ABSTRACT
Prior to the start of hot rolling, the steel microstructure consists of coarse equiaxed grains of austenite as shown in Fig. 12.1. When passed through the rolls, the austenite grains are flattened and elongated on average, while each austenite grain undergoes a dimensional change that corresponds to that of the workpiece as a whole [1]. Figure 12.1 also shows that deformation bands can also be induced within the grains [2].
