WC含量对定向结构Ni60涂层微观组织及其摩擦性能的影响  

Effect of WC content on microstructure and fribological properties of directional Ni60 coating

作　　者：殷翔 马成燕 周凯 王新民 王毅 魏亨利 YIN Xiang;MA Cheng-yan;ZHOU Kai;WANG Xin-min;WANG Yi;WEI Heng-li(Gansu Construction Investment Lanzhou New Area Construction Management Co,Ltd.,Lanzhou 730087,China;College of Materials Science and Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]甘肃建投兰州新区建设管理有限公司,甘肃兰州730087 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2023年第4期17-23,共7页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(20JR5RA471)。

摘　　要：采用火焰喷涂和感应重熔+强制冷却复合技术在45钢基体上制备了Ni60/WC定向结构涂层,研究了不同WC质量分数(5%、20%、35%、50%)对定向结构涂层微观组织、硬度和摩擦磨损性能的影响.结果表明:随着WC质量分数的增加,定向结构涂层中靠近界面处的枝晶表现为合并择优生长的趋势;定向结构涂层内的各类硬质相填充于晶界,起到了强化晶界的作用.涂层的硬度随着WC质量分数增加呈现正相关上升趋势,涂层的摩擦系数与磨损率随着涂层中WC质量分数的增加先减小后增大.Ni60/WC directional coatings were prepared on 45 steel substrate by flame spraying and induction remelting+forced cooling.The effects of WC mass-fraction(5%,20%,35%,50%)were investigated on microstructure,hardness and tribological properties of directional coatings.The results showed that the dendrites near the interface of the directional coating show a trend of combined preferential growth with the increase of WC mass-fraction.All kinds of hard phases in the directional coating are evenly distributed in the grain boundaries,which plays a role in strengthening the grain boundaries.The hardness of coating showed a positive correlation with the WC mass-fraction,and friction coefficient and wear rate of directional structure coating first decrease and then increase with the increase of WC mass-fraction.

关 键 词：NI60合金 WC颗粒 微观结构演变 显微硬度 摩擦磨损性能 

分 类 号：TG149[一般工业技术—材料科学与工程]