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Fluxing agent for metal cast joining

United States Patent

6,474,397
November 5, 2002
View the Complete Patent at the US Patent & Trademark Office
A method of joining an aluminum cast member to an aluminum component. The method includes the steps of coating a surface of an aluminum component with flux comprising cesium fluoride, placing the flux coated component in a mold, filling the mold with molten aluminum alloy, and allowing the molten aluminum alloy to solidify thereby joining a cast member to the aluminum component. The flux preferably includes aluminum fluoride and alumina. A particularly preferred flux includes about 60 wt. % CsF, about 30 wt. % AlF.sub.3, and about 10 wt. % Al.sub.2 O.sub.3.
Gunkel; Ronald W. (Lower Burrell, PA), Podey; Larry L. (Greensburg, PA), Meyer; Thomas N. (Murrysville, PA)
Alcoa Inc. (Pittsburgh, PA)
09/ 766,023
20020189780
January 19, 2001
This invention was made with government support under Contract No. 86X-SU545C awarded by the Department of Energy. The government has certain rights in this invention.