HVOF喷涂WC-12Co涂层及其摩擦磨损性能研究  

Wear Resistance of WC-12Co Coating Prepared by High Velocity Oxygen Fuel Spraying

作　　者：吴旭[1] 郭志猛[1] 于继平[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]中航工业西安航空发动机(集团)有限公司研制中心,陕西西安710021

出　　处：《粉末冶金工业》2014年第4期31-34,共4页Powder Metallurgy Industry

基　　金：广东省产学研重大专项(2009A09010008)

摘　　要：采用超音速火焰喷涂技术制备了WC-12Co涂层,利用IA32定量分析软件、LM700AT自动显微硬度测试仪、万能试验机等设备测量涂层的孔隙率、显微硬度以及涂层与基体的结合强度,并通过MRH-3高速环块磨损试验机测定了涂层的摩擦磨损性能。结果表明:所制备涂层的孔隙率为0.33%,显微硬度为1393HV,涂层与基体的结合强度不低于64.4MPa;在长城CJ-4 15W/40柴油机油润滑下,采用GCr15为对偶件,试验载荷800N,转速1 000 r/min,试验时间1 h,涂层的摩擦系数稳定在0.099,磨损量为0.001 6 g,磨损机制为磨粒磨损。WC-12Co coating was prepared by high velocity oxygen fuel （HVOF） spraying technology. The coating porosity, micro-hardness and the bonding strength between the substrate and coating were measured by IA32 quantitative analysis software, LM700AT automatic micro-hardness tester and universal testing machine, respectively. In addition, the tribological properties of the coating were tested on MRH-3 high-speed ring-on-block machines. The results show that the coating porosity is 0.33%, the micro-hardness is 1 393 HV, and the coating adhesive strength is higher than 64.4 MPa. With the test load of 800 N, the rotate speed of I 000 r/min, the friction pair of GCrl 5, the experimental period of 1 h and the Great Wall C J-4 15W/40 as lubricating oil, the friction coefficient of the coating remains at 0.099, the weight loss of the coating is 0.001 6 g. The wear mechanism is abrasive wear.

关 键 词：HVOF WC-12CO 耐磨涂层 

分 类 号：TG174.4[金属学及工艺—金属表面处理]