Process for preparing iron based powder for powder metallurgical

Details Process for preparing iron based powder for powder metallurgical Process for preparing iron based powder for powder metallurgical

1979-05-07

1980-12-09

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

148126, B22F 102

Patent

active

042382211

ABSTRACT:
A process for manufacturing iron-based powder to be used for powder metallurgical manufacturing of precision components having good accuracy to size and high strength. In accordance with the process, a mixture of substantially only iron powder and an alloying powder of copper and/or reducible copper compounds is prepared. The mixture is then subjected to annealing treatment in a reducing atmosphere at a temperature between 700.degree. C. and 950.degree. C. for a period of 15 minutes to 10 hours. Preferably the time period is 0.5 to 5 hours. The alloying powder is adhered to the iron powder by diffusion. The cake thus obtained is ground to an iron powder diffusion alloyed with copper and the copper alloyed iron powder thus obtained is mixed with pure iron powder in such an amount that the mixture obtains the intended copper content.

REFERENCES:
patent: 2754194 (1956-07-01), Graham et al.
patent: 3583864 (1971-06-01), Adler
patent: 3853572 (1974-12-01), Herron et al.
patent: 3901661 (1975-08-01), Kondo et al.

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