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Title: Melt conditioned direct chill casting (MC-DC) of wrought Al-alloys
Authors: Hagheyghi, R
Liu, Y
Fan, Z
Keywords: Melt conditioning; direct chill casting; solidification; aluminium alloy
Issue Date: 2008
Publisher: Trans Tech Publications
Citation: Solid State Phenomena. 141-143(2008) 403-408.
Abstract: 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 Aland 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.
Appears in Collections:Materials Engineering
Brunel Centre for Advanced Solidification Technology (BCAST)

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