Patent ID: 11923115
Assignee: JFE STEEL CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC B  C  H

Claim 6:
7. A method for manufacturing an insulating coating-attached electrical steel sheet comprising the steel sheet, and on at least one surface of the steel sheet, an insulating coating including an insulating tensile coating layer A; wherein:
a tension applied to the steel sheet by an insulating tensile coating layer having a coating weight of M/2 from a surface of the insulating tensile coating layer A is 0.80×σA or more, where M is a weight of the insulating tensile coating layer A, and σA is a tension applied to the steel sheet by the insulating tensile coating layer A; the method comprising:
forming the insulating tensile coating layer A by applying a treatment solution for coating formation containing colloidal silica, at least one selected from Mg, Al, Ca, Ba, Sr, Zn, Cr, and Mn salts of phosphoric acid, and a compound containing at least one selected from Ti, Nd, Mo, B, Ta, and Cu to at least either surface of the electrical steel sheet, subsequently
heating the coated electrical steel sheet at a heating rate of 100° C./s or more in a temperature range of 600° C. or higher and 700° C. or lower, and then
baking the heated electrical steel sheet at 800° C. or higher.