ISSN   1004-0595

CN  62-1095/O4

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陈水友, 刘吉华, 郭俊, 王文健, 刘启跃. 车轮材料特性对轮轨磨损与疲劳性能影响的研究[J]. 摩擦学学报, 2015, 35(5): 531-537. DOI: 10.16078/j.tribology.2015.05.003
引用本文: 陈水友, 刘吉华, 郭俊, 王文健, 刘启跃. 车轮材料特性对轮轨磨损与疲劳性能影响的研究[J]. 摩擦学学报, 2015, 35(5): 531-537. DOI: 10.16078/j.tribology.2015.05.003
CHEN Shui-you, LIU Ji-hua, GUO Jun, WANG Wen-jian, LIU Qi-yue. Effect of Wheel Material Characteristics on Wear and Fatigue Property of Wheel-Rail[J]. TRIBOLOGY, 2015, 35(5): 531-537. DOI: 10.16078/j.tribology.2015.05.003
Citation: CHEN Shui-you, LIU Ji-hua, GUO Jun, WANG Wen-jian, LIU Qi-yue. Effect of Wheel Material Characteristics on Wear and Fatigue Property of Wheel-Rail[J]. TRIBOLOGY, 2015, 35(5): 531-537. DOI: 10.16078/j.tribology.2015.05.003

车轮材料特性对轮轨磨损与疲劳性能影响的研究

Effect of Wheel Material Characteristics on Wear and Fatigue Property of Wheel-Rail

  • 摘要: 在MMS-2A滚动摩擦磨损试验机上进行不同材料车轮与U75V热轧钢轨的匹配试验, 研究材料特性对轮轨试样磨损与疲劳性能的影响. 结果表明: 随着车轮碳含量增加, 组织中珠光体比例增加, 珠光体中渗碳体片层间距减小, 硬度增大; 随着轮/轨硬度比增大, 车轮表层的塑性变形层厚度逐渐减小, 对摩副钢轨塑性变形层厚度呈现先增大后减小的趋势; 车轮试样磨损形式由小剥离掉块向大剥离掉块转变, 钢轨磨损机制由材料表层的轻微剥落向深层剥落磨损转变; 提升车轮的硬度, 轮轨表面的疲劳裂纹长度减小; 且随着车轮硬度的增大, 钢轨表面萌生的疲劳裂纹的末端扩展角度有增大的趋势, 使钢轨的疲劳裂纹更容易向材料心部扩展.

     

    Abstract: The wear and fatigue damage characteristics between wheels of different materials and hot-rolled U75V rail steels were investigated by using a MMS-2A wheel/rail rolling wear testing apparatus. The results indicate that with the increasing carbon content of wheel materials, the proportions of pearlite in the microstructure increased and the interlamellar spacing of cementite decreased, resulting in the increasing of the surface hardness. With the increasing hardness ratio of wheel/ rail steels, the thickness of plastic deformation layer on wheel samples decreased significantly, however, for the rail samples, the thickness increased firstly and then decreased. Also, with the increasing hardness ratio of wheel/ rail steels, the wear of wheel samples transformed from small flakes to large flakes. The wear mechanism of wheel samples transformed from mild delamination to deep delamination. The higher hardness of wheel samples, the shorter the length of fatigue crack. Additional effect of high hardness was the angle of the tip of crack propagation of rails increased, thus leading to the fatigue cracks propagating to the heart of rail steels.

     

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