45钢表面激光熔覆MoB/CoCr金属陶瓷覆层的组织与性能  

Microstructure and properties of MoB/CoCr cermet coating on 45steel prepared by laser cladding

作　　者：陈枭[1] 纪岗昌[1] 王洪涛[1] 白小波[1] 于福义[1] 

机构地区：[1]九江学院机械与材料工程学院,江西九江332005

出　　处：《材料热处理学报》2012年第10期111-115,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金项目(50961007);江西省自然科学基金项目(2010GQC0117);江西省教育厅科技项目(GJJ12622;GJJ11236)

摘　　要：采用激光熔覆技术在45钢基体表面熔覆MoB/CoCr金属陶瓷覆层,对MoB/CoCr覆层进行X射线衍射(XRD)、扫描电镜(SEM)、能谱(EDS)的微观组织结构分析和对覆层的硬度进行测试。结果表明:熔覆层组织致密,与基体结合牢固且呈冶金结合;熔覆层的主要物相为CoMo2B2和CoMoB,主要的化学成分是Mo、Cr和Co,合金化区中Fe元素的含量明显增加。硬度测试表明熔覆层的硬度值是45钢硬度值的10倍以上。MoB/CoCr cermet coating was prepared on 45 steel surface by laser cladding. Microstructure of MoB/CoCr coating was characterized by XRD, SEM and EDS,and mierohardness of the coating was also studied. The results show that MoB/CoCr cermet coating with metallurgical bonding to substrate is dense. The main phases of the cladding layer are CoMo2B2and CoMoB, and its main chemical composition is Mo, Cr and Co, the content of Fe increases obviously in the alloying zone of the cladding layer. The hardness of the cladding layer is much higher than that of the substrate.

关 键 词：MoB/CoCr 激光熔覆 金属陶瓷 45钢 硬度 

分 类 号：TG174.4[金属学及工艺—金属表面处理]