| 摘要 |
PROBLEM TO BE SOLVED: To provide a grain oriented silicon steel sheet having high magnetic permeability and also having low iron loss while maintaining high magnetic flux density. SOLUTION: The grain oriented silicon steel sheet has a composition containing 2.0-5.0% Si and 0.0003-0.1%, in total, of one or more elements among As, Sb, and Bi, and further, the mean value of the shifted angle of the crystal orientation [001] of the secondary recrystallized grain from rolling direction is regulated to <=4 deg.. In this case, the area ratio of secondary recrystallized grains of >=60 mm maximum length in a direction perpendicular to rolling direction is regulated to >=85%; the area ratio of crystalline grains of 2-20 mm grain size is regulated to 0.2-10%; and the mean value (area mean value) of the angle formed by the crystal orientation [001] of the crystalline grain of 2-20 mm grain size and the surface of the steel sheet is regulated to 1.5 deg.-5.0 deg.. |
