Method of making a through-hardened scale-free forged powdered m

Details Method of making a through-hardened scale-free forged powdered m Method of making a through-hardened scale-free forged powdered m

1973-09-24

1977-01-11

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

148126, B22F 300

Patent

active

040024717

ABSTRACT:
A method of making forged powdered iron base metal articles of high Rc hardness without need for further machining, surface treatment nor heat treatment after quenching comprising forming a pre-alloyed metal powder, compressing said powder into a briquette, sintering said briquette into a preform, heating said preform to a temperature above its austenizing temperature, forging said preform while above its austenizing temperature into a forged article, permitting the article to cool to approximately its austenizing temperature, and promptly quenching said forged article in a quenching batch.

REFERENCES:
patent: 3416976 (1968-12-01), Brill-Edwards
patent: 3658604 (1972-04-01), Hale
patent: 3810756 (1974-05-01), Koehler
Call, Powder Metallurgy, 1970, vol. 13, No. 2b, pp. 156-164.
Brown et al, Int. J. Pow. Met., vol. 6, No. 4, Oct. 1970, pp. 29-42.
Hirschhorn et al, Metal Forming, Nov. 1970, vol. 37, No. 1, pp. 320-327.
Mott, Precision Metal Molding, Oct. 1952, vol. 10, No. 10, pp. 38-39, 89, 90-94.

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