Flux for refinement of pro-eutectic silicon crystal grains in high-silicon aluminum alloys
OwnerMasatoshi Tsudainventor
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Abstract
A grain-refining flux in the form of vitrified spheroids, ranging in diameter from about 5 to 40 mm., and consisting of, by weight, 95 - 65% of sodium hexametaphosphate and 5 - 35% of alumina. It is highly effective irrespective of the Si content of the aluminum alloy material as well as of the casting thickness. It is quite easy to handle in practical application, not producing any harmful gases, and can be safely stored owing to its lack of hygroscopicity.
Claims6
A grain-refining flux for high-silicon aluminum alloys, characterized in that it is made of a fused mixture consisting of, by weight, from about 95% to about 65% of sodium hexametaphosphate, (NaPO.sub.3).sub.6' and from about 5% to about 35% of alumina, (Al.sub.2 O.sub.3).
Dependencies are inferred from the claim text.