Invention Grant
- Patent Title: Piston ring material for internal combustion engine
- Patent Title (中): 内燃机活塞环材料
-
Application No.: US12934575Application Date: 2009-03-17
-
Publication No.: US08480821B2Publication Date: 2013-07-09
- Inventor: Katsuhiko Ohishi , Toshihiro Uehara , Kunichika Kubota
- Applicant: Katsuhiko Ohishi , Toshihiro Uehara , Kunichika Kubota
- Applicant Address: JP Tokyo
- Assignee: Hitachi Metals Ltd.
- Current Assignee: Hitachi Metals Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2008-082340 20080327
- International Application: PCT/JP2009/055186 WO 20090317
- International Announcement: WO2009/119388 WO 20091001
- Main IPC: C22C38/00
- IPC: C22C38/00 ; F16J9/00

Abstract:
A piston ring material is provided which retains excellent mechanical properties and processability, which are required of piston ring materials, and has wearing resistance and scuffing resistance, which are sliding properties required of piston rings. The piston ring material, which is for use in internal combustion engines, contains, in terms of mass %, 0.3-0.8% carbon, 0.1-3.0% silicon, 0.1-3.0% manganese, 0.01-0.3% sulfur, 0.1-2.0% chromium, and 0.05-2.0% the sum of titanium and/or zirconium, with the remainder being iron and incidental impurities. The titanium and/or zirconium contained in the piston ring material and the sulfur contained therein satisfy the following relationship. [Ti (%)+½Zr (%)]/S (%)≦5.0 Preferably, the material may contain one or more members selected from up to 1.0% copper, less than 3.0% molybdenum, up to 1.0% aluminum, and less than 2.0% nickel, in terms of mass %.
Public/Granted literature
- US20110018207A1 PISTON RING MATERIAL FOR INTERNAL COMBUSTION ENGINE Public/Granted day:2011-01-27
Information query