Hi-density sintered alloy and spheroidization method for pre-all

Details Hi-density sintered alloy and spheroidization method for pre-all Hi-density sintered alloy and spheroidization method for pre-all

1995-06-29

1996-09-03

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Plural heating steps including sintering

419 23, 419 11, 419 28, 419 32, 419 36, 419 39, 419 38, 419 96, 419 58, 419 60, B22F 317

Patent

active

055521096

ABSTRACT:
This invention relates to a process of forming a sintered article of powder metal comprising blending graphite and lubricant with a pre-alloyed iron based powder, pressing said blended mixture to shape in a single compaction stage sintering said article, and then high temperature sintering said article in a reducing atmosphere to produce a sintered article having a density greater than 7.4 g/cc.

REFERENCES:
patent: 3798022 (1974-03-01), Le Brasse et al.
patent: 3901661 (1975-08-01), Kondo et al.
patent: 4014680 (1977-03-01), Reen
patent: 4028094 (1977-06-01), Reen et al.
patent: 4069044 (1978-01-01), Mocarski et al.
patent: 4251599 (1981-02-01), McCormick
patent: 5069714 (1991-12-01), Gosselin
patent: 5108493 (1992-04-01), Causton
patent: 5403371 (1995-03-01), Engdahl et al.

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