45钢表面激光重熔纳米晶镍镀层组织与性能研究  

Study on Microstructure and Performance of Nano-crystalline Nickel Coating on 45 Steel Surface by Laser Remelting

作　　者：陈劲松[1] 乔斌[1] 杨建明[1] 贺毅强[1] 

机构地区：[1]淮海工学院机械工程学院,江苏连云港222005

出　　处：《热加工工艺》2010年第24期176-178,253,共4页Hot Working Technology

基　　金：淮海工学院自然科学基金资助项目(Z2009003);江苏省高校自然科学研究资助项目(09KJD430001)

摘　　要：采用喷射电镀在45钢表面制备了纳米晶镍镀层,并对其进行了激光重熔处理。分析了纳米晶镀层和激光重熔层的微观组织,测试了重熔层的显微硬度及耐腐蚀性能。结果表明:喷射电镀制备的镀层组织属于纳米晶范畴,激光重熔层与基体为冶金结合,内部组织由大量的枝晶和等轴晶构成;重熔层的硬度和耐腐蚀性明显提高。Nano-crystalline nickel coating was prepared on the surface of 45 steel using jet-electroplating technology,then the coating was processed by laser remelting.The microstructure,microhardness and corrosion resistance of the laser remelting coating were analyzed and measured.The results show that the grain size of the nickel deposition is below 100 nm,the formed coating is metallurgically bonded with substrate;the interior structure consists of lots of dendritic and isometeric crystal.After laser remelting,the hardness and corrosion resistance of the coating increase obviously.

关 键 词：激光重熔 纳米晶镍 喷射电镀 显微硬度 耐腐蚀性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]