or ≥5. The present invention finds that through the above control, the tensile strength of the obtained aluminum alloy powder material after 3D printing by SLM method and proper heat treatment can be increased to more than 570MPa, and the plasticity can be increased to more than 17%. After multiple tests, there is no post-printing stress The cracking problem caused by concentration solves the problem that the existing aluminum alloy 3D printing parts are difficult to balance the tensile strength and plasticity.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy powder materials for 3D printing, and in particular relates to an aluminum alloy powder material for 3D printing and its preparation method and application. Background technique [0002] In 3D printing technology, the commonly used aluminum alloy powder is mainly AlSi 12 Alloy and AlSi 10 Mg alloy, but the strength of these two types of alloys after printing is low, no more than 350MPa, and the elongation is no more than 6%. [0003] Foreign Airbus company has developed high-strength Scalmalloy aluminum alloy powder for 3D printing technology. The tensile strength and elongation can reach 520MPa and 13% respectively. The efficiency still needs to be improved, and there are some microcracks in the printed samples, resulting in insufficient fatigue performance, easy failure during use, and poor stress corrosion resistance. [0004] CN109487126A discloses a kind of aluminum alloy powder tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08B22F1/00B22F10/28B22F9/08B33Y70/00B33Y80/00
CPCB22F1/0003C22C21/08B22F9/082B33Y70/00B33Y80/00B22F2009/0824Y02P10/25
Inventor 祝弘滨刘昱孙帮成龚明
Owner CRRC IND INST CO LTD
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