Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1977-03-30
1978-11-21
Schafer, Richard E.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75214, 75223, 75224, 75225, 75226, 425 78, B22F 314
Patent
active
041264517
ABSTRACT:
A powder-metallurgy process, product, and assembly particularly adapted for manufacturing plates of hard-to-work materials, such as chromium and its alloys, are disclosed. The assembly is formed by placing a metal powder into the cavity of a die and disposing one punch or two opposed punches to intrude into the cavity and enclose the powder. Preferably, the powder is compacted by applying pressure to the punches, and the punches are fixed to the die with their outer ends protruding from the die. The enclosed powder may be purified, outgassed, and sealed under vacuum. The enclosed powder is consolidated and elongated by heating and compressing, preferably by rolling one or more times in a conventional rolling mill. The composite product is cooled slowly and cut to the desired size. Remnants of the die and punch may serve as frame and backing for the consolidated powder layer. The plates have application, for example, as sputtering targets.
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Airco, Inc.
Bopp Edmund W.
Cassett Larry R.
Draegert David A.
Schafer Richard E.
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