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Grain Oriented Electromagnetic Steel Sheet And Method For Forming Insulating Film

Abstract: This grain-oriented electromagnetic steel sheet comprises a base steel sheet and an insulating film that is formed on the surface of the base steel sheet; the insulating film comprises an intermediate layer that is formed on the base steel sheet side, while containing a crystalline metal phosphate salt, and a tension coating layer that is formed on the surface side of the insulating film; the intermediate layer has an average thickness of 0.3 to 10.0 µm; the insulating film has an average thickness of 2.0 to 10.0 µm; the crystalline metal phosphate salt in the intermediate layer is composed of one or more substances selected from among zinc phosphate, manganese phosphate, iron phosphate and zinc calcium phosphate; the tension coating layer contains a metal phosphate salt and silica; and the content of the silica in the tension coating layer is from 20 to 60% by mass.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
26 September 2023
Publication Number
38/2024
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 202317064532-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [26-09-2023(online)].pdf 2023-09-26
2 202317064532-STATEMENT OF UNDERTAKING (FORM 3) [26-09-2023(online)].pdf 2023-09-26
3 202317064532-PROOF OF RIGHT [26-09-2023(online)].pdf 2023-09-26
4 202317064532-PRIORITY DOCUMENTS [26-09-2023(online)].pdf 2023-09-26
5 202317064532-POWER OF AUTHORITY [26-09-2023(online)].pdf 2023-09-26
6 202317064532-FORM 1 [26-09-2023(online)].pdf 2023-09-26
7 202317064532-DRAWINGS [26-09-2023(online)].pdf 2023-09-26
8 202317064532-DECLARATION OF INVENTORSHIP (FORM 5) [26-09-2023(online)].pdf 2023-09-26
9 202317064532-COMPLETE SPECIFICATION [26-09-2023(online)].pdf 2023-09-26
10 202317064532-FORM 18 [06-03-2025(online)].pdf 2025-03-06