To provide a method for manufacturing a non-oriented electromagnetic steel sheet drastically improved in magnetic flux density in the rolling direction.
A steel slab having a composition containing, by mass, 0.0050-0.03% C, 2-7% Si, 0.05-3% Mn, ≤0.01% Al, 0.003-0.05% V, ≤0.0050% S, ≤0.0050% N and the balance Fe with inevitable impurities, is hot-rolled, and after annealing to the hot-rolled plate, the rolling-reduction ratio in the finish cold-rolling at one time or two or more times interposing an intermediate annealing, is respectively set to 50-75% to have the last sheet thickness. Thereafter, decarburization-annealing is performed after finish-annealing, so that the content of C is <0.005 mass%, or after the decarburization-annealing is performed so that the content of C is <0.005 mass%, the finish-annealing is performed.
ODA YOSHIHIKO
KONO MASAAKI
| JPH0320413A | 1991-01-29 | |||
| JPH02274845A | 1990-11-09 | |||
| JP2005187846A | 2005-07-14 | |||
| JP2009203520A | 2009-09-10 | |||
| JP2004027278A | 2004-01-29 | |||
| JPH0320413A | 1991-01-29 | |||
| JPH02274845A | 1990-11-09 | |||
| JP2005187846A | 2005-07-14 |
Morio Nakamura
Shiro Fujitani