摘要
以有限元分析软件ANSYS为平台,对316不锈钢粉末激光烧结温度场分布进行了数值模拟。在考虑了材料的热物性参数随温度变化以及相变潜热等非线性情况下,建立了选择性激光烧结(SLS)三维有限元模型,利用ANSYS参数化设计语言APDL控制激光热源的热流密度、移动速度以及扫描路径,研究了工艺参数(激光功率、扫描速度、预热温度)对316不锈钢金属粉末成型过程中熔池及温度场分布产生的影响。模拟结果与前人文献实验结果相吻合,表明可以利用本模型对工艺参数进行优化,为实验工艺参数选取提供了理论依据。
The temperature field of 316 Stainless Steel Powder in selective laser sintering was simulated by ANSYS.A three-dimensional thermal finite model of selective laser sintering（SLS） was established based on the comprehensive analysis for thermophysical property parameters considered to be temperature-dependent and latent heat due to phrase transformation from powder to liquid.The density of the thermal flow,the velocity and the path of scanning can be controlled by the ANSYS Parameter Design Language（APDL）.The effects of process parameters,such as laser power,scan rate,preheating temperature,on the temperature filed and molten pool of 316 Stainless Steel Powder in selective laser sintering have been studied.The analysis results agree with the former research experimental results well.It was believed that the model in this study were useful for optimizing the process parameters of SLS.
出处
《组合机床与自动化加工技术》
北大核心
2010年第8期63-66,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
江西省自然科学基金项目(2008GZC0055)
江西省教育厅科技项目(GJJ09209)
华东交通大学基金(07JD05)
载运工具与装备省部共建教育部重点实验室开放基金资助项目
关键词
选择性激光烧结
有限元模拟
温度场
熔池
selective laser sintering
finite element simulation
temperature field
molten pool
