Title:
PISTON RING MATERIAL FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2017082818
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a piston ring material in which generation of freckles in structure of ingot can be suppressed.SOLUTION: The piston ring material for an internal combustion engine contains, by mass, 0.70-1.00% of C, 0.2-0.6% of Si, 0.2-0.5% of Mn, 16-18% of Cr, 0.80-1.20% of two kinds of Mo and W in a relational expression of (Mo+1/2 W), 0.05-0.30% of V, and balance Fe with impurities. In the piston ring material for an internal combustion engine, contents of Mo and W are 0.15-0.35% and 1.30-1.70% respectively. Further the piston ring material for an internal combustion engine contains 10.0 mass % or less of Co.SELECTED DRAWING: Figure 1
Inventors:
KOGA MASAAKI
KUBOTA KUNICHIKA
SATO NAOYA
KUBOTA KUNICHIKA
SATO NAOYA
Application Number:
JP2015208677A
Publication Date:
May 18, 2017
Filing Date:
October 23, 2015
Export Citation:
Assignee:
HITACHI METALS LTD
International Classes:
F16J9/26; F02F5/00