The Rolling Contact Fatigue of PVD Coated Spur Gears

Abstract:

The aim of the study was to investigate the resistance to rolling contact fatigue of a C:H:W and MoS2/Ti coated gears. The investigation of rolling contact fatigue was realised by means of a gear test rig using FZG PT C/10/90 pitting test. Four material combinations of gears were tested: wheel and pinion uncoated, wheel and pinion coated, wheel coated and pinion uncoated as well as wheel uncoated and pinion coated. The tests were performed using for lubrication mineral gear oil of API GL-5 performance level and 80W/90 viscosity grade. The results indicate that for the coated/coated pair (pinion and wheel coated) and coated pinion/steel wheel pair a significant decrease in the fatigue life compared to the uncoated gears was obtained. The best results were obtained in the case of the uncoated pinion / a-C:H:W coated wheel – even fourfold increase in the fatigue life was observed. This shows a very high potential of application of PVD coatings for gears.

• Periodical: Key Engineering Materials (Volume 527)
• Pages: 77-82
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.527.77
• Online since: November 2012
• Authors: Remigiusz Michalczewski, Witold Piekoszewski, Marian Szczerek, Waldemar Tuszynski, Maksim Antonov
• Keywords: Coating, Rolling Contact Fatigue (RCF), Spur Gears

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