COATING METHOD FOR ENGINE MOVING PARTS

摘要

An objective of the present invention is to provide a method to coat an engine drive part which improves wear resistance and lubrication at high temperatures. According to the present invention, the method to coat the engine drive part comprises: a first step of depositing chrome (Cr) atoms on a base material by an arc ion plating method under a nitrogen (N_2) gas inflow condition to form a thin film of a mixture of chrome (Cr) and chrome nitride (CrN, Cr_2N); and a second step of depositing chrome atoms on the base material by the arc ion plating method and depositing zirconium (Zr) atoms by a sputtering method under an inflow condition of nitrogen (N_2) gas and argon (Ar) gas to form a thin film of a mixture of chrome, chrome nitride, and zirconium (Zr). The second step forms the thin film with a zirconium (Zr) content of 3.5-4.5 at%.