基于激光重熔的SLM成形316L不锈钢温度场仿真及工艺优化

doi:10.11896/cldb.23030304

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Abstract Laser remelting during SLM forming can improve metallurgical quality and performance, but the effect of laser remelting on the temperature field is still unclear. In this work, we use the finite element method to establish a model of 316L stainless steel, compare the temperature field characteristics of unremelted and remelted, and analyse the temperature results under different remelting process parameters; using prepared samples to analyse the density and pore size under different remelting process parameters. The results show that laser remelting has a good preheating effect, with a minimum temperature increase of approximately 69% for single-layer forming and only a 10% increase for multi-layer forming due to the effect of heat diffusion. The laser remelting process has no effect on the maximum temperature of the first laser scan, but can increase the temperature of the second scan. The remelting laser energy density increase from 29 to 117 J/m, with a maximum temperature increase of 36.40% and a minimum temperature increase of 12%. The improvement in density is not significant, but there is a significant reduction in pore size. When the laser remelting energy density is 50 J/m, the density is as high as 99.95% and the depth and width of the pores decreased by 64.9% and 35.2%.

Key words： selective laser melting laser re-melting 316L stainless steel temperature field

Published: 10 September 2024 Online: 2024-09-30

CLC number:

TG665

Fund:Guangdong Natural Science Foundation Project (2021A1515010398).

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	ZHENG Zhijun
	ZHENG Xiang

Cite this article:

ZHENG Zhijun,ZHENG Xiang. Temperature Field Simulation and Process Optimization of SLM Forming of 316L Stainless Steel Based on Laser Remelting[J]. Materials Reports, 2024, 38(17): 23030304-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23030304 OR http://www.mater-rep.com/EN/Y2024/V38/I17/23030304

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