The invention relates to a production method for oriented
silicon steel, in particular to a production method for
copper-contained low-temperature high-magnetic-induction-oriented
silicon steel. According to the production method, the content of Als and the content of N in
raw material components are increased, AlN serves as a main inhibitor, due to the fact that the content of the Als and the content of the N are increased, on the one hand, the quantity of the inhibitor is increased and the inhibition force is enhanced, and on the other hand, the secondary recrystallization temperature is increased and the stability of secondary recrystallization is improved; Sn is added to the
raw material components, so that the inhibition force is further enhanced, and due to the fact that the
grain boundary co-segregation element Sn is added to the components, the content of the Sn is controlled between 0.04% to 0.06%, and through
grain boundary co-segregation of the Sn, other grains provided with the size
advantage and deviating from the Gausian orientation can be effectively prevented from growing abnormally, the
grain orientation degree obtained after secondary recrystallization is improved, and magnetic induction is improved; a high-temperature annealing process is adjusted, the rate of N2 to H2 of the
atmosphere in the temperature increase stage is adjusted to 1 to 1 from 1 to 3, and due to the fact that a great amount of the AlN is formed in the low-temperature temperature increase stage, the proportion of the N2 is increased, generation of the AlN is promoted, the AlN is prevented from being decomposed too early, and the phenomenon that a
tail iron loss curve fluctuates due to the increase of the content of the Als in
continuous production is avoided.