Method and apparatus for manufacturing a high-oriented electrical steel sheets of the magnetic properties

Oriented electrical steel sheet moving at the speed Vl in the rolling direction, in a laser beam with elliptical spot plate width direction by scanning irradiation with Vc to improve the core loss oriented electrical steel sheet technique, the scanning direction of the elliptical beam and the angle formed by [theta] s of the major axis of the ellipse, as well as adjusted based on