定向凝固高铬白口铸铁干滑动摩擦磨损特性  

Characteristics of Dry Sliding Friction and Wear of Unidirectional Solidification High Chromium White Cast Iron

作　　者：倪锋[1] 罗霞[1] 黄树锋[1] 陈跃[1] 沈百令[1] 

机构地区：[1]洛阳工学院材料科学与工程系,洛阳471039

出　　处：《材料开发与应用》2002年第3期1-5,24,共6页Development and Application of Materials

基　　金：河南省自然科学基金资助项目 :9940 40 5 0 0

摘　　要：研究了定向凝固高铬白口铸铁与淬火 40Cr钢 (硬度HRC5 1～ 5 3 )配副时碳化物纤维排列不同位向的干摩擦磨损特性。结果表明 ,碳化物纤维排列不同位向的相对耐磨性随摩擦功率而变化。摩擦功率低于某一临界值时 ,碳化物纤维垂直位向的磨损率较其它位向的低 ;摩擦功率高于该临界值时 ,碳化物纤维垂直位向的磨损率反而高于其它位向的。该临界值的高低与基体组织有关 ,奥氏体基体时最高。摩擦系数与碳化物纤维排列位向无关。The characteristics of dry sliding friction and wear of unidirectional solidification high chromium white cast iron are investigated with quenching 40Cr steel(HRC51～53) . The anisotropy of carbide fibre is considered. The experiment results indicate that the wear anisotropy changes with friction power. The wear rate of cross section of carbide fibre is lower than that of longitudinal section when friction power is lower than a critical value,but the wear rate of cross section of carbide fibre is higher than that of longitudinal section when friction power is higher than the critical value. The critical friction power changes with the matrix structure and that with austenite is the highest. The friction factor is not related to the anisotropy of carbide fibre.

关 键 词：摩擦磨损特性 高铬白口铸铁 定向凝固 碳化物 排列位向 干滑动 耐磨性 摩擦系数 

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]