| 摘要 |
A production method for an oriented electromagnetic steel plate, whereby a steel slab containing, in mass%, 0.001%-0.10% C, 1.0%-5.0% Si, 0.01%-0.5% Mn, 0.005-0.040% S and/or Se, 0.003-0.050% sol. Al, and 0.0010-0.020% N is: hot rolled; processed to a final plate thickness by cold rolling once or cold rolling at least twice with intermediate annealing in between; subjected to primary recrystallization annealing; then coated with an annealing separation agent and finish-annealed. An oriented electromagnetic steel plate having miniaturized secondary recrystallization particles and stabilized low iron loss can be obtained as a result of rapid heating at an average temperature increase speed of 40-200°C/s, between 550-700°C during the heating process in the primary recrystallization annealing and by maintaining a temperature increase speed of no more than 10°C/s for 1-10 s during any one temperature zone between 250-550°C. |
