Effect of thermal treatment after hot rolling on the microstructure of fe-2.4wt.%si

The grain structure and intensities of the relevant magnetic texture of the hot band affect remarkable the resulting microstructure and texture in the cold rolled and annealed nonoriented electrical steel grades based on ferritic Fe-Si alloys. The coiling or annealing after finishing the hot rolling process is an important factor, which gives rise to different grain structure across the thickness. We describe in this paper the effect of annealing in the temperature range of 750 degrees C up to 850 degrees C by a confocal laser scanning microscopy technology.