Apparatus For Continuous Casting of Magnesium Billet or Slab Using Electromagnetic Field and the Method Thereof
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United States of America Patent
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Issued Date -
Jul 31, 2008
app pub date -
Dec 22, 2005
filing date -
Dec 23, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus for continuous casting of magnesium billets or slabs using an electromagnetic field, and a method thereof compensates small solidification latent heat of magnesium, controls a solidification speed, and stirs molten metal within a mold via an electromagnetic field, thereby enabling continuous casting. The apparatus comprises a mold for continuous casting an as-cast billet or slab, a coil positioned outside the mold and adapted to allow electric current to be applied thereto, and a cooling nozzle positioned outside the mold and the as-cast billet or slab. During casting, electric current having a frequency of 2.about.1,000 D or electric current of 50.about.10,000 A having a frequency of 200.about.200,000 D is applied to the coil. A magnesium billet or slab having enhanced inner quality can be produced at a high casting speed without surface defects by applying a low frequency or high frequency electromagnetic field to the mold during continuous casting of magnesium.
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