Abstract
The ESR core remelting process has been attractive for manufacturing of large monoblock ingots or composite ingots, but it has not been put into a practical use. The reason may be that the peripheral penetration depth of a shell was not uniform.In this paper, to overcome this problem, effects of shell rotation and electro-magnetic stirring on the shell penetration were studied. The results were as follows.(1) The periphral penetration depth was made much uniform by applying shell rotation or magnetic stirring.(2) Under the same remelting conditions, the penetration depth became smaller by applying rotation or magnetic stirring.(3) Rotation or magnetic stirring resulted in increase of the electrode melting rate.(4) By applying the phenomena described in (3) and by combining the shell rotation speed appropriately, the shell penetration depth was made almost uniform both along the peripheral direction and longitudinal direction.
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