| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an electromagnetic steel sheet by using a primary recrystallization phenomenon, which has good magnetic properties in the rolling direction and surface texture, and does not have magnetic aging, in order to improve efficiency for a rotary apparatus.SOLUTION: A steel slab comprising 0.0030% or less of C, 2.0-3.5% of Si, 0.20-2.5% of Al, 0.10-1.0% of Mn, and 0.03-0.10% of Sn, wherein Si+Al+Sn≤4.5%, is subjected to hot rolling, and then primary cold rolling with a rolling rate of 60-70% to produce a steel sheet with a middle thickness. Then, the steel sheet is subjected to process annealing, then secondary cold rolling with a rolling rate of 55-70%, and further final annealing at 950°C or more for 20-90 seconds. Thus, the non-oriented electromagnetic steel sheet having good properties in the rolling direction and good surface texture is produced. |
