Page 28 - 《摩擦学学报》2021年第6期

第 41 卷 第 6 期 摩 擦 学 学 报 Vol 41 No 6
2021 年 11 月 Tribology Nov, 2021

DOI: 10.16078/j.tribology.2020247

钢轨打磨磨痕粗糙度与交叉磨痕对滚动

接触疲劳损伤的影响

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丁昊昊 , 郭 帅 , 周韶博 , 郭 俊 , 刘启跃 , 王文健 1
(1. 西南交通大学 牵引动力国家重点实验室 摩擦学研究所, 四川 成都 610031;
2. 中国铁道科学研究院集团有限公司 金属及化学研究所, 北京 100081)
摘 要: 利用砂纸在钢轨试样表面打磨出不同粗糙度等级(1、4和7 μm)的单向磨痕和交叉磨痕(−45°/70°、−20°/90°和
45°/70°)，利用MMS-2A轮轨摩擦磨损试验机对打磨后的钢轨试样进行滚动试验并分析滚动接触疲劳损伤规律. 结
果表明：打磨钢轨的滚动磨损表面粗糙度和损伤均比未打磨钢轨严重，随打磨磨痕粗糙度增加，钢轨滚动磨损表面
粗糙度和损伤均呈减小趋势. 当打磨粗糙度为7 μm时，滚动接触疲劳裂纹为枝裂纹，裂纹深度较小；随打磨粗糙度
减小，枝裂纹发生贯穿连通形成网状裂纹损伤，裂纹深度增加. 相较于单向打磨钢轨，交叉打磨磨痕钢轨滚动磨损
表面粗糙度较低，滚动接触疲劳损伤较轻微. 此外，−45°/70°和45°/70°交叉磨痕的滚动损伤比−20°/90°交叉磨痕钢轨
更加轻微.
关键词: 钢轨打磨; 磨痕粗糙度; 交叉磨痕; 滚动接触疲劳损伤; 水介质
中图分类号: TH117.1 文献标志码: A 文章编号: 1004-0595(2021)06–0813–08

Influences of Grinding Mark Roughness and Cross Marks on
Rolling Contact Fatigue Damage of Rail

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DING Haohao , GUO Shuai , ZHOU Shaobo , GUO Jun , LIU Qiyue , WANG Wenjian 1
(1. Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University,
Sichuan Chengdu 610031, China
2. Institute of Metals and Chemistry, China Academy of Railway Sciences Research
Group Co Ltd, Beijing 100081, China)
Abstract: Grinding marks with different roughness levels (1, 4, 7 μm) and cross grinding marks were produced on the
rail samples using abrasive papers. Then, rolling tests were conducted using those ground rail samples on the MMS-2A
wheel/rail friction and wear machine. After that, the rolling contact fatigue of ground rail was analyzed. The results
indicated that the roughness and damage of worn surfaces of ground rails were severer than those of unground rails.
With the increase in the grinding roughness, the roughness and damage of worn rails showed a decrease trend. When the
grinding roughness was 7 μm, branch cracks were generated, the depth of cracks was small. With the decrease in
grinding roughness, branch cracks connected with each other, then net-like cracks were generated, the depth of cracks
was increased. When the rails were ground with cross grinding marks, the roughness and rolling contact fatigue damage
of worn rails were alleviated. The rolling damage of the ground rail with the −45°/70° and 45°/70° cross marks was
milder than that of −20°/90° cross marks.
Key words: rail grinding; grinding marks roughness; cross marks; rolling contact fatigue damage; water medium

Received 6 November 2020, revised 7 December 2020, accepted 10 December 2020, available online 28 November 2021.
*Corresponding author. E-mail: guojun@home.swjtu.edu.cn, Tel: +86-28-87600389.
The project was supported by the National Natural Science Foundation of China (51975489), China Postdoctoral Science Foundation
(2019M663548) and Fundamental Research Funds for the Central Universities (2682020CX29).
国家自然科学基金项目(51975489)，中国博士后科学基金面上项目(2019M663548)和中央高校基本科研业务费专项资金
(2682020CX29)资助.