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A kind of high strength and toughness alcrsc alloy powder for 3d printing and its preparation method and application

A 3D printing, aluminum alloy technology, applied in the field of high-strength and tough AlCrSc alloy powder for 3D printing and its preparation, can solve the problems of poor oxidation resistance and stress corrosion resistance, unstable parts quality, printing failure, etc., and achieve good fatigue resistance. Performance, low resolution strength, low anisotropy effect

Active Publication Date: 2022-06-21
CRRC IND INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the tendency of the powder to absorb and reflect during the laser heating and melting process, the stability of the laser selective forming process is affected, and smoke and dust appear during the printing process, which affects the quality and performance of the printed parts
In actual part printing, local cracks and microcracks still exist on the surface and inside of the part, resulting in unstable part quality or even printing failure, and poor oxidation resistance and stress corrosion resistance
[0005] CN111001800A discloses a high-strength Al-Cr-Sc alloy for 3D printing. By replacing Mg with Cr, an ideal solidified microstructure can be obtained. Its formula has compactness, no cracks, wear resistance, corrosion resistance, high temperature oxidation resistance and static Excellent characteristics; but its performance needs to be optimized, and the technology does not reflect its yield ratio and fatigue performance

Method used

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  • A kind of high strength and toughness alcrsc alloy powder for 3d printing and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment provides a special aluminum alloy powder for SLM printing, which contains the following components by mass percentage: Cr: 1.5%, Sc: 0.5%, Zr: 0.3%, Si: 0.8%, Mn: 0.3%, Mg: 0%, Ti: 0.1%, Fe: 0.1%, Ni: 0.1%, Ce: 0.01%, Sr: 0.01%, Er: 0.01%, La: 0.01%, the balance is Al, the sum of the above components by mass percentage is 100%.

[0061] in:

[0062] The total content of Si+Mg is 1.8%;

[0063] The mass ratio of Sc / Zr is 1.67;

[0064] The total content of Mn+Fe is 0.4%.

[0065] The present embodiment also provides a method for preparing the above-mentioned special aluminum alloy powder for SLM printing. The steps are as follows:

[0066] The raw materials are extracted from the above components according to the set mass ratio, and the raw materials are extracted in the form of pure alloy or intermediate alloy. The obtained powder is subjected to vibratory sieving or air classification.

[0067] Conditions for vacuum induction melting: the degree o...

Embodiment 2

[0073] This embodiment provides a special aluminum alloy powder for SLM printing, which contains the following components by mass percentage: Cr: 3.0%, Sc: 0.8%, Zr: 0.6%, Si: 1.0%, Mn: 0.35%, Mg: 3.0%, Ti: 0.1%, Fe: 0.05%, Ni: 0.1%, Ce: 0.01%, Sr: 0.01%, Er: 0.01%, La: 0.01%, the balance is Al, the sum of the mass percentages of the above components is 100%.

[0074] in:

[0075] The total content of Si+Mg is 4.0%;

[0076] The mass ratio of Sc / Zr is 1.3;

[0077] The total content of Mn+Fe is 0.4%.

[0078] The present embodiment also provides a method for preparing the above-mentioned special aluminum alloy powder for SLM printing. The steps are as follows:

[0079] The raw materials are extracted from the above components according to the set mass ratio, and the raw materials are extracted in the form of pure alloy or intermediate alloy. The obtained powder is subjected to vibratory sieving or air classification.

[0080] Conditions for vacuum induction melting: the ...

Embodiment 3

[0086] This embodiment provides a special aluminum alloy powder for SLM printing, which contains the following components by mass percentage: Cr: 4.0%, Sc: 0.6%, Zr: 0.6%, Si: 1.0%, Mn: 0.3%, Mg: 3.5%, Ti: 0.1%, Fe: 0.01%, Ni: 0.1%, Ce: 0.01%, Er: 0.01%, La: 0.01%, the balance is Al, and the sum of the mass percentages of the above components is 100%.

[0087] in:

[0088] The total content of Si+Mg is 4.5%;

[0089] The mass ratio of Sc / Zr is 1;

[0090] The total content of Mn+Fe is 0.31%.

[0091] The present embodiment also provides a method for preparing the above-mentioned special aluminum alloy powder for SLM printing. The steps are as follows:

[0092] The raw materials are extracted from the above components according to the set mass ratio, and the raw materials are extracted in the form of pure alloy or intermediate alloy. The obtained powder is subjected to vibratory sieving or air classification.

[0093] Conditions for vacuum induction melting: the degree of ...

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Abstract

The invention relates to the technical field of aluminum alloy powder materials for 3D printing, in particular to a high-strength and tough AlCrSc alloy powder for 3D printing and its preparation method and application. The alloying elements of the aluminum alloy powder material for 3D printing provided by the present invention include: Cr: 1.0-4.0wt%, Sc: 0.3-1.1wt%, Zr: 0.1-0.6wt%, Si: 0.5-1.2wt%, Mn : 0.1~0.7wt%, Mg: 0~6.0wt%, trace element: <0.1wt%, the balance is Al; the trace element is one of Ti, Fe, Ni, Ce, Sr, Er, La or several. Studies have shown that the aluminum alloy powder obtained by controlling the above conditions, the printed parts formed by 3D printing technology have high density, strength, plasticity, corrosion resistance, yield strength ratio and fatigue performance, and at the same time solve the problem of the printing process. Soot and oxidation problems, thereby improving the anti-oxidation and anti-fatigue properties of printed parts. The 3D printed parts obtained by the present invention have great potential prospects in engineering applications such as load-bearing parts, lightweight integrated parts, and radiator replacements.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy powder materials for 3D printing, in particular to a high-strength and tough AlCrSc alloy powder for 3D printing and a preparation method and application thereof. Background technique [0002] At present, the industrial application of metal 3D printing is growing rapidly. As the upstream end of the 3D printing industry chain, metal powder materials continue to increase in demand and demand. The current commercially available aluminum alloy powder for 3D printing is mainly AlSi 7 Mg and AlSi 10 Mg alloy, but the strength of these two types of alloys after printing is low, not more than 300MPa, and the elongation does not exceed 10%. [0003] At present, there has been research on Al-Zn-Mg-Sc series aluminum alloy 3D printing materials, in order to meet the needs of 3D printing, while improving the strength and elongation of aluminum alloys. [0004] CN109487126A discloses a commercial spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C21/02C22C21/08B22F9/08B22F10/28B22F10/64B33Y10/00B33Y70/00B33Y40/20
CPCC22C21/00C22C21/02C22C21/08B22F9/082B22F10/28B22F10/64B33Y10/00B33Y70/00B33Y40/20B22F2009/0848B22F2009/0824Y02P10/25
Inventor 折洁祝弘滨王行涛刘昱龚明
Owner CRRC IND INST CO LTD
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