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首页> 外文期刊>Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear >Study of sliding wear of the wheel flange - Rail gauge corner contact conditions: Comparative between cast and forged steel wheel materials
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Study of sliding wear of the wheel flange - Rail gauge corner contact conditions: Comparative between cast and forged steel wheel materials

机译：车轮轨道轨道轨道接触条件的滑动磨损研究：铸造钢轮材料的比较

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摘要

Wheel-rail contact is in the spotlight of Railway Engineering and its specific conditions are highly dependent on railroad characteristics, such as load, speed, track design and materials used, among others. To understand wear mechanisms for typical contact conditions of a railroad with many tight curves, sliding-wear tests were performed on pin-on-disc configuration, without lubrication, at various sliding speeds and constant normal load. The pins and discs were machined from rail and wheel materials, respectively. The worn volume of the samples were obtained by optical microscopy and 3D profilometry and the wear mechanisms were analyzed using a scanning electron microscope. The results indicate a higher friction coefficient for tests at a speed of 0.9 m/s, at about 0.8, when compared to the values obtained at 0.1 m/s - between 0.5 and 0.6. The wear severity of both pins and discs were up to four times higher in the tests carried out with a sliding speed of 0.1 m/s. Comparing the different materials of the discs, the wear of pins and discs were considerably greater in tribosystems with forged steel discs - about two to three times the wear. The wear mechanisms observed were predominantly of plastic nature, with occurrence of ploughing and adhesion of oxidized materials on the surface of pins and discs.
机译：轮轨接触处于铁路工程的聚光灯，其特定条件高度依赖于铁路特性，例如负载，速度，轨道设计和使用的材料等。要了解具有许多紧密曲线的铁路的典型接触条件的磨损机制，在不同滑动速度和恒定的正常负载下，在没有润滑的情况下进行滑动磨损试验。销和盘分别从轨道和轮材料加工。通过光学显微镜和3D轮廓测定获得的样品的磨损体积，并且使用扫描电子显微镜分析磨损机构。结果表明，与在0.1m / s的值相比，在0.9m / s的速度下以0.9m / s的速度表示较高的摩擦系数。销钉和盘的磨损严重程度在测试中的滑动速度为0.1米/秒的试验中的耐磨性高达四倍。比较光盘的不同材料，在具有锻造钢盘的摩擦系统中，销钉和盘的磨损相当大 - 磨损约两到三倍。观察到的磨损机制主要是塑料性质，随着销和盘表面上的氧化材料的发生和粘附。

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