Influence of Hot Band Normalizing on Recrystallization Behaviour in Grain Oriented Silicon Steels

The influence of normalizing on precipitation, microstructure and texture was investigated to ascertain how these factors play a role in the improvement of magnetic properties. The present work found that normalizing of hot rolled bands led to better magnetic properties. Non‐normalizing resulted in smaller precipitates during primary recrystallization and thus these particles strongly inhibited secondary recrystallization. After normalizing the secondary recrystallized grains were 3.6 times larger than without normalizing. In this case Goss texture volume fractions of secondary recrystallization were higher than without normalizing, showing the same tendency as grain size, and were 45 times higher than after primary recrystallization, whereas in the case of non‐normalizing Goss texture volume fractions in secondary recrystallized grains were only 24 times higher. These results suggest that Goss grain nuclei do not grow properly without grain growth. In conclusion, normalizing for hot bands is a crucial process for securing superior magnetic properties.