발간논문

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Vol.36, No.10, 1598 ~ 1605, 1998
Title
Electromagnetic Field Effect on the Surface Quality of Continuously Cast Billet
박준표 , 정희태 , 심동준 , 김호영 Joon Pyo Park , Hee Tae Jeong , Dong Joon Sim , Ho Young Kim
Abstract
Electromagnetic casting(EMC) technology of a soft contact type with high frequency electromagnetic field has been examined for steel application. A special copper mold of cold crucible type was fabricated and usage of cold insert was established to analyze and predict the effect of the operating parameters. The continuous casting experiments with tin were conducted to quantify the electromagnetic field effect on the surface quality of the billet. The result shows that the surface roughness was improved to the 1/10 of the conventionally cast billet for the optimal electric power. The optimum value of the electric power was heavily dependent on the relative position of the meniscus and the coil top. It was also observed that the electromagnetic casting made the solidified shell thinner near the meniscus and made it thicker just below the mold than the conventional casting. The postulate that EMC is an effective tool on preventing the hook formation at the early solidifying stage was confirmed.
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