Method for the production of sintered powder ferrous metal prefo

Details Method for the production of sintered powder ferrous metal prefo Method for the production of sintered powder ferrous metal prefo

1979-09-07

1981-08-18

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75211, B22F 300

Patent

active

042844312

ABSTRACT:
A method for the production of sintered powder metal preform employing a novel reduction step. As-water-atomized ferrous metal particles are coated by phenol resins by adding said phenol resins to said ferrous metal particles after heating the metal particles to about 130.degree. C. to 150.degree. C. Resin coated ferrous metal particles are then filled in a mold and compacted under high pressure to produce a compacted green preform sufficient to ensure adequate strength for handling after pressing. The green preform is then heated to a reduction temperature within the range of about 1100.degree. C. to 1250.degree. C. for a time sufficient to achieve reduction of said green preform.

REFERENCES:
patent: Re25661 (1964-10-01), Less et al.
patent: 3148056 (1964-09-01), Brodie et al.
patent: 3264073 (1966-08-01), Schmitt
patent: 3313621 (1967-04-01), Mott
patent: 3625673 (1971-12-01), Lindquist
patent: 3811878 (1974-05-01), Chao et al.
patent: 3989518 (1976-11-01), Rueckl

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