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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 ,磨损率急剧上升
The effects of high-chromium white cast iron with different types of carbides and different matrixes on the properties of low-speed (sliding speed of 0.1887-1.467 m / s) and heavy-load (contact stress of 1-2 MPa) Dry Sliding Friction and Wear Characteristics of 4 0 Cr Steel with Hardness HRC 5 1 ~ 5 3. The results show that (Fe, Cr) 7C3 is beneficial to improve the wear resistance of high chromium white cast iron in (Fe, Cr) 7C3, (Fe, Cr) (Fe, Cr) 3C is conducive to reduce the friction coefficient; eutectoid tissue, austenite and martensite three kinds of matrix, the eutectoid matrix so that the alloy has a higher coefficient of friction, and austenitic matrix alloy resistance Grinding the best. There is a critical frictional stress, when the frictional stress is greater than this value, the wear rate rises sharply