| 摘要 |
PURPOSE:To improve the abrasion resistance, heat resistance and corrosion resistance of a piston ring itself by forming the film of a super hard material on the sliding surface or the like of a piston ring body by using a PVD method. CONSTITUTION:A film 3 consisting of a super hard material of TiN, TiC, CrN or the like is formed on at least the sliding surface of a piston ring body 1 of an Alalloy or the like in contact with the wall surface of a cylinder line 2 by a PVD method such as a reactive ion plating method. The thickness of the film 3 is set at about 2-20mu. Thereby, the piston ring of high abrasion resistance, and a low coefft. of friction is obtained, the abrasion in the cylinder liner part 2 of the mating member is reduced and good sealability is maintained. |
