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MOTION OF MELT IN CONTINUOUSLY CASTING MOLD AND SURFACE QUALITY OF INGOT UNDER INTERMITTENT HIGH FREQUENCY MAGNETIC FIELD Ⅰ. Effect of the Motion of Melten Meniscus on Surface Quality of Ingot |
LI Tingju(Dalian University of Technology; Dalian 116023); SASSA Kensuke; ASAI Shigeo(Nagoya University; Nagoya 464-01; Japan) |
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Cite this article:
LI Tingju(Dalian University of Technology; Dalian 116023); SASSA Kensuke; ASAI Shigeo(Nagoya University; Nagoya 464-01; Japan). MOTION OF MELT IN CONTINUOUSLY CASTING MOLD AND SURFACE QUALITY OF INGOT UNDER INTERMITTENT HIGH FREQUENCY MAGNETIC FIELD Ⅰ. Effect of the Motion of Melten Meniscus on Surface Quality of Ingot. Acta Metall Sin, 1997, 33(5): 524-528.
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Abstract In order to eliminate the surface defects of continuously casting metals, a casting process imposing an intermittent high frequency magnetic field from the outside of the mold is developed. Effect of the intermittent magnetic field on the motion of a molten gallium in a continuously casting mold, used as the simulator of a molten steel, was investigated by a laser level sensor. The relation between meniscus motion and surface quality was studied by continuously casting tin. It is found that the motion of the melt in the mold can be suppressed and the surface quality of the ingot can be improved by imposing intermittent magnetic field.It is noticed that the surface ripples corresponding to intermittent frequency, fi was formed on the ingot surface, and when fi is close to the intrinsic frequency of the experimental system, the effect of imposing magnetic field is the best.
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Received: 18 May 1997
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