摘要
为了揭示激光选区熔化成形过程中熔池行为,以316不锈钢粉末为对象展开激光选区熔化试验,研究了激光选区熔化成形时不同的扫描方式对成形件内部缺陷、微观组织以及室温拉伸性能的影响。结果表明:将层片分区短线扫描成形可以有效地控制成形零件内部的气孔缺陷;与无分区长线扫描相比,采用分区短线扫描后零件内部组织呈现明显的柱状且晶粒尺寸较大。
In order to disclose the behavior of molten pool during the Selective Laser Melting（SLM） process, this paper focus on effects of scanning patterns on the defects and microstructure of 316 stainless steel fabricated by SLM. The results show that dividing the part area in small rectangular sectors decreased pores defects in the parts fabricated by SLM. At the same time, the microstructure of 316 stainless steel is typical cylindrical crystal and have larger size in parts fabricated by dividing the part area in small rectangular sectors.
出处
《航空制造技术》
2016年第1期124-127,共4页
Aeronautical Manufacturing Technology
关键词
激光选区熔化
增材制造
扫描方式
缺陷
微观组织
Selective Laser Melting（SLM）
Additive manufacturing
Scanning patterns
Defects
Microstructure
