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TA15 钛合金选区激光熔化成形工艺研究
Effect of Processing Parameters on Selective Laser Melting of TA15 Titanium Alloy
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- DOI:
- 作者:
- 张 丹，王 猛，李闯闯
ZHANG Dan, WANG Meng, LI Chuangchuang
- 作者单位:
- 西北工业大学 凝固技术国家重点实验室 金属高性能增材制造与创新设计工业和信息化部重点实验室
State Key Laboratory of Solidification Processing, MIIT Key Laboratory of High Performance Metal Additive Manufacture and Innovative Design, Northwestern Polytechnical University
- 关键词:
- 选区激光熔化； TA15 钛合金；成形参数；致密度
selective laser melting; TA15 titanium alloy; processing parameter; relative density
- 摘要:
- 采用选区激光熔化技术增材制造了 TA15 钛合金。 结果表明，随着激光功率、激光扫描速率、扫描道间距的增加， TA15 试样的致密度均呈显先增大后减小的趋势；作用于粉床的激光能量密度是一个较好的工艺参数判据，低能量密度下，由于粉末不能完全熔化通常会出现不规则熔合不良型孔洞；高能量密度下因气体析出和裹陷而出现圆形气孔；在 60~127 J/mm 3 的中等能量密度下可得到致密度不低于 99.15% 的 TA15 试样。
TA15 titanium alloy were produced by additive manufacturing of selective leaser melting technique. The results show that with the increase of laser power, laser scanning rate and scanning channel spacing, the density of TA15 samples increases first and then decreases. The laser energy density acting on the powder bed is a good criterion for the process parameters. At low energy density, the powder can't completely melt, and irregular mal-fusion pores usually appear. At high energy density, circular pores appear due to gas precipitation and entrapment. At a medium energy density of 60~127 J/mm 3 , TA15 samples with a density not less than 99.15% can be obtained.