Scuffing Resistance of 16MnCr5 HCR TiAlCN-Coated Gears

This paper describes options of application of thin hard coatings on a non-standard involute HCR gearing made up of mat, 16MnCr5, in interaction with ecological gear oil OMV biogear S 150 and gear oil PP90H. Based on the analysis of their geometrical characteristic and it’s differences from a non-standard C-C gearing, the options of applying thin hard coatings on the surface of gear tooth flank are reviewed. From the previous results obtained at our workplace (Institute of Transport Technology and Designing, Faculty of Mechanical Engineering of STU in Bratislava) a TiAlCN nitride was applied and the article mentions the results obtained from Niemann’s stend for scuffing, which indicate that in the cases of lubrication with both OMV Biogear S 150 and PP90H similar results were achieved. The difference between the oils was only visible on the pinion, where scuffing occurred at the 12th load stage with OMV biogear S 150 oil at the dedendum, but with PP90H, no scuffing was observed.