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Vol.36, No.6, 924 ~ 936, 1998
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| Title |
| Numerical Analysis of Magnetic Field, Fluid Flow, and Heat Transfer Induced by Traveling Magnetic Field in a Round DC Casting Mold |
| 정순효 S. H. Chung , 조영환 Y. W. Cho , 심재동 J. D. Shim |
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| Abstract |
| The electromagnetic stirring of molten metal in the continuous casting mold is one of the most effective tools to decrease various casting defects such as macrosegregation, center cracks, and to homogenize the grain structure of the ingots. For DC casting of large diameter aluminium billets, it is important to control molten metal flow and heat transfer in order to prevent the formation of center cracks and macrosegregation. A circular inductor with minimum height producing travelling magnetic field in vertical direction has been designed with the help of a 3D numerical simulation program. The electromagnetic field, fluid and heat flows have been analysed by the numerical calculation and physical model experiment. The results of calculation agreed very well with those of experiment. It has been found that the downward stirring near the mold wall seems more efficient to homogenize the melt than the upward stirring. An optimized inductor design for stirring aluminium melt in the DC casting mold of 240 mm inner diameter have been proposed based on the result of the numerical calculation. |
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| Key Words |
| Round DC casting mold, Traveling magnetic field, Numerical analysis, Magnetic field, Fluid flow, Heat transfer, Physical model experiment |
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