Patent ID: 8530051
Filing Date: 2013-09-10
Classification: C23C,Y10T

Abstract:
1. A sliding member comprising: a base material formed of an iron alloy subjected to carburizing or carbonitriding treatment, the base material having a sliding surface; a first diamond-like carbon film with which the sliding surface of the base material is coated, the first diamond-like carbon film having a hydrogen content of not more than 10 atomic % and a surface hardness ranging from 8 to 30 GPa in a nano-indentation test; and a second diamond-like carbon film with which at least a part of the first diamond-like carbon film is coated, the second diamond-like carbon film having a hydrogen content of not more than 10 atomic % and a surface hardness ranging from 50 to 90 GPa in the nano-indentation test, the second diamond-like carbon film having a surface roughness Ra ranging from 0.1 to 0.2 μm.