选区激光熔化快速成型过程温度场数值模拟

师文庆; 杨永强; 黄延禄; 程大伟

激光技术, 2008, 32 (4): 0410, 网络出版: 2010-06-03

选区激光熔化快速成型过程温度场数值模拟

Simulation of the temperature field in rapid prototyping of selective laser melting

论文大纲

师文庆 ^1,2杨永强 ^1,*黄延禄 ¹程大伟 ¹

作者单位

¹ 华南理工大学机械工程学院，广州 510640

² 广东海洋大学理学院，湛江 524088

激光技术选区激光熔化模拟温度场 laser technique selective laser melting simulation ANSYS ANSYS temperature field

摘要

为了优化铜磷合金粉末选区激光熔化快速成型的工艺参量，采用有限元分析软件ANSYS对其温度场进行了模拟，经理论分析和实验验证，获得了其温度场分布的数据。对材料未知温度范围内的热特性参量用插值法近似获得，采用不等网格剖分方式，用热焓去处理相变潜热问题。结果表明，其温度场的等温线分布为椭圆形，用模拟遴选的工艺参量(在铺粉厚度为0．22mm时，选用激光功率为100W、扫描速度为0．25m／s和激光束半径为0．1mm)能实现选区激光熔化快速成型。这一结果对其它粉末材料的选区激光熔化快速成型也是有帮助的。

Abstract

In order to implement rapid prototyping of Cu-P alloy powder based on selective laser melting,the temperature field was simulated by the finite element analysis software——ANSYS before fabrication so that its distribution could be obtained.During the process of simulation,the thermal physical parameters of material at certain temperature were obtained through interpolation method,an unequal meshing method was adopted and the thermal enthalpy could be used to replace the latent heat of fusion. It shows that the temperature field distribution likes an ellipse and the parameters selected by simulation(a laser power of 1OOW,a scanning speed of 0.25m/s and a beam spot radius of 0.l mm were selected when the layer thickness was 0.22mm)can be used in selective laser melting.

参考文献

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师文庆, 杨永强, 黄延禄, 程大伟. 选区激光熔化快速成型过程温度场数值模拟[J]. 激光技术, 2008, 32(4): 0410. SHI Wen-qing, YANG Yong-qiang, HUANG Yan-lu, CHENG Da-wei. Simulation of the temperature field in rapid prototyping of selective laser melting[J]. Laser Technology, 2008, 32(4): 0410.

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