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In a previous work, the processing temperatures applied in the hot strip mill rolling process, LTQ, of CSN were investigated for some classes of steelsmicroalloyed to Niobium. The results of this work showed the possibility of reduction of the reheating temperature used for these steels, reflecting in productivity improvements. In the current work, the impact of these changes on the microstructure obtained fromthe LTQprocess was investigated in more depth, using a software developed to predict the evolution of the microstructure in terms of the recrystallized fractions, the grain size distributions and the behavior of the mean flow stresses, TME.

INVESTIGAÇÃO COMPUTACIONAL DO IMPACTO DOS PARÂMETROS TERMOMECÂNICOS NA MICROESTRUTURA DE UM AÇO MICROLIGADO AO NIÓBIO DURANTE A LTQ