Comparison of PVD Coatings Nacro⁴ and TIALN + DLC Deposited on High Contact Ratio Gearing Interacting With Conventional and Ecological Lubricants

Abstract

Proposed paper deals with experimental tests performed on the Nieman M01 FZG test rig. Experiments were carried out in accordance with STN 65 6280 standard for FZG scuffing tests, from which load values for each load level were obtained. HCR gears made of 16MnCr5 material were utilized during experimental tests. Gear surface was deposited by PVD coatings of nACRo4 and TiAlN + DLC. Conventional lubricant MADIT PP 90H and biological lubricant OMW Biogear S150 were selected for lubrication environments. Aim of the experimental tests lied in application and comparison of PVD coatings deposited on HCR gears. Values of the maximum height of the assessed profile Rz for tip and reference diameters were measured after each load level. Results of experimental tests were statistically processed and relations between the maximum height of assessed profile Rz and load levels for both utilized coatings in both environments were established on the basis of these results.

Features of Wear of Gears of Agricultural Machinery

“…(Zhu et al, 2017;Stachowiak and Batchelor, 2013;Wu et al, 2019). A common method for reliably assessing the degree of wear of gears is a visual inspection of the surface of the teeth with the help of cameras with increased magnification (Peng et al, 2017;Kuleshkov et al, 2021;Kangalov et al, 2022;Fürstenzeller et al, 2019;Stachowiak and Blau, 2017). In this case, the appearance of the tooth surface is compared with standard samples in order to determine specific mechanisms and wear rates.…”

“…Here, the hardness of the contact surface of teeth reaches HRC 60-63. (Ebersbach, 2007). The third problem is related to the limited resolution of the human eye or portable optical devices (cameras) (Younes et al, 2005;Chang et al, 2019).…”

Abrasion Resistance of Restorative Coatings for Crankshafts and Bearings in Agricultural Machinery

“…The wear of these surfaces is very insignificant and represents less than 1% of their size and 0.1% of their mass in the majority of cases. The absolute amount of wear is also very small and usually ranges from 0.1 mm to 0.5 mm (Beloev et al, 2008;Dimitrov, 2018;Fürstenzeller et al, 2019;Nikolov and Kangalov, 2014;Tkáč et al, 2017). Despite the minimal wear values, it still can lead to a large number of failures and malfunctions.…”