摘要
综合考虑金属粉末激光直接烧结的热流施加和材料高温下热学性能参数与温度关系的非线性,基于ANSYS平台建立了移动高斯热源作用下激光烧结的三维瞬态有限元温度场模型,利用APDL语言编制程序实现热源移动,同时考虑相变潜热对温度场的影响。重点分析了激光功率、扫描速度和预热温度这三个重要的工艺参数不同组合下温度场的分布规律及传热学行为。模拟结果与先前实验结果吻合较好,表明可以利用此模型进行工艺参数优化,并为后续的应力场分析做好准备。
Heat flux loading in direct metal laser sintefing （DMLS） and thermophysical property parameters nonlinear with temperature in high temperature had taken into account comprehensively, and 3D transient state FE model of the temperature field of direct metal laser sintering in moving Gauss heat resource has been established based on ANSYS. Thermal resource moving has carried out by using APDL（ANSYS Parametric Design Language） and the effect of phase - change latent heat has been considered. Temperature field＇ s regularities of distrlbudon and heat tranffer behavior of three important process parameters of various combination including laser power, scan rate, preheating temperature had been analysed emphasizly. The simulation results agrees with the previous experimental result well. The simulation result show that this FE model can help to optimize process parameters , the most of all , this method can supply the temperature condition in computation of subsequent residual stress of DMLS process.
出处
《激光杂志》
CAS
CSCD
北大核心
2007年第3期70-72,共3页
Laser Journal
关键词
金属粉末激光直接烧结
ANSYS
温度场
direct metal laser sintering （DMLS）
ANSYS
temperature field evolution
Finite element simulation
作者简介
翁孟超,男（1974-）,浙江诸暨人,讲师,主要研究方向：机械电子与产品快速成形,工作单位：浙江师范大学交通学院.
