Characteristics of Dry Sliding Friction and Wear of Unidirectional Solidification High Chromium White Cast Iron
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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。Abstract: 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.
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