| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a means for producing a magnetic steel sheet excellent in a magnetic characteristic in the direction perpendicular to a rolling direction by utilizing a secondary crystallization phenomenon. <P>SOLUTION: The method for producing the magnetic steel sheet excellent in the magnetic characteristic in the direction perpendicular to the rolling direction is produced so that a slab composed of ≤0.020% C, 2.5-4.0% Si, 0.022-0.035% acid soluble Al, 0.005%≤(S+0.405Se)≤0.014% N, 0.05-0.15% Mn and the valance Fe with inevitable impurities is heated within the temperature range of <1,200°C, is hot-rolled and successively is subjected to a hot-rolled plate annealing and a finish-cold rolling applying 25% to <60% rolling-reduction ratio to be made into a finish sheet thickness, thereafter is subjected to a primary-recrystallizing annealing under wet-hydrogen atmosphere, and is nitrogenized under running strip state, is coated with an annealing separating agent, and is subjected to a finish-annealing so that the secondary recrystallizative phenomenon is utilized. <P>COPYRIGHT: (C)2008,JPO&INPIT |
