选区激光熔化成形316L不锈钢零件中的缺陷及形成机理研究进展  

Research Progress on Defects and Forming Mechanisms of Selective Laser Melting Formed 316L Stainless Steel Parts

作　　者：丛佳琦 计云萍[1,2,3] 王磊 康学良 李一鸣[2,3] 任慧平 CONG Jiaqi;JI Yunping;WANG Lei;KANG Xueliang;LI Yiming;REN Huiping(School of Materials and Metallurgy(School of Rare Earth),Inner Mongolia University of Science and Technology,Baotou 014010,China;Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources,Inner Mongolia University of Science and Technology,Baotou 014010,China;Inner Mongolia Autonomous Region Key Laboratory of Advanced Metal Materials,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院(稀土学院),包头014010 [2]内蒙古科技大学白云鄂博共伴生矿资源高效综合利用省部共建协同创新中心,包头014010 [3]内蒙古自治区新金属材料重点实验室,包头014010

出　　处：《机械工程材料》2023年第2期1-6,共6页Materials For Mechanical Engineering

基　　金：内蒙古自然科学基金资助项目(2021MS05010)。

摘　　要：选区激光熔化(SLM)是目前应用最广泛的金属增材制造技术之一。SLM成形零件中不可避免会产生许多缺陷,包括孔隙、表层粉末球化、裂纹等;缺陷的形成不仅会影响成形过程的顺利进行,也会破坏零件内部完整性,降低零件的服役性能。对SLM成形316L不锈钢零件中孔隙、表层粉末球化、裂纹3种缺陷的主要特征进行了综述,对这3种缺陷的形成机理和影响因素进行了总结,提出了控制缺陷的主要措施,最后给出了今后的研究方向。Selective laser melting(SLM)is one of the most widely used metal additive manufacturing techniques.Many defects are inevitably produced in the SLM formed parts,including pores,surface layer powder spheroidization,cracks and so on.The formation of defects not only affect the smoothness of the forming process,but also damage the internal integrity of the part and reduce its serviceability.The main characteristics of three defects including pores,surface layer powder spheroidization and cracks in SLM formed 316L stainless steel parts are reviewed.The formation mechanisms and influencing factors of these three defects are summarised,and the main measures to control the defects are proposed.Finally,future research directions are put forword.

关 键 词：SLM技术 316L不锈钢 缺陷 形成机理 影响因素 

分 类 号：TG249.9[金属学及工艺—铸造]