Title:
ピストンリング
Document Type and Number:
Japanese Patent JP6422495
Kind Code:
B2
Abstract:
Provided is a piston ring (10) comprising a sliding surface (11) covered with a Cr-B-V-N alloy film (3), wherein a B content is within a range of 0.1-1.5 mass% inclusive, a V content is within a range of 0.05-1 mass% inclusive, and a ratio [B content / V content] is within a range greater than 1 and 30 or less, thereby achieving a piston ring (10) having higher wear resistance, cracking resistance, and peeling resistance. This alloy film (3) preferably further includes Ti, the Ti content being within a range greater than 0 mass% and 8 mass% or less. Such a piston ring (10) is preferably mounted on an engine that uses an alcohol fuel or an alcohol-containing fuel.
Inventors:
Noriaki Senda
Okano
Okano
Application Number:
JP2016531407A
Publication Date:
November 14, 2018
Filing Date:
June 30, 2015
Export Citation:
Assignee:
Nippon Piston Ring Co., Ltd.
International Classes:
F16J9/26; F02F5/00; F02M25/00
Domestic Patent References:
| JP2013155420A | ||||
| JP2008286354A | ||||
| JP2007271072A | ||||
| JP20001767A |
Attorney, Agent or Firm:
Shunichi Yoshimura