根据赫兹接触理论,使用MMS-2A微机控制摩擦磨损试验机对3种含碳量不同的车轮材料分别与U71Mn热轧钢轨进行匹配试验,研究其磨损与接触疲劳性能并进行微观形貌分析。结果表明:车轮钢材料的耐磨性与硬度成正比;随着轮轨材料硬度比增大,磨损机制由黏粘着和疲劳磨损转变为磨粒磨损。
According to Hertz contact theory,matching tests between three kinds of wheel materials and U71Mn were performed using a MMS-2A friction and wear testing machine.The wear and contact fatigue properties were studied and the micro-morphology was analyzed.The results show that the abrasion resistance of wheel steel is proportional to the hardness of the materials.As hardness ratio between wheel and rail increases,the abrasion mechanism transforms from adhesion and fatigue wear to abrasive wear.