Title:
VALVE SEAT FOR INTERNAL COMBUSTION ENGINE MADE OF IRON SINTERED ALLOY AND PRODUCTION METHOD
Document Type and Number:
Japanese Patent JP2023152727
Kind Code:
A
Abstract:
To provide a valve seat made of an iron sintered alloy excellent in wear resistance and falling resistance.SOLUTION: There is provided a two layer structure valve seat 1 which is obtained by integrating by sintering, a function member layer 11, and a support member layer 12, the function member layer includes in a matrix phase including mainly, 20.0% of a fine carbide precipitation phase, and an annealing martensite phase: dispersed hard particles or solid lubricant particles; and a high allow phase around the hard particles. The iron sintered alloy material includes in mass%, one or two or more kinds selected from: 0.5-2.0% of C; 0.1-1.0% of Si; 0.1-2.5% of Mn; 1.0-7.0% of Ni; 1.0-12.0% of Cr; 2.0-12.0% of Mo; 2.0-20.0% of Co; 0.1-2.0% of W; 0.01-1.0% of V, and further has a matrix part composition including 0-1.5% of S, and includes holes in which Cu is filled by infiltration.SELECTED DRAWING: Figure 1
Inventors:
SUWA KIYOSHI
Application Number:
JP2023022380A
Publication Date:
October 17, 2023
Filing Date:
February 16, 2023
Export Citation:
Assignee:
NIPPON PISTON RING CO LTD
International Classes:
B22F5/00; B22F3/24; B22F3/26; B22F7/02; C22C19/07; C22C30/00; C22C37/00; C22C38/00; C22C38/58
Attorney, Agent or Firm:
Kenichiro Ochiai