激光选区熔化316L不锈钢激光冲击强化后处理工艺研究  

The research of Laser Shock Peening as the Post-Processing Technique on 316L Stainless Steel Manufactured by Laser Selective Melting

作　　者：王浩 陆越 白涌滔 Wang Hao;Lu Yue;Bai Yongtao(Shanghai Engineering Research Center of Laser Intelligent Manufacturing,Shanghai Institute of Laser Technology Co.,Ltd.,Shanghai 200233,China;School of Civil Engineering,Chongqing University,Chongqing 400045,China)

机构地区：[1]上海市激光技术研究所有限公司,上海激光智能制造工程技术研究中心,上海200233 [2]重庆大学土木工程学院,重庆400045

出　　处：《应用激光》2024年第5期115-121,共7页Applied Laser

基　　金：上海市科技创新行动计划项目(23DZ1203104)。

摘　　要：为研究激光冲击强化对激光选区熔化增材316L不锈钢材料表面性能和机械性能影响,对激光增材316L不锈钢样件进行激光冲击强化2次和4次处理,使用数码显微镜对样件表面状态和粗糙度进行分析,利用维氏硬度计对激光冲击强化前后316L不锈钢样件的表面硬度进行显微硬度测试,利用拉伸性能测试机和疲劳寿命测试设备对样件的抗拉强度和疲劳寿命进行测试,最后使用摩擦设备对样件表面耐磨性进行测试分析。结果显示:激光冲击强化可以提升激光增材316L不锈钢的表面硬度,强化4次之后硬度提升19%。激光冲击强化对样件疲劳寿命提升明显,强化2次之后疲劳寿命提升130%。但是,激光冲击强化对316L不锈钢样件的抗拉强度和耐磨性提升效果不明显,只是小幅度优化。To study the effect of laser shock peening(LSP)on the surface properties and mechanical properties of 316Lstainless steel produced by laser selective melting(SLM),the 316Lsamples were processed by laser shock peening for 2impacts and 4impacts,after which the surface roughness of the samples were analyzed by digital microscope.The surface hardness of 316L samples with and without laser shock peening was tested by Vickers hardness tester.The tensile strength and fatigue life of the sample were tested by tensile performance testing and fatigue life testing equipment.The wear resistance of the surface of the sample was tested and analyzed by friction equipment with the help of white light interferometer and digital microscopes.The results show that the surface hardness of 316Lsamples could be increased by 19%after LSP with 4impacts.The fatigue life of the sample was significantly increased by laser shock peening,and the fatigue life was increased by 130%after laser shock peening with 2impacts.The improvement of laser shock peening on the tensile strength and wear resistance of 316Lstainless steel samples is not obvious.

关 键 词：激光选区熔化 316L不锈钢 激光冲击强化 疲劳寿命 

分 类 号：TN249[电子电信—物理电子学]