| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing a directional electromagnetic steel sheet excellent in both core loss and magnetostriction characteristics.SOLUTION: The method includes, when irradiating with a laser a directional electromagnetic steel sheet subjected to forsterite film formation followed by tensile strength coating formation to thereby reduce the core loss of the flat rolled electromagnetic steel sheet and strip, detecting the amount of forsterite film prior to tensile strength coating formation, as well as detecting the amount of tensile strength coating after tensile strength coating formation, collating these amounts of detection with the relation between the amounts of forsterite film and tensile strength coating in which the core loss after laser irradiation is within a target range and the laser irradiation conditions, the relation being evaluated in advance, and irradiating with a laser the directional electromagnetic steel sheet under the irradiation conditions obtained as the result of the collation. |
