Patent ID: 7192492

Claim:
Process for the control of inhibitors in the production of grain oriented electrical steel strips, in which a silicon steel is continuously cast, hot-rolled, cold-rolled to obtain a cold-rolled strip which is then subjected to a continuous annealing for primary recrystallization and if necessary for decarburization, and subsequently to a secondary recrystallization annealing at a higher temperature than said primary recrystallization, said process comprising the following steps: slab heating in a furnace in a plurality of steps at different temperatures before hot rolling, the treating temperature during the last step, prior to exiting the furnace being lower than the maximum temperature reached in the furnace in at least one of the previous heating steps; cold-rolling in one or more reduction steps, separated by intermediate annealing, in which in at least one of said steps a reduction greater than 75% is carried out; and continuous primary recrystallization annealing of the cold-rolled strip, at a temperature comprised between 800 and 950° C.