Abstract
Heat transfer and solidification kinetics in the meniscus region during casting have been examined using a two-dimensional transient heat-flow analysis. The effects of the various parameters involved were assessed by determining the variation in position with time of a rigid, partially solidified interface. For normal conditions when casting in a chill mould, solid was found to grow over the meniscus at a very early stage. Heat extraction by the mould was then the controlling factor. It was predicted that changes in superheat and alloy composition would produce significant changes in the amount of solid formed over the meniscus, while heat lost to the melt cover and meniscus height became important only if the changes were extreme. The results of the predictions are in agreement with experimental observations reported previously. It is concluded from these findings that the meniscus-solidification mechanism can successfully account for the occurrence of surface rippling during static and continuous casting.
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