Hot Deformation and Recrystallization of 3% Silicon Steel: Part 4: Effect of Recovery and Partial Recrystallization between Passes on Subsequent Recrystallization Behaviour

Two pass hot rolling experiments have been carried out on 3% Si steel rolled to total strains in the range 0.25 to 1.1 at temperatures of 850 to 1100°C. Retardation of recrystallization after the second pass compared with after a single pass to the same total strain arises mainly from differences in the strain path history when only recovery takes place between passes. When partial interpass recrystallization occurs, rolling load in the second pass, recrystallization kinetics after the second pass and recrystallized grain size all follow laws of mixtures between the values for zero and full interpass recrystallization.