An alternative way for evaluating the deformation of MnS inclusions in hot rolling of steel

The behavior of MnS inclusions during flat hot rolling of steel has been studied. Experiments were carried out in a four-high mill. The workpiece was up to a nominal reduction in height of 85% in four passes, at rolling temperatures of 700-1200degreesC with interpass reheating. The relative plasticity and orientation of inclusions were quantitatively assessed by means of an image-processing tool. Finite element analyses were performed in order to scrutinize the concept of 'relative plasticity', which is based on dimensional change of the inclusion, Furthermore, inclusion reorientation is discussed.