激光表面强化316L不锈钢的组织与性能研究  

Microstructures and Properties of Laser Surface-Reinforced 316L Stainless Steel

作　　者：李鸿鹏 盛金马 黎彬 常江 张玉娇 Li Hongpeng;Sheng Jinma;Li Bin;Chang Jiang;Zhang Yujiao(State Grid Anhui Electric Power Co.,Ltd.Economic Technology Research Institute,Hefei,Anhui 230071,China;Hefei Innovation Research Institute,Beihang University,Hefei,Anhui 230012,China)

机构地区：[1]国网安徽省电力有限公司经济技术研究院,安徽合肥230071 [2]北京航空航天大学合肥创新研究院,安徽合肥230012

出　　处：《激光与光电子学进展》2020年第19期191-196,共6页Laser & Optoelectronics Progress

摘　　要：研究了纳秒脉冲光纤激光表面重熔对316L不锈钢组织、力学性能和耐磨性能的影响,分别采用三维激光扫描共聚焦显微镜、金相显微镜和扫描电子显微镜表征了重熔前后不锈钢的表面形貌、显微组织、拉伸断口形貌与摩擦磨损形貌。结果表明:重熔层从底部到表层可分为平面晶区、枝晶生长区和表面等轴晶区,激光重熔处理可将316L不锈钢的抗拉强度从580 MPa提高到710 MPa,不锈钢的表面硬度和耐磨性能也因此得到了显著提高。Effects of nanosecond pulsed fiber laser surface remelting on the microstructure,mechanical properties,and wear-resistance of 316L stainless steel were investigated.Three-dimensional laser scanning confocal microscopy,optical microscopy,and scanning electron microscopy were used to characterize the surface morphologies,microstructures,tensile fracture morphologies,and wear morphologies of the stainless steel before and after remelting.The results show that the remelting layer can be divided into a planar crystal zone,a dendrite growth zone,and an isometric zone from the bottom to the surface.Laser remelting can increase the tensile strength of 316L stainless steel from 580 MPa to 710 MPa,significantly increasing the microhardness and wear resistance of the stainless steel.

关 键 词：激光技术 激光重熔 316L不锈钢 显微组织 力学性能 

分 类 号：TG17[金属学及工艺—金属表面处理]