钽的激光选区熔化成形工艺研究

钽的激光选区熔化成形工艺研究 Study on selective laser melting process of tantalum 陈艳 CHEN Yan 1 first-author 王飞 WANG Fei 1 孙靖 SUN Jing 1 陈裕梁 CHEN Yuliang 1 张骏 ZHANG Jun 1 上海航天设备制造总厂有限公司 上海航天设备制造总厂有限公司 Shanghai Aerospace Equipments Manufacturer Co.,Ltd. Shanghai Aerospace Equipments Manufacturer Co.,Ltd. 通过一系列实验探究难熔金属钽的激光选区熔化(Selective Laser Melting,SLM)成形工艺,分别选取不同激光功率、扫描速度和扫描间距,进行了单道实验、单层实验以及块体实验。结果表明,SLM成形钽最优工艺参数为激光功率300 W,扫描速度50 mm/s。针对SLM过程中钽层出现不同程度的开裂现象,从热传导及激光选区熔化过程中产生内应力累积方面对钽层开裂的原因进行了定性分析。最终成功制备得钽块体,并采用扫描电子显微镜(SEM)及X射线散射谱(EDX)对SLM成形钽的微观组织及成分分布进行表征。 A series experiments are conducted to study the selective laser melting（SLM） process of refractory metal tantalum. The single pass,single layer and bulk experiments with different laser powers,scanning speeds and scanning spaces are explored. The experimental results show that the optimum SLM parameters for tantalum are laser power of 300 W and scanning speed of 50 mm/s. According to the different degrees of cracking on the tantalum layers,the heat conduction and the accumulation of internal stress in SLM process are analyzed qualitatively. Finally the cubic tantalum is successfully fabricated and its microstructure and component distribution is characterized by SEM and EDX. 激光选区熔化 钽 变形开裂 层间脱落 热传导 selective laser melting tantalum deformation and cracking interlayer separation heat conduction TG665 2022-03-08 5 51