1992 Volume 78 Issue 3 Pages 455-462
A new process to control the side edge shape of molten metal puddle is proposed in which direct electric field imposed in the casting direction and direct magnetic field applied between rolls induce electromagnetic force in molten metal puddle. The experimental works were carried out to clarify the possibilities of holding molten metal at side edge and of controlling the side edge shape by the electromagnetic force. It was found that the holding height of meniscus can be controlled by the direct electric current as an operating parameter. This method to hold molten metal at side edge is named an electromagnetic dam. And it was noticed that, at the same time, the saw shape edge on cast sheet, which is attributed to the instability of meniscus, becomes smooth by the function of electromagnetism. This effect stabilizing the edge shape was explained qualitatively by considering the characteristics of electromagnetic force. The experimental data verified the mathematical model of the electromagnetic dam which can predict the holding height of meniscus position of molten metal puddle from electric current and magnetic field.
