激光与CMT+P电弧复合增材工艺对2024铝合金气孔缺陷的影响规律

doi:10.11896/cldb.23040011

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Abstract The laser-arc hybrid additive manufacturing technology for high-strength aluminum alloys has a broad application prospect in civil aviation, but there are still technical challenges in controlling its porosity. This work investigated the porosity of thin-walled additive parts made of 2024 aluminum alloy based on laser and cold metal transition plus pulse (CMT+P) arc hybrid additive manufacturing technology. The influence of process parameters such as wire feeding speed, scanning speed and laser power on the macroscopic morphology, porosity and pore scale distribution of the thin-walled additive parts was investigated through single-factor tests. Based on the single-factor test, the process parameters were optimized by the response surface central composite design test(CCD) with the porosity of the thin-walled additive parts as the response value. The results show that the process parameters such as wire feeding speed, scanning speed and laser power all affect the macroscopic morphology, porosity and pore scale distribution of the additive parts; the established quadratic regression response surface models can visually reflect the relationship between the process parameters and the porosity of 2024 aluminum alloy laser and CMT+P arc hybrid additive, and can be used to predict the porosity of thin-walled additive parts under different process parameters; the optimized parameters of the 2024 aluminum alloy laser and CMT+P hybrid additive process obtained by the quadratic regression model range from 4.8—5.0 m/min for the wire feeding speed, 16—18 mm/s for the scanning speed, and 2 000—2 200 W for the laser power.

Key words： high-strength aluminum alloy laser-CMT+P additive manufacturing single-factor test response surface method porosity

Published: 25 July 2024 Online: 2024-08-12

CLC number:	TG455
	V252.2

Fund:Scientific Research Project of Tianjin Education Commission (2020KJ020) and Aeronautical Science Foundation of China (2020Z049067002).

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	Articles by authors
	ZHANG Zhiqiang
	HE Shiwei
	LI Hanxi
	LU Xuecheng
	ZHANG Tiangang
	WANG Hao

Cite this article:

ZHANG Zhiqiang,HE Shiwei,LI Hanxi, et al. Effect of Laser and CMT+P Arc Hybrid Additive Process on Porosity Defectsin of 2024 Aluminum Alloy[J]. Materials Reports, 2024, 38(14): 23040011-9.

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http://www.mater-rep.com/EN/10.11896/cldb.23040011 OR http://www.mater-rep.com/EN/Y2024/V38/I14/23040011

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