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首页> 外文期刊>Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear >The influence of microstructure on the rolling contact fatigue of steel for high-speed-train wheel
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The influence of microstructure on the rolling contact fatigue of steel for high-speed-train wheel

机译：显微组织对高速列车车轮钢滚动接触疲劳的影响

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摘要

Rolling contact fatigue (RCF) is an important concern for the durability of railroad wheels and rails, especially when considering high-speed trains. In this work, the effect of microstructures on the RCF of high-speed-railway was studied under a simulated train speed of 500 km/h. Two different carbon steel microstructures: spheroidized pearlite and lamellar pearlite, were achieved by different heat treatment. Results of rolling contact fatigue test demonstrated that the fatigue resistance of lamellar steel considerably exceeds that of spheroidized steel. The lamellar steel presented a more fragmentary surface but lower weight loss during the entire fatigue tests. Analysis of cross-section profiles of worn specimens suggests that cracks propagated near the surface of lamellar steel and may strengthen the fatigue resistance of the steel. Based on micro-indentation hardness data, it is suggested that greater energy dissipation induced by larger plastic deformation may also improve RCF resistance. (C) 2015 Elsevier B.V. All rights reserved.
机译：滚动接触疲劳（RCF）是铁路车轮和轨道耐久性的重要考虑因素，尤其是在考虑高速列车时。在这项工作中，研究了在500 km / h的模拟火车速度下微观结构对高速铁路RCF的影响。通过不同的热处理获得了两种不同的碳钢微结构：球形珠光体和层状珠光体。滚动接触疲劳试验的结果表明，层状钢的抗疲劳性大大超过了球化钢。在整个疲劳测试过程中，层状钢的表面更为零散，但重量损失较低。磨损试样横截面轮廓的分析表明，裂纹扩展到层状钢的表面附近，并可能增强钢的疲劳强度。根据微压痕硬度数据，建议更大的塑性变形导致更大的能量耗散也可以提高RCF抵抗力。 （C）2015 Elsevier B.V.保留所有权利。

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