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US 6,136,108 AGranted
Strontium master alloy composition having a reduced solidus temperature and method of manufacturing the same
AssigneeKB Alloys, Inc.
InventorsGary W. Boone, Philip G. Vais, Daniel B. Franklin
Life of this patent
Estimating the term…
Abstract
Master alloy with 20-80% strontium, preferably 0.01-2.0% of aluminum and/or copper, and the balance essentially zinc plus impurities, and a method for preparing same and a method for modifying the microstructure of nonferrous alloys with said master alloy.
Claims7
A process for preparing a master alloy, which comprises:
- preparing a master alloy consisting essentially of in weight percent between 20-80% strontium, with the balance being zinc plus impurities;
- wherein said preparing step includes the steps of providing a molten metal bath containing zinc and from in weight percent 0.01-2.0% each of a material selected from the group consisting of aluminum, copper and mixtures thereof;
- and adding the requisite amount of strontium to the molten metal bath, thereby reducing losses due to oxidation.
A process according to claim including the step of casting said master alloy to a cast product and thereby reducing oxidation on the surface of the cast product.
Dependencies are inferred from the claim text.