选区激光熔化成形温度场模拟与工艺优化  

Simulation of Temperature Field for Optimization of Processing Parameters of Selective Laser Melting Metal Powders

作　　者：章文献[1] 史玉升[1] 李佳桂[1] 伍志刚[1] 

机构地区：[1]华中科技大学材料成形与模具技术同家重点实验室,湖北武汉430074

出　　处：《应用激光》2008年第3期185-189,250,共6页Applied Laser

基　　金：国家科技型中小企业创新基金(项目编号:05C26214201059)

摘　　要：在金属粉末的选择性激光熔化成形过程中,需要解决球化、翘曲、变形等难题。对于一定的金属粉末,通过优化成形工艺参数可以克服以上难题。为此,利用ANSYS有限元法对成形过程的熔池及温度场模拟,建立有限元模型,分析得出成形过程熔池的深度和宽度,预测并优化成形过程的工艺参数。通过实验验证,应用有限元法优化后的成形工艺参数能够成形出复杂金属零件。The phenomena such as bailing effect, warp, and distortion may occur in the process of selective laser melting （SLM） metal powders. These difficulties can be solved by optimizing the processing parameters during the process for a special metal powders. To optimize the parameters, the temperature field and molten pool dimensions during the SLM process are modeled and simulated with ANSYS finite element method. The analysis results are given and optimum processing parameters are verified by forming complex structure lattice iron parts with the SLM technology.

关 键 词：选择性激光熔化 有限元模型 熔池 温度场 

分 类 号：TG386.41[金属学及工艺—金属压力加工] TG156.99