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Tribology Letters

, 67:121 | Cite as

Effect of Upper Bainite on Wear Behaviour of High-Speed Wheel Steel

  • Qian Li
  • Jun Guo
  • Aimin ZhaoEmail author
Original Paper
  • 78 Downloads

Abstract

This paper presents the wear and damage behaviours of the wheel/rail material of ER8 and of U71Mn under the same cycles condition, which were explored using a double-disc rolling wear testing device. The morphology of the worn surface and the morphology of cross sections were observed by laser scanning confocal microscopy (LSCM) and scanning electron microscopy (SEM). Results show that the microstructure of wheel steel includes ferrite, pearlite and upper bainite. As the cycles increased, the weight loss of the wheel steel containing upper bainite is significantly increased when compared with ferrite–pearlite wheel steel, and the plastic layer is more deformed than the ferrite–pearlite wheel steel. The deformation of the upper bainite is easier than the pearlite, and the cementite in the upper bainite presents granularity and short rod-shaped. With only ferrite and pearlite in the microstructure, the main wear mechanism varies from oxidative wear to adhesive wear and eventually into fatigue wear. When the microstructure is composed of ferrite, pearlite and upper bainite, the main wear mechanism changes from oxidative wear to ploughing wear and abrasive wear, and ultimately to fatigue wear.

Keywords

High-speed wheel steel Upper bainite Pearlite Wear 

Notes

Acknowledgements

This work was supported by the development project of China railway corporation (Grant Nos. J2018J004 and 2015j004-d).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Collaborative Innovation Center of Steel TechnologyUniversity of Science and Technology BeijingBeijingPeople’s Republic of China

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