Piston ring such as a cast-iron piston ring or a steel piston ring for an internal combustion engine, comprises a substrate, and a coating obtained by thermal injecting a powder comprising element portions

摘要

The piston ring comprises a substrate, and a coating obtained by thermal injecting a powder comprising element portions, where the particle sizes of the powder are 1-100 mu m. A layer thickness of the coating is 20-1000 mu m. The thermal injection process comprises high speed flame injection process or plasma injection process. An independent claim is included for a method for manufacturing a piston ring for an internal combustion engine.