不锈钢316L间接选区激光烧结工艺参数优化研究  

Study on the indirect selective laser sintering of 316L for the optimization of process parameters

作　　者：任乃飞[1] 葛小兵[1] 王权[1] 李阳[1] 赵新宏[1] 杭雅慧 徐玮[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《功能材料》2014年第8期8083-8086,共4页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB013004);江苏高校优势学科建设工程资助项目(苏财教(2011)8号);江苏省高等教育自然科学研究基金资助项目(11KJA460003);江苏省光子制造科学与技术重点实验室开放基金资助项目(GZ201114)

摘　　要：在不锈钢间接选区激光烧结过程中,由于存在温度梯度场,将产生较大的残余应力和翘曲变形,从而会降低成型件的烧结精度。为了提高不锈钢件的激光烧结成型质量,对316L间接选区激光烧结耦合热应力场进行了数值模拟分析,与烧结实验进行了对比研究。研究表明,模拟结果与烧结实验的实物变形趋势相吻合,验证了模拟的正确性。采用该模拟方案,结合正交试验方法对激光功率、扫描间距、扫描速度和预热温度等4个工艺参数进行了优化,获得了一组最优工艺设计参数。研究结果为间接选区激光烧结成形质量提供了有力的工艺参数判据,具有重要的经济价值和应用前景。During the indirect selective laser sintering of stainless steel parts,the precision of forming parts will be reduced.Due to the temperature gradient field,greater residual stress and warpage will be produced.To improve the sintering quality of stainless steel parts,the paper presented numerical analysis on coupled thermal stress field of 316Lsintering.Then the results were compared with experiments.These results demonstrated the simulation was consistent with the physical deformation trend of sintering experiments.It verifies the correctness of the simulation.Using the simulation program and orthogonal test method,four process parameters（laser power,scan spacing,scan speed and preheating temperature）are optimized.A group of optimum process parameters was obtained.These results provide a powerful criterion to get good process parameters of SLS with important economic value and promising application.

关 键 词：激光烧结 参数优化 正交试验 耦合热应力 

分 类 号：TF124[冶金工程—粉末冶金]