Abstract
Ti-C-N films were deposited as a TiN-TiC solid solution by a reactive ion plating system activated by arc discharge and were applied to side trimmers. Dependence of chemical composition of the coatings on properties such as hardness, oxidation resistance, residual stress, critical load and wear resistance were studied. The coatings exhibited extremely high hardness, and pin-on-disk tests on multilayered coatings revealed superior wear resistance against steels. It is suggested that fine iron debris comes from steel pins and is oxidized by the reaction with oxygen in air, and that a protective oxide particle can be formed by the growth of oxide debris on the hard surface. The tool-life of side trimmers was markedly improved by the application of the Ti-C-N coatings, due to the fact that multilayered Ti-C-N coatings decreased the sliding-wear rate of the side edge of side trimmers in shearing steel sheets.
