9th ECCC European Continuous Casting Conference – ECCC 2017

Based on the numerical simulation and industrial experiment research, the retention characteristics of the ultra-low carbon steel slab corner shape in the hot rolling process and its influence on the edge defects are analyzed. Numerical calculation results show that, the chamfered face changes to be circle arc during hot rolling process. The uniformity of stress distribution is improved. The deformation of corners is more stable. That is benefit for controlling edge seam defect. The industrial test results show that chamfered shape can be maintained to the end of rough rolling with the small width reduction. Corner temperature is higher and uniform in rough rolling process. The chamfered shape is also retained after rough rolling, and that is benefit for stable deformation during finish rolling. Thereby the edge seam defect will be eliminated and the possibility of the occurrence of the defect on surface is reduced radically. The statistical results of industrial rolling show that the edge seam defect is effectively controlled by using chamfered slab.