Abstract
The temperature distribution of a semi-solid slug, which determines its fraction solid distribution, is a key parameter for semi-solid die casting. No literature is, however, available regarding temperature control for a semi-solid slug produced by the Swirled Enthalpy Equilibration Device (SEED) process. This work focused on revealing the relationship between the radial temperature difference in the slug and parameters of the SEED process. A model that includes seven parameters was established to illustrate the relationship by theoretical analysis. The model was verified by finite element simulation and experimental data. Results showed that the heat-transfer coefficient of the crucible-air interface and the slug radius are the key parameters for reducing the radial temperature difference of the slug. Methods for producing a large mass of slug using an alloy with a narrow freezing range (between 35%–55% solid fraction) are discussed.
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