Finite element analysis of liquid ejection in continuously cast slab by sequential forging

Since segregation occurs at the central part of the continuously cast slab, it is desirable to eject the liquid in the centre during solidification by sequential forging. The deformation behaviour of continuously cast slab during forging is simulated by the finite element method. A model experiment using paraffin wax is also carried out to compare with the theoretical result. The model experiment shows that the liquid may be trapped in the slab during the successive forging process, depending on the striking interval, even when the reduction in thickness is larger than the initial thickness of the liquid part. The calculated profile of the interface between the solid and the liquid parts is wavier and the solid part is deformed more as the striking interval increases. The calculated maximum thickness of the liquid part after forging agrees qualitatively well with the experimental one. The predicted maximum striking interval without liquid trapping in the forging process agrees well with the experimental one.