激光熔覆Ni基非晶复合涂层组织结构及性能研究  

Study on Microstructure and Properties of the Ni-based Amorphous Composite Coating Prepared by Laser Cladding

作　　者：李刚[1] 侯俊英[1] 刘丽[1] 水东莉[1] 唐海鹏[1] 陈永君[1] 

机构地区：[1]辽宁工程技术大学,阜新123000

出　　处：《表面技术》2010年第4期15-17,24,共4页Surface Technology

基　　金：辽宁省教育厅科技研究资助项目(2008297)

摘　　要：在45钢基体表面预涂覆Ni42Zr30Ta28合金粉末,采用DL-HL-T5000B型无氦横流CO2激光器进行激光熔覆制备非晶复合涂层。利用X射线衍射仪、金相显微镜对熔覆层进行微观组织分析,同时进行了硬度及摩擦性能测试。结果表明:熔覆层组织主要由金属间化合物(Fe7Ta3,Ni7Zr2,FeNi3,Ni3Ta等)、非晶相及纳米晶组成。当功率为3.3 kW时,熔覆层硬度达到最高,为2 954.3HK;磨损率最小,为0.571 mg/mm2。Ni42Zr30Ta28 alloy powder was pre-coated on 45 steel surface.Amorphous composite coating was prepared with DL-HL-T5000B-type cross-flow CO2 laser helium-free.The microstructure was analyzed with XRD and metallurgical microscope analysis,meanwhile the hardness and friction properties of the layers were tested.The result shows that the coating is composed of intermetallic compounds,amorphous and nanocrystals,for example,Fe7Ta3,Ni7Zr2,FeNi3,Ni3Ta etc.The hardness of cladding layer reaches the maximum at the power of 3.3 kW,which is 2 954.3HK,and the wear rate is the lowest,which is 0.571 mg/mm2.

关 键 词：激光熔覆 45钢 组织 性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]