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首页> 美国卫生研究院文献>Materials >Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions
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Wear Behavior of Ductile Iron Wheel Material Used for Rail-Transit Vehicles under Dry Sliding Conditions

机译：干滑条件下用于轨道交通车辆的球墨铸铁轮材料的磨损行为

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摘要

A ductile iron wheel used for a rail-transit vehicle was treated with a recommended heat-treatment process. The ductile iron wheel after heat treatment was composed of graphite nodules and tempered sorbite with an area fraction of 98%. A friction test of the ductile iron and carbon steel wheel materials was systematically performed under different normal loads and sliding velocities. The results indicated that the wear mechanism of the ductile iron wheel changed from adhesion to abrasion with an increase in the normal load level. Adhesion was the main wear mechanism at different sliding velocities and normal load level. The impact of the normal load on the wear mechanism was greater than that of the sliding velocity. Since the ductile iron wheel material had excellent thermal property and higher carbon content, it exhibited a lower wear rate, a smaller difference value of the friction coefficient, and plastic deformation on the worn surface than those of the carbon steel wheel material. This indicates that ductile iron wheels may have a longer wear life, greater traction, and higher stability during operation than carbon steel wheels. The iron wheels have the potential for being applied in rail-transit vehicles.
机译：对轨道交通车辆用的球墨铸铁轮进行了推荐的热处理工艺处理。热处理后的球墨铸铁轮由石墨块和回火率高的索氏体组成，面积分数为98％。在不同的法向载荷和滑动速度下，系统地进行了球墨铸铁和碳钢车轮材料的摩擦测试。结果表明，随着正常载荷水平的增加，球墨铸铁轮的磨损机理从粘附性变为磨损。在不同的滑动速度和正常载荷水平下，粘附力是主要的磨损机理。法向载荷对磨损机理的影响大于滑动速度的影响。球墨铸铁轮毂材料具有优异的热性能和较高的碳含量，因此与碳钢轮毂材料相比，具有较低的磨损率，较小的摩擦系数差值和在磨损表面的塑性变形。这表明，与碳钢轮相比，球墨铸铁轮在运行过程中可能具有更长的磨损寿命，更大的牵引力和更高的稳定性。铁轮有潜力应用于轨道交通车辆中。

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