Powder forging process

Details Powder forging process Powder forging process

1994-12-20

1996-08-20

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 38, 419 48, B22F 316

Patent

active

055476325

ABSTRACT:
In a powder forging process, a heated green compact is placed in a stationary die and subjected to a press-forging carried out mainly to reduce the thickness thereof by cooperation of the stationary die with a movable die. The press-forging is performed at two pressing steps. After placement of the green compact into the concave molding portion of the stationary die, the pressing step were carried out. Thus, it is possible to produce a forged product having a high strength and a high toughness. A heated heat insulator also may be placed in the stationary die to provide a temperature-retaining effect to the green compact before and during pressing.

REFERENCES:
patent: 3177573 (1965-04-01), Foerster
patent: 4135922 (1979-01-01), Cebulak
patent: 4838936 (1989-06-01), Akechi
patent: 4915605 (1990-04-01), Chan et al.
patent: 5009842 (1991-04-01), Hendrickson et al.
patent: 5071474 (1991-12-01), Raybould et al.
Metals Handbook Desk Edition, American Society for Metals, Ohio, 1985, pp. 24.1-24.31.

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