Grain Oriented Electromagnetic Steel Sheet And Method For

Grain Oriented Electromagnetic Steel Sheet And Method For Manufacturing Same

Abstract: The purpose of the present invention is to provide a grain-oriented electromagnetic steel sheet in which iron loss is improved and which suppresses a decrease in productivity in magnetic domain control in which a laser groove is formed. A grain-oriented electromagnetic steel sheet according to the present invention has multiple grooves in the surface of the steel sheet, and has protrusions at groove lateral parts adjacent to each of the grooves in the surface of the steel sheet. The crystal orientation of at least one crystal grain existing inside each of the protrusions differs by 5°C or more from the goss orientation which is the crystal orientation of crystal grains at portions excluding vicinities of the protrusions in the steel sheet. As a result, iron loss in the electromagnetic steel sheet is improved and a step for removing the protrusions becomes unnecessary.

Patent Information

Application #

Filing Date

03 April 2025

Publication Number

17/2025

Publication Type

INA

Invention Field

METALLURGY

Status

Email

Parent Application

Applicants

NIPPON STEEL CORPORATION

6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Inventors

1. YASUDA, Masato

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

2. HAMAMURA, Hideyuki

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

3. SUGIYAMA, Kimihiko

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

4. MORISHIGE, Nobusato

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

#	Name	Date
1	202517032999-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [03-04-2025(online)].pdf	2025-04-03
2	202517032999-STATEMENT OF UNDERTAKING (FORM 3) [03-04-2025(online)].pdf	2025-04-03
3	202517032999-REQUEST FOR EXAMINATION (FORM-18) [03-04-2025(online)].pdf	2025-04-03
4	202517032999-PRIORITY DOCUMENTS [03-04-2025(online)].pdf	2025-04-03
5	202517032999-POWER OF AUTHORITY [03-04-2025(online)].pdf	2025-04-03
6	202517032999-FORM 18 [03-04-2025(online)].pdf	2025-04-03
7	202517032999-FORM 1 [03-04-2025(online)].pdf	2025-04-03
8	202517032999-DRAWINGS [03-04-2025(online)].pdf	2025-04-03
9	202517032999-DECLARATION OF INVENTORSHIP (FORM 5) [03-04-2025(online)].pdf	2025-04-03
10	202517032999-COMPLETE SPECIFICATION [03-04-2025(online)].pdf	2025-04-03
11	202517032999-Proof of Right [01-05-2025(online)].pdf	2025-05-01
12	202517032999-MARKED COPIES OF AMENDEMENTS [01-05-2025(online)].pdf	2025-05-01
13	202517032999-FORM 13 [01-05-2025(online)].pdf	2025-05-01
14	202517032999-AMMENDED DOCUMENTS [01-05-2025(online)].pdf	2025-05-01
15	202517032999-FORM 3 [31-07-2025(online)].pdf	2025-07-31