金属热处理 ›› 2023, Vol. 48 ›› Issue (10): 221-224.DOI: 10.13251/j.issn.0254-6051.2023.10.034

• 材料研究 • 上一篇    下一篇

晶粒度等级对高铁车轮钢滚动摩擦磨损性能的影响

欧阳爱国, 余斌, 胡军, 刘燕德   

  1. 华东交通大学 机电与车辆工程学院, 江西 南昌 330013
  • 收稿日期:2023-05-17 修回日期:2023-08-11 出版日期:2023-10-25 发布日期:2023-12-07
  • 作者简介:欧阳爱国(1968—),男,教授,主要研究方向为光电无损检测,E-mail:ouyang1968711@163.com
  • 基金资助:
    国家自然科学基金(31760344);江西省教育厅科学技术研究项目(GJJ60516);江西省优势科技创新团队建设计划(20153BCB24002)

Effect of grain size grade on rolling friction wear properties of high speed railway wheel steel

Ouyang Aiguo, Yu Bin, Hu Jun, Liu Yande   

  1. School of Mechanical & Electrical Engineering, East China Jiaotong University, Nanchang Jiangxi 330013, China
  • Received:2023-05-17 Revised:2023-08-11 Online:2023-10-25 Published:2023-12-07

摘要: 采用GPM-30型轮轨滚动接触疲劳试验机对比研究了3种不同晶粒度等级的ER8高铁车轮钢试样的滚动摩擦磨损性能,通过测量摩擦因数、计算磨损率、观察表面磨损形貌来评价其磨损性能。结果表明,试样晶粒度等级越高,稳态平均摩擦因数越小,磨损率越低。晶粒度11.0级试样的稳态平均摩擦因数为0.19,磨损率为0.663×10-5 g/m,而晶粒度10.0级、晶粒度9.5级试样的稳定平均摩擦因数分别为0.26、0.35,磨损率分别为1.326×10-5、4.421×10-5 g/m。晶粒度9.5级试样表面的剥落损伤严重,磨损率最高。晶粒度11.0级试样磨损后表面氧化严重,在表面形成了一定厚度的氧化层,氧化层在磨损过程中起到减小摩擦的作用,因此,试样摩擦因数较小。

关键词: 高铁车轮钢, 滚动摩擦磨损性能, 晶粒度, 摩擦因数, 磨损率

Abstract: Rolling friction wear properties of ER8 high speed railway wheel steel specimens with three different grain size grades were comparatively investigated by using the GPM-30 rolling contact fatigue tester. The wear properties were evaluated by measuring the friction coefficient, calculating the wear rate and observing the wear morphologies. The results show that the higher the grain size grade of the specimen is, the lower the steady-state average friction factor is, and the lower the wear rate is. The steady state average friction factor of the specimen with grain size grade of 11.0 is 0.19, and the wear rate is 0.663×10-5 g/m, while the steady state average friction factor of the specimens with grain size grades of 10.0 and 9.5 are 0.26 and 0.35 respectively, and the wear rate is 1.326×10-5, 4.421×10-5 g/m respectively. The surface severe spalling damage of the specimen with grain size grade of 9.5 is serious, and the wear rate is the highest. While the surface of the specimen with grain size grade of 11.0 is seriously oxidized after wear, where the oxide layer with a certain thickness is formed, which results in reduction of friction during the wear process, so that the friction factor of the specimen is smaller.

Key words: high speed rail wheel steel, rolling friction wear properties, grain size grade, friction factor, wear rate

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