Patent ID: 8083869

Claim:
A ferrous seal sliding part having a seal sliding surface, wherein said seal sliding surface has a quench hardened layer having a structure in which a martensite parent phase forms a solid solution with carbon of 0.15 to 0.6 wt % and contains cementite dispersed therein in a content of 3 to 50% by volume, wherein said martensite parent phase has a layered structure region comprising platy cementite and martensite phase dispersed therein in an area ratio of 20% or more, whereby cementite including said platy cementite is dispersed in the martensite parent phase in a total content of 3 to 50% by volume, wherein said platy cementite shows an oil pocket effect for receiving a lubricating oil on said sliding surface, and wherein cementite dispersed in said martensite parent phase contains granulated cementite having an average grain size of 0.1 to 10 μm dispersed in a total content of 0.1 to 10% by volume in addition to said platy cementite.