Abstract
During solidification, the mathematical analysis of heat flow depends on the transient heat transfer coefficient at the metal/mold interface. The analysis of heat transfer behavior along a cylindrical section is necessary for a better control of solidification in conventional foundry and continuous casting processes. For this purpose, a water-cooled experimental apparatus was developed, and experiments were carried out with Sn–Pb alloys with different melt superheats. The heat transfer coefficients were determined by a theoretical–experimental fit of thermal profiles (IHCP). The results have shown a variation in heat flow conditions along the metal/mold interface provoked by the action of solidification thermal contraction connected with the gravitational effect. In macrostructural terms, this effect was evident with an asymmetric structure due to the variation of metal/mold thermal contact along the cylinder cross section. Experimental equations correlating heat transfer coefficients as a power function of time along the cross section of cylindrical horizontal castings of Sn–Pb alloys are proposed.
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