Modeling wear process of oil scraper piston rings with pyrolytic chromium coating

Abstract

Abstract The modern designs of oil scraper piston rings of internal combustion engines, including box-section rings with an expander are considered. Pyrolytic carbide of chrome coating of the working edges of oil scraper piston rings are proposed as a possible alternative to galvanic chromium coating. The results of model tribotechnical samples tests, which showed the effectiveness of pyrolytic chromium carbide plating in comparison with galvanic coating with chromium, are presented. Under the same conditions the wear of samples with pyrolytic chromium plating is 3.5 … 4 times less. It is shown that pyrolytic carbide chromium coating is promising for piston oil scraper rings.