Oriented Electromagnetic Steel Sheet And Method For Producing Same

Abstract: The purpose of the present invention is to provide an oriented electromagnetic steel sheet with which iron loss is further improved during magnetic domain control for forming a laser groove in a cold rolling steel sheet. The present invention is an oriented electromagnetic steel sheet satisfying the following requirements for achieving the above purpose. That is, this oriented electromagnetic steel sheet comprises: a base material steel sheet having a plurality of grooves on a surface of a steel sheet; and a glass coating film on a surface of the base material steel sheet. The oriented electromagnetic steel sheet is characterized in that the absolute value of the angle ? formed between the longitudinal direction of the grooves and a direction perpendicular to the rolling direction of the base material steel sheet as well as to the sheet thickness direction is 0-40°, the width W of the grooves is 20-300 µm, the depth D of the grooves is 10-40 µm, the interval P of the grooves in the rolling direction is 1-30 mm, and, inside the glass coating film immediately below the recessed surface of the grooves, one or more fine particles with a long axis of 1-20 µm are present on the cross-section perpendicular to the longitudinal direction of the grooves.

Patent Information

Applicants

Inventors

Specification

Documents

Application Documents