High density ferrous power metal alloy

Details High density ferrous power metal alloy High density ferrous power metal alloy

1994-09-30

1997-03-18

Jordan, Charles T.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 11, 419 45, 419 55, 419 59, 75243, 428551, B22F 100

Patent

active

056131801

ABSTRACT:
A method for producing high density and/or high surface density ferrous powder metal parts has the steps of: compacting a iron-containing powder substantially free of graphite at room temperature and at about 40-50 tsi; sintering the green compact in an inert, non-oxidizing environment at a temperature of about 2050.degree.-2300.degree. F.; repressing the sintered compact at room temperature at about 60 tsi; carburizing the repressed compact at high temperature to form a layer of relatively high carbon concentration to a depth of at least about 0.010 inches; and immediately quenching the hot carburized compact followed by a tempering treatment.

REFERENCES:
patent: 2191936 (1938-02-01), Lenel
patent: 2333573 (1942-11-01), Kalischer
patent: 2411073 (1946-11-01), Whitney
patent: 2489839 (1949-11-01), Whitney
patent: 2827407 (1958-03-01), Carlson et al.
patent: 5476632 (1995-12-01), Shivanath et al.
patent: 5512326 (1996-04-01), Jones et al.
patent: 5516483 (1996-05-01), Sivanath et al.

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