Experimental investigation of heat transport and solidification during low frequency electromagnetic hot-top casting of 6063 aluminum alloy

On the basis of conventional hot-top casting and casting, refining and electromagnetic process (CREM), a lower frequency electromagnetic field was applied during the hot-top casting process. Thermocouples (type K) were introduced into the metal to study the temperature profile in the ingot after a steady-state was reached. Two thermocouples were placed into the graphite ring to study the effect of low frequency electromagnetic field on the temperature of graphite ring. The experimental results show that under the effect of the low frequency electromagnetic filed, the heat transfer between the ingot and the mold is intensified; the length of contact zone with graphite ring decreases, the temperature profile in the ingot is modified, and the ingot with fine and homogeneous macrostructure is obtained.