Effect of Casting Condition on Refinement of Primary Crystals in Hypereutectic Al-Si Alloy Ingots Produced by Duplex Casting Process

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Abstract
The primary silicon crystals of hypereutectic Al-Si alloy are refined by the Duplex Casting process． In this process， two kinds of alloy melts， i．e． the first alloy with a relatively low liquidus temperature and 狽??@second alloy with a relatively high liquidus temperature， are cast in a mold in sequence at a given time