Journal of Mechanical Engineering >

2017 , Vol. 53 >Issue 20: 113 - 120

DOI: https://doi.org/10.3901/JME.2017.20.113

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

  • MA Lei ,
  • WANG Wenjian ,
  • GUO Jun ,
  • LIU Qiyue
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  • Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031

Received date: 2016-08-22

  Revised date: 2017-01-15

  Online published: 2017-10-20

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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： high-speed wheel materials; low temperature; wear; fatigue damage; embrittlement

Cite this article

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 . DOI: 10.3901/JME.2017.20.113

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