HELICAL COMPRESSION SPRING FOR AN OIL SCRAPER RING OF A PISTON IN AN INTERNAL COMBUSTION ENGINE AND METHOD FOR COATING A HELICAL COMPRESSION SPRING

摘要

A helical compression spring, preferably of steel, in particular CrSi steel or CrNi steel, comprises a coating which has at least one a-C: H: Me coating or a plurality of layers of CrN (16) and a-C: H: Me coatings (14) alternately. In a method for coating a helical compression spring, preferably of steel, a plurality of layers of CrN and a-C: H: Me coatings are applied alternately.