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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11326221 B1

PDFFull Text
Date of Patent:
May. 10, 2022

Filed:

Dec. 13, 2017

Grain-oriented electrical steel sheet and manufacturing method therefor

Applicant:

Posco, Pohang-si, KR;

Inventors:

Dae Hyun Song, Pohang-si, KR;

Seung Il Kim, Pohang-si, KR;

June Soo Park, Pohang-si, KR;

Il Nam Yang, Pohang-si, KR;

Assignee:

POSCO, Pohang-Si, KR;

Attorney:

Morgan, Lewis & Bockius LLP

Primary Examiner:

Weiping Zhu

Int. Cl.
CPC ...
C21D 9/46 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/34 (2006.01); C22C 38/40 (2006.01); H01F 1/147 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/005 (2013.01); C21D 8/1272 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/008 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/34 (2013.01); C22C 38/40 (2013.01); H01F 1/14775 (2013.01);
Abstract

According to an exemplary embodiment of the present invention, a manufacturing method of a grain-oriented electrical steel sheet, includes: preparing a slab; heating the slab; forming a hot-rolled sheet by hot-rolling the slab; performing hot-rolled sheet annealing on the hot-rolled sheet; forming a cold-rolled sheet by cold-rolling the hot-rolled sheet that has been completely subjected to the hot-rolled sheet annealing; performing first recrystallization annealing on the cold-rolled sheet; and performing second recrystallization annealing on the cold-rolled sheet that has been completely subjected to the first recrystallization annealing, wherein the hot-rolled sheet undergoes a first heating step, a second heating step, and a soaking step, and a temperature rise rate tof the first heating step and a temperature rise rate tof the second heating step satisfy Formula 1.5×  [Formula 1]

Find Patent Forward Citations

Song, Dae. (2022). Grain-oriented electrical steel sheet and manufacturing method therefor (U.S. Patent No. 11326221). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11326221

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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