Powder metallurgical process for producing a copper-based shape-

Details Powder metallurgical process for producing a copper-based shape- Powder metallurgical process for producing a copper-based shape-

1981-07-27

1983-10-18

Hunt, Brooks H.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Heat and pressure simultaneously to effect sintering

148 115C, 148 115P, B26D 520, C21D 800

Patent

active

044104880

ABSTRACT:
Shape-memory alloys comprised of Cu/Al or Cu/Al/Ni are produced by a powder metallurgical process wherein a coarse-grained powder of pre-alloyed and/or pre-mixed powder alloys having a grain size of 0.05 to 0.8 mm is introduced into a metal container which is then evacuated, sealed, and hot isostatically pressed. The resulting billet is then hot worked. In another embodiment, the powder is first placed in a rubber tube and cold isostatically pressed. The billet is then placed in a cylinder having deformable walls, such as a copper cylinder, the cylinder is sealed, and the powder therein is then hot isostatically pressed, and the billet so prepared is subjected to a homogenization heat treatment and hot working.

REFERENCES:
patent: 3700434 (1972-10-01), Abkowitz et al.
patent: 3775101 (1973-11-01), Freche et al.
patent: 4094053 (1978-06-01), Weaver
patent: 4140528 (1979-02-01), Hebeisen et al.
Lenel, Powder Metallurgy, N.J., Metal Powder Industries Federation, 1980, pp. 143-153.
Goetzel, Treatise on Powder Metallurgy, V. 2, Interscience Publishers Inc., N.Y., 1950, pp. 643-646 & 658-666.

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