奥氏体不锈钢表面的激光冲击强化  

Surface strengthening of austenitic stainless steel by laser shock peening

作　　者：段水旺[1] 曾鹏[1] 崔文辉 梁亦佳 黄星朗 DUAN Shui-wang;ZENG Peng;CUI Wen-hui;LIANG Yi-jia;HUANG Xing-lang(Institute of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《电镀与涂饰》2018年第17期773-776,共4页Electroplating & Finishing

摘　　要：在不同功率密度下用激光冲击方法对304奥氏体不锈钢表面进行强化,利用X射线衍射仪、扫描电镜和显微硬度计表征了不锈钢的表面组织和性能。激光冲击令奥氏体不锈钢表面形成了约80μm厚的硬化层,显微硬度从基体的160 HV提高到214 HV,同时形变过程会发生奥氏体向马氏体的转变。The surface of 304 austenitic stainless steel was strengthened by laser shock peening at different power densities.The surface microstructure and properties of the stainless steel were characterized using X-ray diffractometer,scanning electron microscope,and microhardness tester.A hardened layer of about 80μm in thickness was formed on the surface of austenitic stainless steel,having a microhardness of 214 HV which is higher than that of the substrate(160 HV).The deformation process leads to a phase transformation from austenite to martensite.

关 键 词：奥氏体不锈钢 激光冲击 表面强化 马氏体 相变 显微硬度 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]