| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a non-oriented magnetic steel sheet excellent in magnetic properties in both the rolling direction ( L-direction ) and the direction ( C-direction ) vertical to the rolling direction by improving magnetic flux density in the C-direction without lowering the magnetic flux density in the L-direction. <P>SOLUTION: By this manufacturing method, when performing cold rolling of a slab which contains, by mass, ≤ 0.05% C, ≤ 7% Si and ≤ 7% Al through hot rolling and pickling, at least one or more passes of different circumferential speed rolling in which the circumferential speed ratio between upper and lower work rolls is ≥ 10% are performed. It is preferable to perform this different circumferential speed rolling in warm of 300-600°C. In the case the annealing of a hot sheet is performed between the hot rolling and the pickling, the annealing temperature is taken as 900-1,150°C. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
