Melt Conditioned Direct Chill Casting (MC-DC) Process for Production of High Quality Aluminium Alloy Billets

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Abstract:

A novel direct chill (DC) casting process, melt conditioned direct chill (MC-DC) casting process, has been developed for production of high quality aluminium alloy billets. In the MC-DC casting process, a high shear device is submerged in the sump of the DC mould to provide intensive melt shearing, which in turn, disperses potential nucleating particles, creates a macroscopic melt flow to uniformly distribute the dispersed particles, and maintains a uniform temperature and chemical composition throughout the melt in the sump. Experimental results have demonstrated that, the MC-DC casting process can produce aluminium alloy billets with significantly refined microstructure and reduced cast defects. In this paper, we give an overview of the MC-DC casting process and report on results obtained from an industrial scale trial.

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Periodical:

Materials Science Forum (Volumes 794-796)

Pages:

149-154

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Online since:

June 2014

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[1] J. Polmear; Light Alloys, Metallurgy of the light metals, 3rd edition, (1995).

Google Scholar

[2] D .G. Eskin; Physical metallurgy of direct casting of Aluminium alloys, CRC press, Taylor and Francis Group, 2008, p.9.

Google Scholar

[3] D. G. McCartney; Grain refining of Aluminium and its alloys using inoculants, Inter. Mater. Rev. 34, 1989, p.247.

DOI: 10.1179/imr.1989.34.1.247

Google Scholar

[4] Z. Fan, M. Xia, H. Zhang, G. Liu, J.B. Patel, Z. Bian, I. Bayandorian, Y. Wang, H.T. Li and G.M. Scamans; Melt conditioning by advanced shear technology (MCAST) for refining solidification microstructures, Int. J. Cast Met. Res., 22, 2009, pp.103-107.

DOI: 10.1179/136404609x367443

Google Scholar

[5] Z. Fan, Y.B. Zuo, and B. Jiang; A new technology for treating liquid melts with intensive melt shearing, Mater. Sci. Forum, 690, 2011, p.141.

DOI: 10.4028/www.scientific.net/msf.690.141

Google Scholar

[6] Z. Fan, Y.B. Zuo and B. Jiang; Apparatus and method for liquid metals treatment, Application No. 1015498. 7, 2010, UK Patent.

Google Scholar

[7] J.D. Hunt; Steady state columnar and equiaxed growth of dendrites and eutectic, Mat. Sci. Eng. A, Vol. 65, 1984, p.75.

DOI: 10.1016/0025-5416(84)90201-5

Google Scholar

[8] A. Das, S. Ji and Z. Fan; Morphology development of solidification structures under forced fluid flow: a Monte-Carlo simulation, Acta Mater., 50, 2002, pp.4571-4585.

DOI: 10.1016/s1359-6454(02)00305-1

Google Scholar

[9] H.T. Li, Y. Wang and Z. Fan; Mechanisms of enhanced heterogeneous nucleation during solidification in binary Al-Mg alloys, Acta Mater., 60, 2012, pp.1528-1537.

DOI: 10.1016/j.actamat.2011.11.044

Google Scholar