HIGH CHROMIUM STEEL PISTON

摘要

PROBLEM TO BE SOLVED: To provide a high chromium steel piston having an anti-seizure property equivalent to or higher than that of a ductile piston on which a phosphate treated film such as a manganese phosphate film is formed in the piston for an internal combustion engine. SOLUTION: The high Cr steel piston with high anti-seizure property can be provided by forming a film layer formed of an oxalate treated film layer or a film layer containing a solid lubricating material formed mainly of at least one of molybdenum disulfide, tungsten disulfide, and graphite on the metal surface of the high Cr steel piston. COPYRIGHT: (C)2006,JPO&NCIPI