Powder-metallurgical production of a workpiece from a heat-resis

Details Powder-metallurgical production of a workpiece from a heat-resis Powder-metallurgical production of a workpiece from a heat-resis

1987-08-11

1988-04-12

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder shape or size characteristics

419 33, 419 39, 419 48, 419 67, 75 05BA, 75249, B22F 100

Patent

active

047373393

ABSTRACT:
A workpiece consisting of a heat-resistant aluminum alloy is produced by a powder-metallurgical process wherein an alloy containing 8 to 14% by weight Fe, 0.5 to 2% by weight V and 0.2 to 1% by weight Mn is melted, the melt is cooled in a gas stream at a rate of at least 10.sup.5 .degree.C/s and is atomized to form particles having a diameter of 1 to 40 .mu.m, whereupon the powder is consolidated a temperature of 350.degree. to 450.degree. C. at a pressure of 2000 to 6000 bar, to form a pressed article. In this process, the intermetallic compound Al.sub.6 Fe stabilized by Mn occurs in fine distribution. This dispersoid imparts high ductility and toughness to the grain.

REFERENCES:
patent: 4127426 (1978-11-01), Nicoud
patent: 4347076 (1982-08-01), Ray et al.
patent: 4435213 (1984-03-01), Hildeman et al.
patent: 4647321 (1987-03-01), Adam

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