Strontium-aluminum intermetallic alloy granules

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

1998-11-10

2000-10-17

Ip, Sikyin

Metal treatment

Stock

Aluminum base

420549, 420528, 75249, C22C 2100

Patent

active

061325309

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.

REFERENCES:
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patent: 4576791 (1986-03-01), Thistlethwaite
patent: 5045110 (1991-09-01), Vader et al.
patent: 5205986 (1993-04-01), Noordegraaf et al.
Gruzleski et al, "The Treatment of Liquid-Aluminum-silicon alloys," The American Foundrymen's Society, Inc., pp. 31-39.
Pekguleryuz et al, "Conditions for Strontium Master Alloy . . . ," Trans. Am. Foundrymen's Soc., No. 96, pp. 55-64 (1988); XP002042477.
Pekguleryuz, M.O., "Strontium dissolution in Liquid Aluminum . . . ," Diss. Abstr. Int., vol. 48, No. 10, p. 3093-B (1988); XP002042478.

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