LOW-IRON-LOSS GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET ANDMETHOD OF PRODUCING THE SAME

摘要

A low-iron-loss grain-oriented electromagnetic steel sheet is provided with the multiplicity of linear grooves formed in a surface thereof to extend in a direction substantially perpendicular to the direction of rolling of the steel sheet at a predetermined pitch in the direction of rolling, and a multiplicity of linear high dislocation density regions introduced to extend in a direction substantially perpendicular to the direction of rolling of the steel sheet at a predetermined pitch in the direction of rolling. The pitches 11 and 12 of the linear grooves and the high dislocation density regions, respectively, satisfy-equations (1) and (2): 1 ? 11 ? 30 (mm) ........(1) 5 ? ? x 12 ? 100 ........(2).