Effects of normalizing, which is necessary for high induction in boron silicon-iron, was studied with a high carbon silicon alloy(0.049%C). Normalizing temperatures ranged from 600℃ to 1100℃. The samples normalized below 1000℃ underwent complete secondary recrystallization, the sample normalized at 1050℃ consisted of the mixture of coarsened primary grains and secondary recrystallized grains, and the sample normalized at 1100℃ experienced only normal grain growth. Elongated grains were observed in primary recrystallized microstructure in the sample normalized above 1000℃. Heating the sample, which was normalized at 1100℃, at 900℃ the elongated grains completely eliminated and secondary recrystallization occurred. in $N_2$, the elongated grains completely eliminated and secondary recrystallization occurred.
Additionally, a sample containing 0.013%C was selected to investigate the effect of normalizing in low carbon boron silicon iron. it was known that the presence of austenite during hot rolling is essential for secondary recrystallization in boron silicon iron. In present investigation, even though low carbon boron silicon iron alloy containing 0.013%C does not form austenite during soaking for hot rolling, secondary recrystallization occurred if the normalizing time was prolonged.
The normal grain growth inhibition was eliminated when high carbon boron silicon alloy (0.049%C) was normalized at 1100℃. It is proposed that the particles in hot band were affected by normalizing and the changes of particles influenced the grain growth behavior during final texture anneal.
