Strontium-bearing master composition for addition to eutectic an

Details Strontium-bearing master composition for addition to eutectic an Strontium-bearing master composition for addition to eutectic an

1977-01-28

1978-08-22

Dean, R.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

29420, 75134A, 75134S, 75228, 75249, 75255, 75256, 264111, C22C 103

Patent

active

041086465

ABSTRACT:
A master composition for modifying the eutectic component of eutectic and hypo-eutectic silicon-aluminum casting alloys comprises an intimate admixture, in powder or compact form, of a) particles of strontium-silicon and, in certain case, b) particles of an aluminous material, e.g., aluminum. The modification of the silicon-aluminum casting alloys is achieved by adding to the alloy while the alloy is in molten form an effective amount of the master composition, e.g., such as to introduce between about 0.005 and 0.4 percent by weight of strontium into said alloy.

REFERENCES:
patent: 3466170 (1969-09-01), Dunkel et al.
patent: 3567429 (1971-03-01), Dunkel et al.

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