HVOF喷涂WC-10Co4Cr涂层的性能及滑动磨损机理  

Properties and Sliding Wear Mechanism of WC-10Co4Cr Coating Prepared by HVOF

作　　者：陈小明[1,2] 周夏凉[1,2] 吴燕明[1,2] 伏利 赵坚 王莉容[1] 毛鹏展[1] 赵鹏 马红海 

机构地区：[1]水利部产品质量标准研究所,杭州310012 [2]水利机械及其再制造技术浙江省工程实验室,杭州310012 [3]浙江省水利水电装备表面工程技术研究重点实验室,杭州310012

出　　处：《表面技术》2017年第3期119-123,共5页Surface Technology

基　　金：浙江省科技计划项目(2014C31156);浙江省科学计划项目(2013C31044)~~

摘　　要：目的研究WC-10Co4Cr涂层的耐滑动磨损性能及机理。方法在0Cr13Ni5Mo不锈钢基体上,采用超音速火焰喷涂(HVOF)制备了WC-10Co4Cr金属陶瓷涂层。分析了WC-10Co4Cr涂层的物相组成、显微组织,并测试了其硬度、结合强度、孔隙率及在560 r/min和1120 r/min转速下的滑动磨损性能。结果涂层的显微硬度为1325HV0.2,结合强度为72 MPa。涂层组织致密,孔隙率为0.76%。在560 r/min下磨损10h,涂层与基体的磨损失重比为1:138.36;在1120 r/min下磨损10 h,涂层与基体的磨损失重比为1:127.44。结论在滑动摩擦磨损的初期,涂层的磨损失效机制主要表现为磨粒磨损。随着滑动速度的增大,涂层的磨损失效机制主要表现为疲劳磨损。The work aims to study sliding wear resistance and wear mechanism of WC-10Co4Cr coating.WC-10Co4Cr metal ceramic coating was prepared on 0Cr13Ni5 Mo stainless steel by using HVOF.Phase composition and microstructure of the coating were characterized.The micro-hardness,bond strength,porosity,sliding wear at 560 r/min and 1120 r/min were tested.Average micro-hardness was 1325Hv0.2,bond strength 72 MPa,porosity 0.76%,weight loss ratio 1：138.36 after continuous wear for 10 h at 560 r/min,1：127.44 after continuous wear for 10 h at 1120 r/min.At the beginning of sliding wear,wear failure mechanism of the coating is mainly present as abrasive wear.With the increase of sliding velocity,the wear failure mechanism is mainly present as fatigue wear.

关 键 词：超音速火焰喷涂 WC-10Co4Cr涂层 显微硬度 耐磨性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理]