Abstract
This paper describes a local internal crack resulting from three-dimensional slab deformation of a solidifying shell at the central bearing during high-speed continuous casting. This internal crack is not explained by the present bulging model, as we constructed a new model in which three-dimensional slab deformations at the central bearing result from the coefficient of slab bulging and the coefficient of bulging strain using the finite-element method, and calculate a two-dimensional beam model taking into consideration the elastic, plastic and creep deformations. Compared with calculations and measurements of slab bulging that were made by our experiments, we found that this model could be used to analyze three-dimensional slab bulging and to design a high-speed casting machine.
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