1991 Volume 77 Issue 9 Pages 1434-1441
A new process to control the side edge shape of molten metal puddle is proposed in which direct electric field imposed between rolls and direct magnetic field applied in the casting direction 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 using the shape control function of electromagnetism the saw shape edge on cast sheet, which is attributed to the instability of meniscus, becomes smoother than that obtained by the previously proposed process in which only direct magnetic field was imposed to suppress the saw shape edge. The experimental data verify the mathematical model of the electromagnetic dam which can predict the holding height of meniscus position of molten metal puddle from electric current, magnetic field and casting velocity.
