激光选区熔化成形LaB_(6)增强316L不锈钢的组织及力学性能  

Microstructure and Mechanical Properties of 316L Stainless Steel Reinforced by Lanthanum Hexaborate Through Selective Laser Melting

作　　者：蒋佳斌 谢德巧 周凯 肖猛 田宗军[1] 沈理达[1] 赵剑峰[1] JIANG Jiabin;XIE Deqiao;ZHOU Kai;XIAO Meng;TIAN Zongjun;SHEN Lida;ZHAO Jianfeng(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;College of Energy and Power,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;Nanjing Institute of Advanced Laser Technology,Nanjing 210046,China)

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]南京航空航天大学能源与动力学院,南京210016 [3]南京先进激光技术研究院,南京210046

出　　处：《南京航空航天大学学报》2021年第1期85-92,共8页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家重点研发计划(2018YFB1105400,2018YFB1105801)资助项目;国家自然科学基金(51475238,U1537105)资助项目;江苏省重点研发计划(BE2019002)资助项目;南京航空航天大学研究生教育教学改革研究项目“3D打印+仿生机器人研究生协同培养探索”(2018YJXGG11)资助项目。

摘　　要：为进一步提高激光选区熔化成形316L不锈钢制件的力学性能,在316L不锈钢粉末中添加LaB_(6)稀土材料,分析其对成形样件显微组织、显微硬度、拉伸性能和耐磨性能的影响。结果表明:微量添加LaB_(6)的316L不锈钢材料其激光选区熔化(Selective laser melting,SLM)成形工艺窗口发生了偏移,在获取同等致密度制件的条件下可进一步降低激光功率密度;添加的LaB_(6)稀土材料改变了316L材料熔池的熔凝行为,致平均结晶晶粒细化,显微硬度、拉伸强度、屈服强度和耐磨性能得到提高。In order to further improve the mechanical properties of 316L stainless steel parts formed by laser selective melting,316L stainless steel powder was added with LaB_(6) rare earth material,and its influence on the microstructure,microhardness,tensile properties and wear resistance of the formed samples was analyzed.The results show that:The selective laser melting(SLM)forming process window of 316L stainless steel with a small amount of LaB_(6) added is offset,and the laser power density could be further reduced when the same dense parts are obtained;the added LaB_(6) rare earth material changes the melting behavior of 316L material molten pool,refines the average crystal grains,and improves the microhardness,tensile strength,yield strength and wear resistance.

关 键 词：激光选区熔化 六硼化镧 不锈钢 显微组织 力学性能 

分 类 号：TN142[电子电信—物理电子学]