Simulation of the temperature field in rapid prototyping of selective laser melting
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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数,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数用插值法近似获得,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数(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 temperaturefield 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 throughinterpolation method,an unequal meshing method was adopted and the thermal enthalpy could be used to replace the latent heat offusion.It shows that the temperature field distribution likes an ellipse and the parameters selected by simulation(a laser power of100W,a scanning speed of 0.25m/s and a beam spot radius of 0.1mm were selected when the layer thickness was 0.22mm) canbe used in selective laser melting.
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Keywords:
- laser technique /
- selective laser /
- melting simulation ANSYS /
- temperature field
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