Melt Conditioned Direct Chill Casting (MC-DC) of Wrought Al-Alloys

Abstract:

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Melt Conditioned Direct Chill (MC-DC) casting is a new development for producing high-quality billets and slabs. In the MC-DC process, liquid metal is continuously fed into a MCAST (melt conditioning by advanced shear technology) machine, where the liquid metal is subjected to high shear rate and high degree of turbulence provided by a twin screw mechanism at temperatures either above or below the alloy liquidus, and the conditioned liquid metal is then fed continuously into a Direct Chill (DC) caster to produce billets or slabs. The MC-DC process is applicable to both Al- and Mg-alloys. In this paper we present our experimental investigations of the effects of processing parameters on the microstructural and compositional uniformity of 5xxx and 7xxx series Al-alloys. It has been confirmed by our experiments that the MC-DC process can produce billets and slabs with fine and uniform microstructure, uniform chemical compositions and much reduced cast defects, such as porosity and cracks.

Info:

Periodical:

Solid State Phenomena (Volumes 141-143)

Edited by:

G. Hirt, A. Rassili, A. Bührig-Polaczek

Pages:

403-408

DOI:

10.4028/www.scientific.net/SSP.141-143.403

Citation:

R. Haghayeghi et al., "Melt Conditioned Direct Chill Casting (MC-DC) of Wrought Al-Alloys", Solid State Phenomena, Vols. 141-143, pp. 403-408, 2008

Online since:

July 2008

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Price:

$35.00

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