コールドクルーシブルレビテーション溶解

概要

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A fundamental experiment concerning levitation melting was carried out using a 60kW-30kHz generator. A water cooled copper crucible, cold crucible, which enables levitation of metal was set in the induction heating coil.Various kinds of solid spherical metals (aluminum, copper, stainless steel, carbon steel and titanium) were successfully levitated in a conical cold crucible. The levitation height of the metal was found to depend on the density of the metal and the electric power, but not to so strongly depend on the diameter and electric conductivity of the metal.Some kinds of reactive and refractory metals weighing 60 to 160g were easily melted in a cylindrical cold crucible. The equilibrium temperature of molten molybdenum reached approximately 200°C above the melting point.The cold crucible levitation melting technology is thought to be realized at an industrial scale in the near future.
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