Process for producing alloy steel powder

Details Process for producing alloy steel powder Process for producing alloy steel powder

1982-11-05

1984-05-15

Hunt, Brooks H.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder pretreatment

419 62, 419 63, 1481261, 148 16, B22F 100

Patent

active

044487460

ABSTRACT:
A process for producing alloy steel powder, particularly, low-oxygen, low-carbon alloy steel powder is disclosed. The process comprises: preparing molten steel which contains at least one easily oxidizable element selected from the group consisting of chromium, manganese, vanadium, niobium, boron and silicon; atomizing said molten steel by means of an atomizing agent containing a non-oxidizing medium to provide as-atomized alloy steel powder containing 0.2% by weight or less of oxygen and 0.1% by weight or more of carbon; decarburizing the resulting powder by maintaining it in an atmosphere containing at least H.sub.2 and H.sub.2 O gases under specified conditions; and cooling the thus decarburized alloy steel powder to room temperature in an inert or reducing atmosphere.

REFERENCES:
patent: 2498769 (1950-02-01), Ramage
patent: 3668024 (1972-06-01), Johnson
patent: 3687654 (1972-09-01), Huseby
patent: 3725142 (1973-04-01), Huseby
patent: 3887402 (1975-06-01), Kondo et al.
patent: 4124377 (1978-11-01), Larson
Jenkins; Controlled Atmospheres for the Heat Treatment of Metals; 1946; pp. 276-278.

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