Patent ID: 11225699

Abstract:
A method for producing a non-oriented electrical steel sheet by hot rolling a steel slab having a chemical composition including C: not more than 0.0050 mass %, Si: not more than 4.0 mass %, Mn: 0.03-3.0 mass %, P: not more than 0.1 mass %, Se: not more than 0.0010 mass %, Al: not more than 3.0 mass %, Ni: not more than 3.0 mass %, Cr: not more than 5.0 mass %, Ti: not more than 0.003 mass %, and Nb: not more than 0.003 mass % and subjecting the sheet to hot band annealing if necessary, a cold rolling, and further a finish annealing, wherein the heating in the finish annealing is conducted in two stages of performing induction heating and subsequently a radiation heating and a zone from 600° C. to 740° C. in the induction heating is heated at an average heating rate of not less than 50° C./sec, whereby a high magnetic flux density can be obtained stably.