Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1974-05-20
1976-05-04
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75146, 75147, C22C 2300, C22C 1800, C22C 3300
Patent
active
039544559
ABSTRACT:
A metal composition characterized by degenerate dendritic or nodular primary discrete solid particles suspended in a secondary phase having a lower melting point than the primary particles and which secondary phase can be solid or liquid. The method involves raising the temperature of a metal alloy to a value at which the alloy is largely or completely in the molten state. The melt then is subjected to vigorous agitation and the temperature is reduced to increase the portion of the mixture in solid degenerate dendrite or nodular form up to about sixty-five percent, but usually up to about fifty percent, while continuing the agitation. At this juncture the temperature of the liquid-solid composition can be reduced to cause solidification thereof or it can be cast. The solidified composition can be stored and later it can be brought again to the liquid-solid mixture state and then recast.
REFERENCES:
patent: 2793949 (1957-05-01), Imich
patent: 3289444 (1965-06-01), Olds
patent: 3300296 (1967-01-01), Hardy
patent: 3620686 (1971-11-01), Pfann
patent: 3840364 (1974-10-01), Flemings
Flemings Merton C.
Mehrabian Robert
Spencer David B.
Massachusetts Institute of Technology
Rosenberg Peter D.
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