| 50 kg/m钢轨踏面掉块缺陷分析 |
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| 引用本文： | 任安超,周桂峰,吉玉,张友登,朱敏,罗德信. 50 kg/m钢轨踏面掉块缺陷分析[J]. 钢铁, 2009, 44(1): 91-0 |
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| 作者姓名： | 任安超 周桂峰 吉玉 张友登 朱敏 罗德信 |
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| 作者单位： | 1武汉钢铁（集团）公司研究院工艺技术研究所， 湖北 武汉 430080; 2武汉科技大学材料与冶金学院， 湖北 武汉 430081 |
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| 摘 要： | 50 kg/m钢轨在使用一段时间后踏面出现掉块缺陷。采用光学显微镜、图像仪和低倍检验等方法对钢轨踏面掉块缺陷产生的机理进行了分析和研究。结果表明，掉块缺陷的形成是由于钢轨滚动接触疲劳伤损所致。改善轮轨接触方式，减少钢轨踏面的轮轨接触应力，可以减缓曲线钢轨踏面压溃、剥离裂纹和浅层状剥离掉块伤损的出现，通过对钢轨进行及时的预防性打磨，是预防和减轻滚动接触疲劳伤损的最有效方法。
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| 关 键 词： | 钢轨 掉块 滚动接触疲劳 |
Analysis on Swap Block on Tread of 50 kg/m Rail |
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| REN An-chao,ZHOU Gui-feng,JI Yu,ZHANG You-deng,ZHU Min,LUO De-xin. Analysis on Swap Block on Tread of 50 kg/m Rail[J]. Iron & Steel, 2009, 44(1): 91-0 |
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| Authors: | REN An-chao ZHOU Gui-feng JI Yu ZHANG You-deng ZHU Min LUO De-xin |
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| Affiliation: | 1Process Technology Institute, Research and Development Center of Wuhan Iron and Steel (Group) Corp., Wuhan 430080, Hubei, China;2Institute of Material Science and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China |
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| Abstract: | While 50 kg/m rail was used for a period of time,on the tread of rail swap block could be found.Defects were analyzed by optical macroscopy.The result shows that rolling contact fatigue failures caused swap block defects of rail.The improvement in wheel track contact mode and redution of contact stress between rail tread and the wheel might slow down rail tread bruising,the peeling cracking,shallow layered strips swap block.The preventive rail polishing is the most effective countermeasure. |
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| Keywords: | rail swap block RFC |
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