A new melt conditioned direct chill (MC-DC) casting process has been developed for producing high quality magnesium alloy billets and slabs. In the MC-DC casting process, intensive melt shearing provided by a high shear device is applied directly to the alloy melt in the sump during DC casting. The high shear device provides intensive melt shearing to disperse potential nucleating particles, creates a macroscopic melt flow to distribute uniformly 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 magnesium alloy billets with significantly refined microstructure and reduced cast defects. In this paper, we introduce the new MC-DC casting process, report the grain refining effect of intensive melt shearing during the MC-DC casting process and discuss the grain refining mechanism.
CITATION STYLE
Zuo, Y. B., Jiang, B., Zhang, Y., & Fan, Z. (2012). Melt conditioned DC (MC-DC) casting of magnesium alloys. In Magnesium Technology (pp. 155–160). Minerals, Metals and Materials Society. https://doi.org/10.1007/978-3-319-48203-3_29
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