| 曲率半径对车轮滚动接触疲劳性能的影响 |
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| 引用本文： | 何成刚,周桂源,王娟,文广,王文健,刘启跃. 曲率半径对车轮滚动接触疲劳性能的影响[J]. 摩擦学学报, 2014, 34(3): 256-261 |
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| 作者姓名： | 何成刚 周桂源 王娟 文广 王文健 刘启跃 |
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| 作者单位： | 西南交通大学机械工程学院 摩擦学研究所, 四川 成都 610031;西南交通大学机械工程学院 摩擦学研究所, 四川 成都 610031;西南交通大学机械工程学院 摩擦学研究所, 四川 成都 610031;西南交通大学机械工程学院 摩擦学研究所, 四川 成都 610031;西南交通大学机械工程学院 摩擦学研究所, 四川 成都 610031;西南交通大学机械工程学院 摩擦学研究所, 四川 成都 610031 |
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| 基金项目： | 国家自然科学基金项目（51174282）、教育部创新团队科学基金（IRT1178）、国家杰出青年基金（51025519）和国家重点实验室自主研究课题（TPL1301）资助. |
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| 摘 要： | 滚动接触疲劳和磨损是铁路轮轨损伤的主要问题.本文中应用赫兹接触理论,在JD-1型轮轨模拟试验机上,通过改变试验冲角,研究了干态工况下曲率半径对车轮钢滚动接触疲劳性能的影响,并用光学显微镜和扫描电子显微镜观察车轮试样剖面与磨痕表面交界处的疲劳裂纹,分析不同曲率半径条件下车轮的滚动接触疲劳机理.结果表明:由于加工硬化的作用试验后所有试样的硬度均有提高;随着曲率半径的减小,车轮钢的磨损量增大,塑性流变层增厚且不均匀,车轮试样疲劳裂纹扩展加剧;裂纹在交变应力作用下容易继续向下扩展,从而形成严重的疲劳破坏.
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| 关 键 词： | 车轮钢 曲率半径 疲劳裂纹 磨损 接触疲劳 |
| 收稿时间： | 2013-09-02 |
Effect of Curve Radius of Rail on Rolling Contact Fatigue Properties of Wheel Steel |
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| HE Cheng-gang,ZHOU Gui-yuan,WANG Juan,WEN Guang,WANG Wen-jian and LIU Qi-yue. Effect of Curve Radius of Rail on Rolling Contact Fatigue Properties of Wheel Steel[J]. Tribology, 2014, 34(3): 256-261 |
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| Authors: | HE Cheng-gang ZHOU Gui-yuan WANG Juan WEN Guang WANG Wen-jian LIU Qi-yue |
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| Affiliation: | Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China;Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China;Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China;Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China;Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China;Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | Rolling contact fatigue (RCF) and wear are inevitable problems for the infrastructure of modern railway. The effect of curve radius on the rolling contact fatigue properties of wheel steels under dry conditions was investigated on JD-1 wheel/rail simulation facility with Hertz contact theory and different attack angles. The rolling contact fatigue mechanism analysis of wheel with different curve radius was investigated in detail by observing fatigue cracks of the junction of cross section and wear surface of wheel specimens using optical microscopy and scanning electronic microscopy. The results indicate that there was an increase in the surface hardness of all specimens after testing due to work hardening. With a decrease in curve radius the wear volume of wheel steels increased,and the plastic flow layer became thicker and uneven,and the fatigue crack propagation of wheel steel sample intensified. Cracks continued to propagate into the bulk under alternating stress,thus creating severe fatigue damage. |
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| Keywords: | wheel steel curve radius fatigue crack wear contact fatigue |
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