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1. (WO2015045745) PISTON RING

Pub. No.:    WO/2015/045745    International Application No.:    PCT/JP2014/072881
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Tue Sep 02 01:59:59 CEST 2014
IPC: F02F 5/00
C23C 14/06
F16J 9/26
Applicants: KABUSHIKI KAISHA RIKEN
株式会社リケン
Inventors: HONDA Keiji
本多 啓二
TSUJI Katsuhiro
辻 勝啓
MORONUKI Masaki
諸貫 正樹
SEKIYA Takuma
関矢 琢磨
Title: PISTON RING
Abstract:
Provided is a piston ring which exhibits excellent resistance to abrasion caused by a mating member that is a cylinder or cylinder liner made of an aluminum alloy and which can reduce the abrasion of the mating member. A piston ring (10) which has a hard carbon film (14) formed on the outer peripheral surface (10a), wherein the hard carbon film contains W in an amount of 0.5 to less than 5at%.