Manufacturing Technology 2019, 19(6):930-935 | DOI: 10.21062/ujep/398.2019/a/1213-2489/MT/19/6/930

The Application of DLC Coating on Convex-concave (C-C) Gearings

Ernest Gondár1, Miroslav Bošanský2, Juraj Rusnák3, František Tóth3, Jana Repková1
1 Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Technologies and Materials, Pionierska 15, 831 02 Bratislava, Slovakia
2 Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Transport Technology and designing, Nám. slobody 17, 812 31 Bratislava, Slovakia
3 Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Machine design, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia

This paper discusses the possibility of increasing the surface load capacity in C60E steel gearings by applying DLC thin coating. It describes the effect of tribological characteristics, such as friction coefficient, wear, adhesion and hardness of DLC coating on convex-concave gearing (C-C). The average thickness of DLC coating is 1.2 μm. Delamination of the DLC coating was recorded at a load of approximately 50 N. The friction coefficient of the DLC coating was 0.09. The nano-hardness of the DLC coating was 14.4 GPa. The results of the tests to scuffing on C-C gearings on the Niemann tester show that the DLC coating deposition occurred at load level 5. The complete removal of the coating was preceded by gradual thinning. After its removal, the wear continued substrate, where the traces after milling filled-up with the substrate metal.

Keywords: Convex-concave gearing, DLC, friction coefficient, Niemann's test
Grants and funding:

Ministry of Education of the Slovak Republic within the project VEGA 1/0394/16 Study of the possibilities of preparation and application of composite materials from waste wood and plastics.
Project VEGA 1/0227/15 Study of tribological characteristics of the new high hardness coatings on the materials suitable for gearings and with the support of the University Research Park STU Bratislava, ITMS 26240220084.

Published: December 1, 2019  Show citation

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Gondár E, Bošanský M, Rusnák J, Tóth F, Repková J. The Application of DLC Coating on Convex-concave (C-C) Gearings. Manufacturing Technology. 2019;19(6):930-935. doi: 10.21062/ujep/398.2019/a/1213-2489/MT/19/6/930.
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