間欠型交流磁場印加下の溶融金属表面挙動の直接観察

概要

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In continuous casting, the free surface motion of a molten metal plays an important role for determining the surface quality of products. In order to clarify the free surface behavior of a molten metal under the imposition of an intermittent alternating magnetic field, free surface waves of a molten gallium were visualized and recorded by use of a high-speed video camera. It is noticed that the number of capillary waves generated in the radial direction increased with increase of the intermittent frequency and was decreased by inserting a copper shield between a coil and a mold. The number of the waves generated in the azimuthal direction decreased during propagating from the vicinity of a sidewall to the center. Asymmetric gravity waves were excited when the distribution of the magnetic field was non-uniform in the azimuthal direction or the intermittent frequency was adjusted near the resonance frequency.
社団法人日本鉄鋼協会の論文