ISSN   1004-0595

CN  62-1224/O4

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韩振宇, 汪渊, 丁昊昊, 张沭玥, 王文健, 刘佳朋, 刘启跃, 周仲荣. 不同运行参数下珠光体与贝氏体钢轨钢滚动磨损与接触疲劳行为研究[J]. 摩擦学学报(中英文), 2025, 45(3): 1−12. doi: 10.16078/j.tribology.2023258
引用本文: 韩振宇, 汪渊, 丁昊昊, 张沭玥, 王文健, 刘佳朋, 刘启跃, 周仲荣. 不同运行参数下珠光体与贝氏体钢轨钢滚动磨损与接触疲劳行为研究[J]. 摩擦学学报(中英文), 2025, 45(3): 1−12. doi: 10.16078/j.tribology.2023258
HAN Zhenyu, WANG Yuan, DING Haohao, ZHANG Shuyue, WANG Wenjian, LIU Jiapeng, LIU Qiyue, ZHOU Zhongrong. Wear and Rolling Contact Fatigue Behavior of Pearlitic and Bainitic Rail Steels under Different Operating Parameters[J]. Tribology, 2025, 45(3): 1−12. doi: 10.16078/j.tribology.2023258
Citation: HAN Zhenyu, WANG Yuan, DING Haohao, ZHANG Shuyue, WANG Wenjian, LIU Jiapeng, LIU Qiyue, ZHOU Zhongrong. Wear and Rolling Contact Fatigue Behavior of Pearlitic and Bainitic Rail Steels under Different Operating Parameters[J]. Tribology, 2025, 45(3): 1−12. doi: 10.16078/j.tribology.2023258

不同运行参数下珠光体与贝氏体钢轨钢滚动磨损与接触疲劳行为研究

Wear and Rolling Contact Fatigue Behavior of Pearlitic and Bainitic Rail Steels under Different Operating Parameters

  • 摘要: 钢轨服役过程中的滚动磨损和接触疲劳损伤行为直接影响到列车的运行安全,而钢轨材质和运行参数对其损伤具有关键影响. 因此,本文中利用JD-1轮轨模拟试验机开展了珠光体和贝氏体钢轨材料在不同运行速度、轴重及曲线半径下的轮轨滚动接触模拟试验. 研究表明:珠光体与贝氏体钢轨材料在相同运行工况下滚动磨损和接触疲劳行为存在差异,贝氏体钢轨材料的损伤程度较珠光体钢轨材料轻微;钢轨材料磨损率及表面损伤变化趋势均与运行速度和曲线半径呈负相关,而与轴重的变化趋势呈正相关;钢轨材料的塑性变形层深度随轴重的增大以及曲线半径的减小而增加,滚动接触疲劳损伤随轴重呈先增加后减小的整体变化趋势. 在轴重较大、运行速度和曲线半径较小工况下,钢轨材料损伤严重,故需对相应钢轨线路进行实时监测并采取维修养护措施.

     

    Abstract: Objective Rail service plays a crucial role in facilitating train support, guidance, and high-speed operation, constituting a core component of track structure. It directly impacts the operational safety of high-speed railway trains. Wear and rolling contact fatigue (RCF) are the primary mechanisms causing damage to rail materials during wheel-rail service processes. To investigate the influence of rail material and operational conditions on rail wear and RCF behavior, twin-disc rolling-sliding tests were conducted. Method In the present study, hypoeutectoid, eutectoid and bainitic rail steels were selected to run against CL60 wheel. Seven series of tests were conducted, and each tests were all running for 500 000 cycles. Tests were performed under three wheel velocities (120, 200 and 250 r/min), three axle loads (17, 21 and 25t) and three curvature radius (flat, 600 and 2000 m). The wear and RCF behavior of rail materials after the test were analyzed in details. Results The results indicated that the wear rate of eutectoid rail material was always higher than that of hypoeutectoid rail and bainite rail. The surface damage of eutectoid rail materials was always more severe than the other two materials. The surface damage of bainite steel rail material was the least severe, with only a number of pits distributed and almost no material peelings. The plastic deformation layer depth of eutectoid steel rail was about 1.8 times that of hypoeutectoid steel rail and bainite steel rail materials. The crack length and depth of pearlite rail materials were generally greater than those of bainite rail materials. With the velocity increased, the wear rate and surface damage degree of the rail material generally showed a decreasing trend. And there was almost no effect on the depth of plastic deformation layer and the degree of crack damage of rail materials. With the axle load increased, the surface damage and plastic deformation layer depth of the three rail materials gradually increased. And the degree of RCF crack damage would gradually intensify under the increasing wheel-rail contact effect with the axle load increases. When the axle load further increased to 25 t, material peeling would occur on the rail surface, which would reduce the length and depth of the cracks. Reducing the curvature radius would lead to an increase in the lateral force, thereby increasing the wear rate and plastic deformation layer depth of the rail material. As the curvature radius decreased, the rail surface damage significantly intensified, especially for pearlite materials with a 600 m curve radius, there were a large number of layered material peelings on the surface. Conclusions Under identical operational conditions, variations in wear and RCF behavior were observed among different rail materials. Generally, bainitic steel rail materials exhibited milder damage compared to eutectoid steel rails. As velocity increased, the wear rate of rail material decreased, along with a reduction in surface damage. Conversely, with increased axle load, both the material wear rate and the depth of plastic deformation layer increased, resulting in heightened surface damage. Additionally, fatigue crack damage initially increased and then diminished. Notably, the trends of material wear rate, plastic deformation layer depth, and surface damage degree showed a negative correlation with curvature radius. Rail material sustained more severe damage under operating conditions characterized by lower speeds, heavier axle loads, and smaller curvature radii on railway lines. Consequently, timely implementation of corresponding repair measures was imperative.

     

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