The Effect of Initial Void Shape in the Slab on the Void Closure During Plate Rolling

Thick steel plates produced by hot-plate rolling are widely used in the construction of structures such as pressure vessels and buildings. In recent times, there has been a noticeable increase in the size of these structures and a corresponding increase in the demand for products with large plate thicknesses. It is worth noting that as the size of the product increases, the amount of reduction in rolling tends to decrease. So that the voids remain in the slab without closure, the rolling conditions necessary for void closure need to be clarified. Void deformation in the rolling process has been studied, but the through-holes [1, 2] and spherical shapes [3–5] are the objects. It is important to clarify the effect of the void shape, which changes in each rolling pass, on the deformation.