Grain Oriented Electrical Steel Sheet And Method For Forming

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Grain Oriented Electrical Steel Sheet And Method For Forming Insulating Film

Abstract: This grain-oriented electrical steel sheet has a base steel sheet, and an insulating film formed on a surface of the base steel sheet. The insulating film has: an intermediate layer that is formed on the base steel sheet side and that contains a crystalline metal phosphate; and a tensile film layer formed on the surface side of the insulating film. An etch pit structure is formed on the surface of the base steel sheet. The average thickness of the intermediate layer is 0.2-10.0 µm, and the average thickness of the insulating film is 2.0-10.0 µm. The tensile film layer contains a metal phosphate and silica. The contained amount of the silica in the tensile film layer is 20-60 mass%.

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Notices, Deadlines & Correspondence

Patent Information

Application #

Filing Date

27 September 2023

Publication Number

36/2024

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. TAKEDA Kazutoshi

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

2. KATAOKA Takashi

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

3. TAKATANI Shinsuke

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

5. KUNITA Yuki

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

Specification

Documents

Application Documents

#	Name	Date
1	202317064870-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [27-09-2023(online)].pdf	2023-09-27
2	202317064870-STATEMENT OF UNDERTAKING (FORM 3) [27-09-2023(online)].pdf	2023-09-27
3	202317064870-PROOF OF RIGHT [27-09-2023(online)].pdf	2023-09-27
4	202317064870-PRIORITY DOCUMENTS [27-09-2023(online)].pdf	2023-09-27
5	202317064870-POWER OF AUTHORITY [27-09-2023(online)].pdf	2023-09-27
6	202317064870-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [27-09-2023(online)].pdf	2023-09-27
7	202317064870-FORM 1 [27-09-2023(online)].pdf	2023-09-27
8	202317064870-DRAWINGS [27-09-2023(online)].pdf	2023-09-27
9	202317064870-DECLARATION OF INVENTORSHIP (FORM 5) [27-09-2023(online)].pdf	2023-09-27
10	202317064870-COMPLETE SPECIFICATION [27-09-2023(online)].pdf	2023-09-27
11	202317064870-FORM 3 [08-03-2024(online)].pdf	2024-03-08
12	202317064870-FORM 18 [06-03-2025(online)].pdf	2025-03-06