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The grain size and hot band texture effects on the texture evolution during the semi processed electrical steels were studied in this work. The results show that the increase of the hot band grain size is not efficient to obtain high Goss intensities ({110}<001>) after intermediate annealing, when the hot band texture presents high intensities (around 14 times random) of rotate cube ({100}<011>). The nucleation of Goss and cube grains ({100}<001>) in transition bands of gama fiber grains (<111//DN) was observed. Moreover, the results found in this work suggest that hot band texture is determinant to the texture evolution during the process. Strong influences of hot band grain size in recrystallized grain size after intermediate annealing was found. Samples produced by coarse grains presented high recrystallized grain sizes. The same comportment after temper rolling and final annealing was found, when strain induced boundary migration occurs. Coarse grains after intermediate recrystallization let to high grain sizes after final annealing. Excellent textures for samples produced from directional casting were found, mainly when the sheets were rolled at 800oC.

Controle da textura e da microestrutura durante o processo de fabricação de aços elétricos semiprocessados.