Evaluation of basic parameters in a mold oscillationless electromagnetic casting

The penetration of a mold flux between a mold and a molten metal which is d riven by a mechanical mold oscillation is indispensable for a continuous ca sting of steel. In this paper a new continuous casting process in which the function of mold oscillation is replaced by an electromagnetic force has b een proposed. The basic parameters in the new process were evaluated in a m odel experimental work using a molten gallium and the penetration behavior of a mold flux was visualized by use of a high-speed video camera. The non- contacting distance caused at meniscus by the electromagnetic force and the consumption of the mold flux in a continuous casting of a molten tin were measured. It is found that the non-contacting distance which is formed by i mposing an intermittent alternating magnetic field under net mechanical mol d oscillation nearly agrees with the minimum stroke length of the mold osci llation which is required for the success of the continuous casting of a mo lten tin. Surface quality of cast billets was improved by increasing the co nsumption of the mold flux and by adjusting the intermittent frequency of t he magnetic field to the optimum one existing near the intrinsic frequency of a molten pool.