Alloys or metallic compositions – Aluminum base – Silicon containing
Patent
1988-10-24
1991-10-08
Dean, R.
Alloys or metallic compositions
Aluminum base
Silicon containing
148437, 420552, C22C 103
Patent
active
050552562
ABSTRACT:
Disclosed is an Al-Ti-B master alloy especially designed to grain refine cast aluminum alloys containing silicon. The alloy composition goes contrary to present known art. Present commercial master alloys contain a ratio of Ti to B exceeding 2.2 to promote a mixture of TiB.sub.2 and TiAl.sub.3 crystals. This invention provides an Al-Ti-B alloy wherein the Ti to B ratio is 1. It contains a preponderance of mixed boride crystals. The optimum composition of the alloy of this invention is Al-3Ti-3B.
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Guzowski Matthew
Sigworth Geoffrey
Dean R.
KB Alloys, Inc.
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