高焓等离子喷涂WC-10Co4Cr涂层的耐磨性  

Wear Resistance of High Enthalpy Plasma Sprayed WC-10Co4Cr Coating

作　　者：陈小明[1,2] 周夏凉[1,2] 吴燕明[1,2] 王亚[1] 毛鹏展[1] 王莉容[1] 

机构地区：[1]水利部产品质量标准研究所,杭州310012 [2]水利部杭州机械设计研究所,杭州310012

出　　处：《中国表面工程》2015年第6期88-95,共8页China Surface Engineering

基　　金：国际先进农业科学技术计划(948计划)(201218);浙江省科学计划项目(2014C31156);浙江省科学计划项目(2013C31044)

摘　　要：为提高马氏体不锈钢(0Cr13Ni4Mo)的表面硬度及耐磨性能,对不锈钢表面进行高焓等离子喷涂WC-10Co4Cr强化,对涂层进行组织观察和物相组成分析,并在不同温度下进行了摩擦磨损试验。研究表明:WC-10Co4Cr涂层组织致密,主要由WC物相构成,另外还有少量的W2C和Co25Cr25W8C2。在室温和高温(400℃)时,WC-10Co4Cr涂层均具有较低的摩擦因数。室温时,基体的磨损机制主要以粘着磨损和磨粒磨损为主。WC-10Co4Cr涂层其磨损机制主要以微切削为主。400℃条件下,不锈钢基体的磨损机理主要以粘着磨损和剥层为主,磨痕边缘部位主要以磨粒磨损为主。WC-10Co4Cr涂层试样的磨损机制主要以磨粒磨损为主,伴随有剥层现象出现。To improve the martensitic stainless steel （0Cr13Ni4Mo） surface hardness and wear resistance, the stainless steel was strengthened by high enthalpy plasma spraying WC-10Co4Cr coating. The microstructure and phase composi- tion of the coating were characterized. Wear tests were carried out at different temperatures. Results show that the WC- 10Co4Cr coating is density and consists mainly of WC phase, while a small amount of W2 C and Co25 Cr25 Ws C2 exists in the coat- ing. The WC-10Co4Cr coating has lower friction coefficient both at room temperature and high temperature （400℃）. At room temperature, the wear mechanism of matrix mainly includes adhesive wear and abrasive wear, and the wear mechanism of WC-10Co4Cr coating mainly includes micro-cutting. Under the condition of 400℃, Wear of stainless steel in the center grinding mark is most caused by adhesive wear and peeling, but abrasive wear in the edge area of grinding crack . The wear mechanism of WC-10Co4C sample is abrasive wear with slight peeling.

关 键 词：高焓等离子喷涂 WC-10Co4Cr 微观结构 耐磨性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理]