Strontium-aluminum intermetallic alloy granules

Details Strontium-aluminum intermetallic alloy granules Strontium-aluminum intermetallic alloy granules

1996-06-28

1999-03-16

Ryan, Patrick

Metal treatment

Stock

Aluminum base

420549, 420528, 75249, C22C 2100

Patent

active

058824430

ABSTRACT:
Aluminum-strontium enriched master alloy granules for use primarily in modifying the eutectic phase in aluminum-silicon casting alloys. The master alloy granules are predominantly intermetallic compounds Al.sub.4 Sr, Al.sub.2 Sr or Alsr and mixtures thereof. By using such intermetallic dominant alloys in a granulated state rapid dissolution in aluminum-silicon alloy melts is achieved. The master alloy composition can be directly added to a content of the melt or injected into it. The master alloy composition can also be mixed with aluminum granules and extruded into a rod or entrained into a billet of cast aluminum.

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Pekguleryuz et al, "Conditions for strontium master alloy addition to A356 melts," Trans. Am. Foundrymen's Soc., No. 96, pp. 55-64 (1988).
Pekguleryuz, M.O., "Strontium Dissolution in Liquid Aluminum and A356 Alloys," Diss. Astr. Int., vol. 48, No. 10, p. 3093-B (1988).
J.E. Gruzleski et al. "The Treatment of Liquid Aluminum-silicon alloys", The American Foundrymen's Society, Inc. pp. 31-39.
E.M. Levin et al. "Phase diagrams for ceramists" The American Ceramic Society, Columbus, Ohio, USA, pp. 9-14.

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