| 摘要 |
According to the present invention, a method for manufacturing the oriented electrical steel plate comprises a step of: 1) reheating a slab consisting of 2.0 ~4.5 wt% of Si; 0.005 ~ 0.040 wt% of Al; less than 0.20 wt% of Mn; less than 0.010 wt% of N; less than 0.010 wt% of S; 0.005 ~ 0,05 wt% of P; 0.04 ~ 0.07 wt% of C; 0.08 ~ 0.10 wt% of Sn, residual Fe and other impurities; 2) hot-rolling the slab for dynamic recrystallization; 3) strongly cold-rolling the hot-rolled steel plate; 4) first annealing and recrystallizing the cold-rolled steel plate; and 5) finally annealing the first recrystallized and annealed steel plate. A strain amount in hot-rolling is between 0.3 and 1.9, and a strain rate is between 5 and 100 per second. |
