选区激光熔化316L粉末过程数值模拟研究

邱云基; 申梦清; 牛晓峰; 焦晋峰

doi:10.15980/j.tzzz.2021.09.007

研究·计算机应用 | 浏览量 : 0 下载量: 59 CSCD: 0

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选区激光熔化316L粉末过程数值模拟研究
Numerical Simulation of the Melting Process of Selective Laser Melting 316L Powders
2021年41卷第9期页码：1092-1096
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.09.007

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邱云基, 申梦清, 牛晓峰, 等. 选区激光熔化316L粉末过程数值模拟研究[J]. 特种铸造及有色合金杂志, 2021,41(9):1092-1096.

Qiu Yunji, Shen Mengqing, Niu Xiaofeng, et al. Numerical Simulation of the Melting Process of Selective Laser Melting 316L Powders[J]. Special Casting & Nonferrous Alloys, 2021,41(9):1092-1096.
邱云基, 申梦清, 牛晓峰, 等. 选区激光熔化316L粉末过程数值模拟研究[J]. 特种铸造及有色合金杂志, 2021,41(9):1092-1096. DOI： 10.15980/j.tzzz.2021.09.007.

Qiu Yunji, Shen Mengqing, Niu Xiaofeng, et al. Numerical Simulation of the Melting Process of Selective Laser Melting 316L Powders[J]. Special Casting & Nonferrous Alloys, 2021,41(9):1092-1096. DOI： 10.15980/j.tzzz.2021.09.007.

摘要

采用光滑粒子流体动力学方法建立了单道次选区激光熔化(SLM)的三维数学模型

耦合了流动场、温度场、表面张力以及润湿作用对选区激光熔化316L不锈钢粉末过程进行数值模拟研究。分析了不同激光功率对熔池长度和宽度的影响以及表面张力对SLM过程的影响

并与有限元模拟软件的模拟结果以及试验结果进行对比。结果表明

熔池的长度与宽度随着激光功率的增大而增大

同时也验证了马兰戈尼力是SLM过程的主要驱动力。

Abstract

A single SLM three-dimensional mathematical model was established using the smoothed particle hydrodynamics（SPH） method. The flow field

temperature field

surface tension and wetting action were coupled to simulate the SLM 316 L stainless steel powder. The influence of different laser power on the length and width of molten pool and the influence of surface tension on SLM process were analysed

and compared with the simulation and the experimental results of finite element simulation software. The results indicate that the length and width of the molten pool are increased with the increase of laser power

verifying that Marangoni is the driving force of SLM process.