Dispersion-strengthened heat- and wear-resistant aluminum alloy

Details Dispersion-strengthened heat- and wear-resistant aluminum alloy Dispersion-strengthened heat- and wear-resistant aluminum alloy

1984-12-19

1988-02-02

Terapane, John F.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75233, 75234, 75235, 75236, 75237, 75241, 75243, 75244, 419 32, 419 38, 419 42, C22C 2902, C22C 2906, C22C 2912, C22C 2916

Patent

active

047227516

ABSTRACT:
A light weight and high strength aluminum alloy and a process for producing such an alloy, which alloy is suitable for forming automotive engine components, including pistons. In a preferred embodiment, 80 to 99.5% by volume of an aluminum alloy powder or a mixed powder composed of pure metal powders or master alloy powders is blended with 0.5 to 20% by volume of at least one of carbon or graphite powder, an oxide powder, a carbide powder and a nitride powder. The blend is then mechanically alloyed, following which the thereby-obtained powder is subjected to working such as by compaction and hot forging, hot pressing, cold isostatic pressing and hot forging, or cold isostatic pressing and hot extrusion. By the use of mechanical alloying, the advantages of a rapidly solidified powder having a supersaturated solid solution and uniform fine crystal grains are attained, and the effect of dispersion-strengthening is brought about by the addition of dispersion particles to the micro structure of the rapidly solidified powder.

REFERENCES:
patent: 2974039 (1961-03-01), Deventer et al.
patent: 3791800 (1974-02-01), McGee
patent: 3816080 (1974-06-01), Bomford et al.
patent: 3961945 (1976-06-01), Sanders et al.
patent: 4156053 (1979-05-01), Baranow

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