Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1979-09-07
1981-02-03
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75138, C22C 103
Patent
active
042486300
ABSTRACT:
A method of adding alloying elements, including highly reactive metals such s lithium, to molten aluminum so that the normally occurring oxidation reaction of such elements with the atmosphere is minimized. After adding all alloying elements, except the highly reactive metals, to the molten aluminum, and after the alloyed melt has been subjected to a degassing and filtering process, the reactive metals are introduced in a mixing crucible as the final step prior to the casting operation. The desired concentration of reactive metal in the melt is achieved by controlling the relative amounts of reactive metal and alloyed melt. Uniformity of the mixture is controlled by mechanical stirring. The alloyed metal is then cast into ingots.
REFERENCES:
patent: 3895937 (1975-07-01), Gjosteen et al.
patent: 4080200 (1978-03-01), Sheridan
patent: 4138246 (1979-02-01), Buxmann et al.
Andrews M. J.
Sciascia R. S.
Sheinbein Sol
The United States of America as represented by the Secretary of
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