Title:
HIGH STRENGTH STEEL MEMBER AND PRODUCTION THEREOF BY INJECTION MOLDING METHOD
Document Type and Number:
Japanese Patent JP2745889
Kind Code:
B2
Abstract:
PURPOSE: To provide a high strength steel member by an injection molding method where its tensile and breaking strength is increased without decreasing much elongation percentage of the product compared with the existing Fe-Ni-C alloy.
CONSTITUTION: A high strength steel member consisting of 1-10wt.% Cu, 0.3-1.0wt.% C and the balance Fe with inevitable impurities is produced by an injection molding method. In this method, metal material powder of alloy composition consisting of 1-10wt.% Cu, 0.3-1.0wt.% C and the balance Fe with inevitable impurities is obtained by blending carbonyl Fe powder of ≤10micron average particle diameter, Cu powder of ≤20micron average particle diameter and natural graphite powder. To 91.8-92.2wt.% of the metal material powder is added 7.8-8.2wt.% of an organic binder to knead them. After the kneaded material is injection into a metal mold, the injected port is turned into a debindered port in the inert atmosphere of up to 300°C and then the debindered part is subjected to smteruig in a vacuum sintering furnace to obtain the member.
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Inventors:
Kijima Yoshio
Tatsuya Shiramoto
Tatsuya Shiramoto
Application Number:
JP22455291A
Publication Date:
April 28, 1998
Filing Date:
August 08, 1991
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
B22F1/00; B22F3/02; B22F3/12; B22F9/08; C22C38/00; C22C38/16; B22D17/00; (IPC1-7): B22F3/12; B22F1/00; B22F3/02
Domestic Patent References:
| JP53128513A |
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)