Method of continuous casting of molten metal
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United States of America Patent
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Sep 24, 2002
Grant Date -
Jun 28, 2001
app pub date -
Dec 15, 2000
filing date -
Dec 28, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of continuously casting molten metal has the step of feeding molten metal into a mold to produce a casting continuously while generating an electromagnetic field in the mold by applying a high frequency to the mold. The application of the high frequency is controlled in such a manner that a magnitude of an electromagnetic field which is applied to a solidification shell forming start location of the mold becomes equal to or greater than a minimum required flux density to be applied to the mold. The minimum required flux density is determined according to the following equation: ##EQU1## B.sub.min : minimum required flux density (gauss) t.sub.n : negative time strip (second) f: frequency in electromagnetic field (kHz) v: casting velocity (m/sec) f.sub.m : number of oscillation or frequency of mold (Hz) a: one-way stroke of mold (m).
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