Process for producing grain-oriented silicon steel strip

摘要

In a process for the production of a grain-oriented silicon steel strip a slab is heated, hot-rolled, cold-rolled, and subjected to decarburization annealing and secondary recrystallization annealing steps. Grain coarsening is likely to occur during the high temperature heating and to remain in the final product as streaks. The secondary recrystallization is, therefore, incomplete owing to the streaks. In the hot rolling, an asymmetric flow is applied to the steel so as to eliminate the streaks and, hence, to give excellent magnetic properties.