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Advances in Materials Science and Engineering
Volume 2017, Article ID 6373190, 8 pages
https://doi.org/10.1155/2017/6373190
Research Article

Study on the High Temperature Friction and Wear Behaviors of Cu-Based Friction Pairs in Wet Clutches by Pin-on-Disc Tests

1School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China
2Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, China

Correspondence should be addressed to He-Yan Li; nc.ude.tib@nayehvol

Received 10 January 2017; Revised 2 May 2017; Accepted 8 May 2017; Published 29 May 2017

Academic Editor: Carlos Navarro

Copyright © 2017 Er-Hui Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This work is devoted to the study of the high temperature friction and wear behaviors of Cu-based friction pairs in wet clutches under different temperatures, rotation speeds, and loads. Pin-on-disc tests are carried out on the UMT-3. The friction coefficient, wear factor, and high temperature wear mechanism are primarily analyzed. The results show that as the temperature rises from 120°C to 420°C, the friction coefficient increases from 0.28 to 0.35 at first and then decreases to 0.30, when the vibration of friction coefficient is significantly identified. Meanwhile, the wear factor grows gradually from  g/Nm to  g/Nm at first and then grows sharply to  g/Nm. The main wear mechanisms are abrasive wear and ploughing wear when the temperature is below 345°C, and the wear seriously deteriorates when the temperature exceeds 345°C, when the wear mechanism changes to adhesive wear and delamination wear.