| 摘要 |
PURPOSE:To produce a nonoriented electric steel plate having superior magnetic characteristics. CONSTITUTION:Steel contg. limited amts. or less of C, Mn, S, Al, N, O and H besides 0.1-4.0% Si is heated to 950-1,150 deg.C, rolled in >=0.6 rolling shape ratio at >=800 deg.C and further rolled at >35-70% draft at <=800 deg.C. The resulting plate is subjected to dehydrogenation heat treatment, annealing or normalizing in accordance with the thickness to obtain a nonoriented electric steel having superior magnetic characteristics. This plate has high magnetic characteristics in a medium magnetic field and high resistivity. |
