| 摘要 |
PURPOSE:To obtain the directional electromagnetic steels plate of very low iron loss by a method wherein a magnetic domain is fractionized by allowing a proper substance to penetrate. CONSTITUTION:When a penetrating substance (an alloy layer, a diffusion layer, a surface reaction produce obtained by the reaction with a steel plate and a surface film, for example) having the width of 5mm or less which is different from the steel component or the steel construction of a directional electromagnetic steel plate, enters an annealing-finished directional electromagnetic steel plate leaving an interval of 1mm or more, the magnetic domain of the steel plate is fractionized. The iron loss is very small, and the directional electromagnetic steel plate whereon the iron loss improvement effect by the fractionization of magnetic domain does not vanish even when the heat treatment such as a distortion-removing annealing and the like is performed. |
