Grain Oriented Electromagnetic Steel Sheet And Method For Forming

Grain Oriented Electromagnetic Steel Sheet And Method For Forming Insulating Coating Film

Abstract: This grain-oriented electromagnetic steel sheet has a base material steel sheet and an insulating coating film formed on the surface of the base material steel sheet, wherein: the base material steel sheet has a flat section and a groove section extending in the direction of 45-135° with respect to the rolling direction; the depth of the groove section is 10-30 µm; the width of the groove section is 10-200 µm; the insulating coating film has an intermediate layer that is formed on the base material steel sheet side, has a thickness of 0.1-15.0 µm, and contains a crystalline phosphate metal salt, and a tension coating layer formed on the surface side of the insulating coating film; and the base material steel sheet is covered with the insulating coating film having the intermediate layer and the tension coating layer at an area ratio of 60% or more of the groove section.

Patent Information

Application #

Filing Date

13 October 2025

Publication Number

47/2025

Publication Type

INA

Invention Field

CHEMICAL

Status

Email

Parent Application

Applicants

NIPPON STEEL CORPORATION

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

Inventors

1. TAKEDA Kazutoshi

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

2. TAKATANI Shinsuke

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

3. KATAOKA Takashi

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

4. KOGAKURA Yuuki

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

Specification

Documents

Application Documents

#	Name	Date
1	202517098580-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [13-10-2025(online)].pdf	2025-10-13
2	202517098580-STATEMENT OF UNDERTAKING (FORM 3) [13-10-2025(online)].pdf	2025-10-13
3	202517098580-REQUEST FOR EXAMINATION (FORM-18) [13-10-2025(online)].pdf	2025-10-13
4	202517098580-PROOF OF RIGHT [13-10-2025(online)].pdf	2025-10-13
5	202517098580-PRIORITY DOCUMENTS [13-10-2025(online)].pdf	2025-10-13
6	202517098580-POWER OF AUTHORITY [13-10-2025(online)].pdf	2025-10-13
7	202517098580-FORM 18 [13-10-2025(online)].pdf	2025-10-13
8	202517098580-FORM 1 [13-10-2025(online)].pdf	2025-10-13
9	202517098580-DRAWINGS [13-10-2025(online)].pdf	2025-10-13
10	202517098580-DECLARATION OF INVENTORSHIP (FORM 5) [13-10-2025(online)].pdf	2025-10-13
11	202517098580-COMPLETE SPECIFICATION [13-10-2025(online)].pdf	2025-10-13