Funct. Mater. 2023; 30 (3): 453-457.
Fractal study of the effect of ion plasma coatings on wear resistance
1Kharkiv National Automobile and Highway University, 25 Yaroslava Mudrogo Str., 61002 Kharkiv, Ukraine
2Prydniprovska State Academy of Civil Engineering and Architecture, 24a Chernyshevsky Str., 49000 Dnipro, Ukraine
The feasibility of using the fractal approach to assess the effect of plasma coatings on increasing the wear resistance of parts was studied. Using the experimental design theory, a relationship has been established between the rigidity of the base material of the substrate, the roughness of the surface on which the coating is applied, the thickness of the coating and wear. The studies were carried out on parts of a volumetric hydraulic drive made of steel 38X2MYA after heat treatment. Ti-Cr-N ion plasma coatings were applied to the working surfaces. To assess the effect of the Ti-Cr-N coating structure on its wear indicators, fractal analysis was used. The lowest wear value was obtained for samples with a hardness of the base material of 45 HRC, its roughness of 0.16 and a coating thickness of 6 microns. The results of studies of wear indicators of parts with Ti-Cr-N coating showed the feasibility of using a fractal approach.
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