Aluminum alloy powder and preparation method thereof

An aluminum alloy and powder technology is applied in the field of aluminum alloy powder and its preparation, and the processing method of laser melting is selected, which can solve the problems of low strength, limited promotion and application of aluminum-lithium alloy additive manufacturing technology, and micro-cracks.

Pending Publication Date: 2022-04-08
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, conventional aluminum-lithium alloy materials are prone to microcracks and low strength when printed by selective la

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Al-4Cu-1Li-0.3Mg-0.4Ag-0.6Sc-0.3Zr alloy powder was prepared, the melting furnace was cleaned before powder making, and the inner wall of the melting chamber was wiped with alcohol-moistened cleaning cloth. New crucibles should be wiped with an alcohol-moistened cleaning cloth. The smelted raw materials are deoxidized, ultrasonically washed and dried before feeding.

[0034] Melting process technology: Add aluminum ingots into the crucible, and the vacuum degree in the melting chamber reaches 1×10 -2 After Pa is below, fill the smelting chamber with high-purity argon to make the pressure of the smelting chamber the same as the atmospheric pressure, and start smelting. During the smelting process, first adjust the power of the intermediate frequency furnace so that the temperature in the crucible is 400°C, and preheat the aluminum ingot to heat the raw material evenly and release the mixed gas. At the same time, the high-purity argon gas filling valve and one-way exhaus...

Embodiment 2

[0038] Al-4Cu-1Li-0.5Mg-0.4Ag-0.4Sc-0.2Zr alloy powder is prepared, the melting furnace is cleaned before powder making, and the inner wall of the melting chamber is wiped with a cleaning cloth moistened with alcohol. New crucibles should be wiped with an alcohol-moistened cleaning cloth. The smelted raw materials are deoxidized, ultrasonically washed and dried before feeding.

[0039] Melting process technology: Add aluminum ingots into the crucible, and the vacuum degree in the melting chamber reaches 1×10 -2 After Pa is below, fill the smelting chamber with high-purity argon to make the pressure of the smelting chamber the same as the atmospheric pressure, and start smelting. During the smelting process, first adjust the power of the intermediate frequency furnace so that the temperature in the crucible is 400°C, and preheat the aluminum ingot to heat the raw material evenly and release the mixed gas. At the same time, the high-purity argon gas filling valve and one-way ex...

Embodiment 3

[0043] Al-4Cu-1Li-0.2Mg-0.4Ag-0.4Sc-0.2Zr alloy powder was prepared, the melting furnace was cleaned before powder making, and the inner wall of the melting chamber was wiped with alcohol-moistened cleaning cloth. New crucibles should be wiped with an alcohol-moistened cleaning cloth. The smelted raw materials are deoxidized, ultrasonically washed and dried before feeding.

[0044] Melting process technology: Add aluminum ingots into the crucible, and the vacuum degree in the melting chamber reaches 1×10 -2 After Pa is below, fill the smelting chamber with high-purity argon to make the pressure of the smelting chamber the same as the atmospheric pressure, and start smelting. During the smelting process, first adjust the power of the intermediate frequency furnace so that the temperature in the crucible is 400°C, and preheat the aluminum ingot to heat the raw material evenly and release the mixed gas. At the same time, the high-purity argon gas filling valve and one-way exhaus...

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PUM

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Abstract

The invention provides aluminum alloy powder for selective laser melting forming. The aluminum alloy powder is prepared from, by mass, 3.7%-4.3% of Cu, 0.8%-1.2% of Li, 0.25%-0.8% of Mg, 0.25%-0.6% of Ag, 0.2%-1.0% of Sc, 0.1%-0.5% of Zr and the balance Al and unremovable impurity elements. Part of alloy samples obtained through the method are smooth in surface, free of obvious cracks and high in density, after heat treatment, the tensile strength is 580 MPa, the yield strength is 525 MPa, the ductility is 7%, and the satisfactory comprehensive performance of strength and toughness is achieved. The method has a wide application prospect in the field of aerospace.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to an aluminum alloy powder and a preparation method thereof, and the aluminum alloy powder is particularly suitable for processing by laser melting. [0002] technical background [0003] Selective laser melting technology (SLM) is a process that uses metal powder to melt layer by layer to prepare metal parts. Compared with traditional production methods, SLM technology can integrally form completely dense near-net shape components, which solves the forming of many complex structural parts. , and greatly reduced the processing steps and shortened the processing cycle. Therefore, laser additive manufacturing technology has been developed rapidly and has been applied in industry. Laser additive manufacturing of aluminum alloys has become increasingly important in the manufacture of high-performance complex parts in various modern industries, including automotive, aerosp...

Claims

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Application Information

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IPC IPC(8): C22C21/16C22C1/03B22F1/00B22F9/08B22F10/28B33Y70/00
Inventor 李杜曹玄扬严雷鸣宰雄飞颜铁林
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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