ISSN   1004-0595

CN  62-1095/O4

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李胜杰, 李佳辛, 吴柄男, 师陆冰, 张沭玥, 丁昊昊, 王文健, 刘启跃. 不同润滑材料对轮轨磨损与滚动接触疲劳的影响[J]. 摩擦学学报, 2022, 42(5): 935-944. DOI: 10.16078/j.tribology.2021118
引用本文: 李胜杰, 李佳辛, 吴柄男, 师陆冰, 张沭玥, 丁昊昊, 王文健, 刘启跃. 不同润滑材料对轮轨磨损与滚动接触疲劳的影响[J]. 摩擦学学报, 2022, 42(5): 935-944. DOI: 10.16078/j.tribology.2021118
LI Shengjie, LI Jiaxin, WU Bingnan, SHI Lubing, ZHANG Shuyue, DING Haohao, WANG Wenjian, LIU Qiyue. Influence of Lubricating Materials on Wheel-Rail Wear and Rolling Contact Fatigue[J]. TRIBOLOGY, 2022, 42(5): 935-944. DOI: 10.16078/j.tribology.2021118
Citation: LI Shengjie, LI Jiaxin, WU Bingnan, SHI Lubing, ZHANG Shuyue, DING Haohao, WANG Wenjian, LIU Qiyue. Influence of Lubricating Materials on Wheel-Rail Wear and Rolling Contact Fatigue[J]. TRIBOLOGY, 2022, 42(5): 935-944. DOI: 10.16078/j.tribology.2021118

不同润滑材料对轮轨磨损与滚动接触疲劳的影响

Influence of Lubricating Materials on Wheel-Rail Wear and Rolling Contact Fatigue

  • 摘要: 通过轮轨滚动接触模拟试验研究了干态、施加轨顶摩擦调节剂、润滑油和润滑脂工况下的轮轨摩擦、磨损和损伤行为,分析了不同润滑材料对轮轨滚动接触疲劳损伤的影响. 结果表明:施加轨顶摩擦调节剂可将轮轨摩擦系数调控至0.1~0.3范围内,车轮和钢轨试样磨损率较干态下分别降低了54.9%和26.3%,轮轨表面损伤、塑性变形和滚动接触疲劳损伤明显降低;施加润滑油和润滑脂具有更加显著的润滑和减磨效果,摩擦系数降低至0.1以下,磨损率降低85%以上,但润滑油和润滑脂会进入裂纹内部产生“油楔效应”,导致严重的滚动接触疲劳损伤,而轨顶摩擦调节剂的固体润滑特性则避免了该问题的产生.

     

    Abstract: With the rapid development of railway towards high speed and heavy load, the wheel-rail wear, rolling contact fatigue and friction noise in the curve section with small radius of freight and urban railways have become the key problems, which need to be urgently solved. Therefore, the purposes of this work was to compare the influence of different lubricating materials on wheel-rail wear and rolling contact fatigue damage through the wheel-rail rolling contact simulation test, and to analyze and discuss the wheel-rail rolling contact fatigue damage mechanism under different lubrication conditions. The wheel-rail lubrication materials selected in this work were oil, grease and friction modifier. The oil was vehicle-used oil, the grease was trackside anti-wear paste used on Houyue Line, and the friction modifier was the water-based friction modifier. In order to simulate the wear and damage behaviors of different lubricating materials in the wheel-rail system under the wear regime, the wheel-rail samples were pre-run 10 000 cycles under the dry condition at the beginning of the test. The simulated wheel-rail samples achieved the stable wear state and the sample surface presented a slight fatigue damage state. Then, the wheel-rail samples continued to run 25 000 cycles under the dry, the friction modifier, and the oil and grease conditions, respectively. Under the friction modifier condition, the friction coefficient between wheel and rail could be adjusted to the range of 0.1~0.3. The wear rates of wheel and rail were reduced by 60.8% and 26%, compared with those under the dry condition. At the same time, the plastic deformation and rolling contact fatigue damage of wheel and rail samples were significantly reduced. Under the oil or grease conditions, the friction coefficient between wheel and rail was reduced to below 0.1 (risk of low adhesion), and the wear rates of wheel and rail were reduced by more than 85%. The surface damage, plastic deformation and rolling contact fatigue damage of wheel samples were slighter than those under the friction modifier condition, but the rolling contact fatigue damage of rail samples was severer. Friction modifier, oil and grease could effectively reduce wheel and rail wear. Oil and grease could aggravate the rolling contact fatigue damage of rail samples. The "oil wedge effect" was the main mechanism that caused the serious rolling contact fatigue damage of rail samples under the oil and grease condition. The solid lubrication characteristics of the friction modifier at the wheel-rail interface made it difficult to enter the crack, thus the "oil wedge effect" was not obvious and the rolling contact fatigue damage was slight.

     

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