干摩擦条件下SiC/MoSi_2与WC-Co对磨时的磨损特性研究  

Research on wear properties of SiC/MoSi_2 composites against WC-Co under dry friction condition

作　　者：席俊杰[1] 吴中[2] 

机构地区：[1]郑州航空工业管理学院机电工程学院,郑州450015 [2]新乡学院机电工程学院,河南新乡453003

出　　处：《粉末冶金技术》2010年第4期243-247,265,共6页Powder Metallurgy Technology

基　　金：河南省国际合作项目(084300510087)

摘　　要：采用扫描电镜和能谱仪观察和测定了SiC/MoSi2复合材料与WC-Co对磨试样的磨损表面和磨屑的形貌及成分,研究了SiC/MoSi2复合材料与WC-Co摩擦副的干摩擦磨损性能和磨损机理。研究结果表明:SiC/MoSi2复合材料与WC-Co摩擦副的主要磨损机制在初始磨损阶段主要由微观断裂机制控制,并伴有粘着磨损、磨粒磨损和氧化磨损;在稳定磨损阶段由粘着磨损机制控制,并伴有微观断裂和氧化磨损。SiC/MoSi2复合材料与硬度较大的WC-Co磨轮对磨时的磨损率比与硬度较小的CrWMn钢磨轮对磨时的磨损率低。Appearance and composition of wear surface and wear debris of SiC/MoSi2 composites rabbing against WC-Co were observed and determined by means of SEM and EDS.The dry friction and wear properties and wear mechanism of SiC/MoSi2 composites rabbing against WC-Co were studied.The results of research show that the wear mechanism of SiC/MoSi2 composites rabbing against WC-Co is mainly microfracture companied with adhesive wear,abrasive wear and oxidation wear at the beginning of wear,and adhesive wear companied with microfracture and oxidation wear at the steady stage of wear.The wear rate of SiC/MoSi2 composites rabbing against high hardness WC-Co grinding wheel is lower than that against low hardness CrWMn grinding wheel.

关 键 词：SIC/MOSI2复合材料 WC-CO 干摩擦 磨损机理 

分 类 号：TH117.1[机械工程—机械设计及理论]