Compression helical spring to a ring scraper oil of a piston of an internal combustion engine, and method for coating a helical compression spring

摘要

Heliocoidal spring compression to an oil scraper ring of a piston of an internal combustion engine, and method for coating a spring heliocoidal compression. A compression spring heliocoidal, preferably made of steel, in particular CRSI or steel CrNi steel, comprises an alt Ernadamente a plurality of layers of CrN (16) and layers (C: H: m (14).In a method for the coating of a helical compression spring, preferably made of steel are applied alternately several layers of CrN and layers - C: H: me.