Abstract
The objective of this study is to improve the surface quality of the billet by applying high-frequency magnetic field electromagnetic casting technology to the continuous casting of steel. In this study, the effect of the mold shape on the steel billet surface quality was examined by a continuous casting experiment. It also researched the effects of electromagnetic field on the surface quality of the billet by observing the shape of the early-solidified shell as well as measuring the meniscus shape and mold flux consumption. Through the experiment, it was found that billet surface roughness was improved to 1/5 of the conventionally cast billets under an optimum condition. This study also discovered that a hook formed on the early-solidified shell and molten steel overflowed when an electromagnetic field was not applied. However, in the electromagnetic casting, a hook did not form in the meniscus and the early-solidified shell grew and became thin and even. The corner shape of the mold also had a great effect on the surface quality of billet's corner. In addition, it was found that mold flux consumption is increased during electromagnetic casting.
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