工艺参数对选区激光熔化中成形形变的影响  

Effect of Process Parameters on the Deformation of Selective Laser Melting

作　　者：吴懋亮 孙翰霆 孙玄锴 刘中俊 李汝润 Wu Maoliang;Sun Hanting;Sun Xuankai;Liu Zhongjun;Li Rurun(College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学能源与机械工程学院,上海200090

出　　处：《激光与光电子学进展》2020年第5期166-171,共6页Laser & Optoelectronics Progress

摘　　要：对采用选区激光熔化(SLM)技术打印316L不锈钢进行数值模拟,并研究了零件在水平面内的摆放角度和竖直面内的倾斜角度对SLM过程热力行为的影响。研究结果表明:对尺寸为50mm×5mm×10mm的长条形加工零件采用短直线的扫描策略,在零件摆放的水平面内,当长边与刮刀之间的夹角为45°时,由热应力产生的形变量最小;在竖直面内,零件与垂直方向的夹角为15°时产生的形变量最小;零件在基板上和取下后的形变量会产生较大的差异,取下后形变量将增大70%左右。Numerical simulations on 316 L stainless steel is conducted using selective laser melting(SLM)technology,and the effects of the placement angle of the printed parts in the horizontal plane and the inclination angle in the vertical plane on the thermal behavior of the SLM process are investigated.By adopting the short straight-line scanning strategy,the research results show that for a bar with dimensions of 50 mm ×5 mm ×10 mm,when the angle between the longer side of the bar and the scraper is 45°,the deformation generated by thermal stress is the smallest.In the vertical plane,the corresponding deformation generated when the angle between the bar and the vertical direction is 15°is the smallest as well.The deformations on the substrate prior and subsequent to the removal exist a considerable difference,which amounted to approximately 70%.

关 键 词：激光光学 选区激光熔化 热力场 倾角 形变 

分 类 号：TG655[金属学及工艺—金属切削加工及机床] TG142.33[一般工业技术—材料科学与工程]