高铬白口铸铁低速重载条件下的干滑动摩擦磨损特性  

Wear Characteristics of High Chromium White Cast Iron under Heavy Load and Low Speed Dry Sliding Friction

作　　者：倪锋[1] 张永振[1] 罗霞[1] 沈百令[1] 龙锐[1] 

机构地区：[1]洛阳工学院材料科学与工程系,河南洛阳471039

出　　处：《钢铁研究学报》2002年第3期52-55,共4页Journal of Iron and Steel Research

基　　金：河南省自然科学基金资助项目 (9940 40 5 0 0 )

摘　　要：研究了不同类型碳化物和不同基体组织的高铬白口铸铁在低速 (滑动速度为 0 .4 187～1.0 4 6 7m / s)、重载 (接触应力为 1～ 2 1MPa)条件下与淬火 4 0 Cr钢 (硬度 HRC 5 1～ 5 3)配副的干滑动摩擦磨损特性。结果表明 ,在 (Fe,Cr) 7C3、(Fe,Cr) 3C和 (Fe,Cr) 2 3C6 3种碳化物中 ,(Fe,Cr) 7C3有利于提高高铬白口铸铁的耐磨性 ,(Fe,Cr) 3C有利于降低摩擦系数 ;共析组织、奥氏体和马氏体 3种基体相比 ,共析组织基体使合金具有较高的摩擦系数 ,而奥氏体基体合金的耐磨性最好。存在一个临界摩擦应力 ,当摩擦应力大于此值时 。The wear characteristics of high chromium white cast iron and quenched 40Cr steel (HRC 51 53) were investigated under heavy load (1 21 MPa) and low speed (0.418 7 1.046 7 m/s) dry sliding friction. The high chromium white cast iron with three kinds of carbides and three kinds of matrix was tested. The results indicated that (Fe,Cr) 7C 3 is favorable to wear resistance and (Fe,Cr) 3C can lower the friction factor. The alloy with eutectoid matrix gives high friction factor and that with austenite has the best wear resistance. There is a critical friction stress, over which the wear rate rises quickly.

关 键 词：高铬白口铸铁 干滑动 摩擦系数 耐磨性 临界摩擦应力 

分 类 号：TG143.1[一般工业技术—材料科学与工程] TG115.58[金属学及工艺—金属材料]