Application of a chamfer technology to overcome bulging deformation of slab narrow side during mechanical reduction process

It has long been established that the mechanical soft reduction (MSR), especially the heavy reduction (HR), can effectively eliminate the internal defects of as-cast slabs. However, the bulging deformation of as-cast slab is inevitably occurred induced by the mechanical reduction rolls, and the level of the bulging deformation is dramatically increased with increasing the reduction amounts. Here, we employed a modified slab corner shapes to overcome the bulging deformation of slab narrow side during mechanical reduction process. Chamfer structures of as-cast slabs can reduce the bulging deformation, and the big-chamfer slab can simultaneously decrease the bulging deformation located at the center and corner area of slab narrow side. The results indicate that optimization of chamfer angle and chamfer length can decrease the bulging deformation of the slab narrow side, but the bulging deformation of the slab narrow side cannot be effectively controlled by optimization of secondary cooling schemes.