Title:
IRON-BASED SINTERED ALLOY AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3229390
Kind Code:
B2
Abstract:
PURPOSE: To remarkably improve the machinability and wear resistance of an iron-based sintered alloy by forming its structural state into one in which a specified amt. of specified MnS grains are uniformly dispersed.
CONSTITUTION: The structural state of the iron-based sintered alloy is formed into one in which MnS grains consisting of 5 to 50wt.% grains with ≤10μm grain size and 50 to 95wt.% grains with 10 to 100μm grain size are uniformly dispersed by 0.1 to 5.0wt.%. An iron-based raw material is uniformly mixed with MnS grains consisting of 5 to 50wt.% grains with ≤10μm grain size and 50 to 95wt.% grains with 10 to 100μm grain size by 0.1 to 5.0wt.% into the iron-based sintered raw material. The raw material is compacted and sintered to produce the iron-based sintered alloy. Thus, the service life of a valve seat and a valve can be prolonged.
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Inventors:
Yasukichi Egami
Teruo Takahashi
Arata Kakiuchi
Koji Umezawa
Teruo Takahashi
Arata Kakiuchi
Koji Umezawa
Application Number:
JP29339292A
Publication Date:
November 19, 2001
Filing Date:
October 30, 1992
Export Citation:
Assignee:
Nippon Piston Ring Co., Ltd.
International Classes:
C22C33/02; C22C38/00; (IPC1-7): C22C38/00; C22C33/02
Domestic Patent References:
| JP62167864A | ||||
| JP4210402A |
Attorney, Agent or Firm:
Eiichi Kobayashi