低温下高速车轮材料滚动磨损与疲劳损伤行为

doi:10.3901/JME.2017.20.113

机械工程学报 ›› 2017, Vol. 53 ›› Issue (20): 113-120.doi: 10.3901/JME.2017.20.113

低温下高速车轮材料滚动磨损与疲劳损伤行为

马蕾, 王文健, 郭俊, 刘启跃

西南交通大学摩擦学研究所成都 610031

收稿日期:2016-08-22 修回日期:2017-01-15 出版日期:2017-10-20 发布日期:2017-10-20
通讯作者: 王文健(通信作者),男,1980年出生,博士,研究员,博士研究生导师.主要研究方向为轮轨系统摩擦学及服役行为.E-mail:wwj527@163.com
作者简介:马蕾,女,1987年出生,博士研究生.主要研究方向为轮轨摩擦学.E-mail:sheshuyuan@163.com
基金资助:
国家自然科学基金资助项目（51475393）。

Rolling Wear and Fatigue Damage Behavior of High-speed Wheel Materials at Low Temperature

MA Lei, WANG Wenjian, GUO Jun, LIU Qiyue

Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031

Received:2016-08-22 Revised:2017-01-15 Online:2017-10-20 Published:2017-10-20

摘要/Abstract

摘要： 利用低温环境轮轨磨损模拟试验装置，研究了高速铁路车轮材料在室温及低温环境下的滚动接触疲劳损伤行为。结果表明：低湿度的低温环境导致车轮材料磨损率、塑性变形及疲劳损伤较室温下明显加重。随试验温度的降低，轮轨摩擦因数、磨损率及表面硬度均呈现先急剧上升后轻微下降趋势。室温工况下磨痕表面有严重的犁沟现象，而低温工况下车轮试样表面以疲劳裂纹及剥落损伤为主。随着温度的降低，磨损形式由氧化磨损、磨粒磨损逐渐向疲劳及粘着磨损转变。车轮材料裂纹主要沿较软的铁素体线扩展，室温下剖面损伤较轻微。低温工况下由于车轮材料发生脆化，珠光体呈现不同于室温下的形貌及分布特性。在低温下，表层裂纹扩展角度及次表层裂纹长度增加，同时表层裂纹易于汇合并产生分支。

关键词: 脆化, 低温, 高速车轮材料, 磨损, 疲劳损伤

Abstract: The rolling contact fatigue damage behaviors of high-speed railway wheel material at room and low temperatures are studied by using wheel/rail rolling wear simulation experiment device under low temperature environment. The results show that the low humidity leads to the increase of wear rate, plastic deformation and fatigue damage at low temperature. With the temperature decreasing, the friction coefficient, wear rate and surface hardness show a sharp rise trend and then slight decline. The ploughing dominates on the wheel surface at room temperature, while fatigue crack and peeling at low temperature. With the decrease of temperature, wear mode changes gradually from oxidation wear, abrasive wear to the fatigue wear and adhesive wear. The crack of wheel roller mainly propagates along the soft ferrite line and the profile damage is mild at room temperature. Due to the embrittlement of wheel material at low temperature, the morphology and distribution characteristics of pearlite is different from that at room temperature. At low temperature, the angle of surface crack and length of subsurface crack increases, moreover, the surface crack merges with adjacent cracks easily and branching occurs.

Key words: embrittlement, fatigue damage, high-speed wheel materials, low temperature, wear

中图分类号:

TH117

马蕾, 王文健, 郭俊, 刘启跃. 低温下高速车轮材料滚动磨损与疲劳损伤行为[J]. 机械工程学报, 2017, 53(20): 113-120.

MA Lei, WANG Wenjian, GUO Jun, LIU Qiyue. Rolling Wear and Fatigue Damage Behavior of High-speed Wheel Materials at Low Temperature[J]. Journal of Mechanical Engineering, 2017, 53(20): 113-120.

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低温下高速车轮材料滚动磨损与疲劳损伤行为

Rolling Wear and Fatigue Damage Behavior of High-speed Wheel Materials at Low Temperature

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