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High-toughness AlCrSc alloy powder for 3D printing and preparation method and application thereof

A 3D printing and aluminum alloy technology, applied in the field of high strength and toughness 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, solve the effect of low strength and low anisotropy

Active Publication Date: 2021-10-19
CRRC IND INST CO LTD
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  • Abstract
  • Description
  • Claims
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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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  • High-toughness AlCrSc alloy powder for 3D printing and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment provides an SLM print special aluminum alloy powder containing the following mass content: 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%, margin is Al, the above components are% in mass 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 the preparation method of the above SLM print special aluminum alloy powder, and the steps are as follows:

[0066] The above components are extracted by the set quality than extracting the raw materials, the raw materials are extracted in the form of a pure alloy or intermediate alloy, and the extracted raw materials are directly placed in a vacuum smelting crucible in a certain order, and the high flow performance aerosols are used. The resulting powder is performed to vibrate screening or a...

Embodiment 2

[0073] This embodiment provides an SLM print special aluminum alloy powder containing the following mass content: 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 margin is Al, the above components are each percentage 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 the preparation method of the above SLM print special aluminum alloy powder, and the steps are as follows:

[0079] The above components are extracted by the set quality than extracting the raw materials, the raw materials are extracted in the form of a pure alloy or intermediate alloy, and the extracted raw materials are directly placed in a vacuum smelting crucible in a certain order, and the high flow performance aerosols are used. The resulting powder is performed to vibrate ...

Embodiment 3

[0086] This embodiment provides an SLM print special aluminum alloy powder containing the following mass content: 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 margin is Al, and the above components are 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 the preparation method of the above SLM print special aluminum alloy powder, and the steps are as follows:

[0092] The above components are extracted by the set quality than extracting the raw materials, the raw materials are extracted in the form of a pure alloy or intermediate alloy, and the extracted raw materials are directly placed in a vacuum smelting crucible in a certain order, and the high flow performance aerosols are used. The resulting powder is performed to vibrate screening or airflow grad...

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Abstract

The invention relates to the technical field of aluminum alloy powder materials for 3D printing, in particular to high-toughness AlCrSc alloy powder for 3D printing and a preparation method and an application thereof. The aluminum alloy powder material for the 3D printing provided by the invention comprises the following alloy elements: 1.0 to 4.0 weight percent of Cr, 0.3 to 1.1 weight percent of Sc, 0.1 to 0.6 weight percent of Zr, 0.5 to 1.2 weight percent of Si, 0.1 to 0.7 weight percent of Mn, 0 to 6.0 weight percent of Mg, less than 0.1 weight percent of trace elements and the balance of Al; and the trace elements are one or more of Ti, Fe, Ni, Ce, Sr, Er and La. Research shows that according to the aluminum alloy powder obtained by controlling the conditions, a printed part formed by the 3D printing technology is high in density, strength and plasticity and good in corrosion resistance, yield ratio and fatigue performance, meanwhile, the problems of smoke dust and oxidation in the printing process are solved, and therefore the oxidation resistance and the fatigue resistance of the printed part are improved. The 3D printed part obtained through the method has great potential prospects in engineering application such as force bearing parts, light-weight integrated parts and heat exchangers and radiators.

Description

Technical field [0001] The present invention relates to the field of 3D printing aluminum alloy powder material, and in particular, a 3D printing high tough ALCRSC alloy powder and preparation method thereof are related to the preparation method thereof. Background technique [0002] At present, the industrial application of metal 3D printing is rapid, and the metal powder material is the upstream end of the 3D printing industry chain, and its demand variety and demand continue to rise. Existing commercially available 3D printing aluminum alloy powder is mainly ALSI 7 MG and ALSI 10 Mg alloy, but the intensity of these two types of alloy printed is lower, no more than 300MPa, and the elongation does not exceed 10%. [0003] Currently, there have been studies on Al-Zn-Mg-SC-SC-SC-based aluminum alloy 3D printing materials, in order to improve the strength and elongation of aluminum alloy while satisfying 3D printing needs. [0004] CN109487126A discloses a commercially available c...

Claims

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Application Information

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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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