Title:
VALVE SHEET MADE OF COPPER INFILTRATED SINTERED ALLOY FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JPH04218648
Kind Code:
A
Abstract:
PURPOSE: To improve the attackability of a valve sheet made of a copper infiltrated sintered alloy for an internal combustion engine against mates.
CONSTITUTION: A sintered alloy base body for a valve sheet made of a copper infiltrated sintered alloy for an internal combustion engine is constituted of a sintered alloy with 10 to 20% porosity having a four phase mixed structure of the phase of a Cr-Co-W alloy having 1000 to 1500 micro-Vickers hardness (MHv), the phase of a Co-Mo-Cr alloy having 500 to 1000MHv, the phase of Y2O3 having 300 to 600MHv and the phase of an Fe-Co alloy having 100 to 300MHv.
Inventors:
MAYAMA OSAMU
ISHIKAWA TOMOMI
ISHIKAWA TOMOMI
Application Number:
JP41895790A
Publication Date:
August 10, 1992
Filing Date:
December 17, 1990
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
B22F3/26; C22C33/02; C22C38/00; C22C38/52; F01L3/02; (IPC1-7): B22F3/26; C22C33/02; C22C38/00; C22C38/52; F01L3/02
Attorney, Agent or Firm:
Kazuo Tomita (1 person outside)