Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/121040
Kind Code:
A1
Abstract:
A method for manufacturing a grain-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: hot rolling a slab so as to manufacture a hot rolled sheet, the slab comprising, by wt%, 2.5-4.0% of Si, 0.03-0.09% of C, 0.015-0.040% of Al, 0.04-0.15% of Mn, 0.01% or less of S (excluding 0%), 0.002-0.012% of N, 0.01-0.05% of Sb, 0.03-0.1% of Sn, 0.05-0.2% of Cr and the balance of Fe and inevitable impurities; cold rolling the hot rolled sheet so as to manufacture a cold rolled sheet; performing primary recrystallization annealing on the cold rolled sheet; and performing secondary recrystallization annealing on the steel sheet having undergone primary recrystallization annealing.
More Like This:
Inventors:
KO KYUNGJUN (KR)
LEE SANGWOO (KR)
LEE SANGWOO (KR)
Application Number:
PCT/KR2022/019322
Publication Date:
June 29, 2023
Filing Date:
December 01, 2022
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C22C38/38; C21D8/12; C22C38/00; C22C38/06; H01F1/147
Foreign References:
| KR20200035752A | 2020-04-06 | |||
| JPH07258741A | 1995-10-09 | |||
| JP2014156619A | 2014-08-28 | |||
| KR20180069433A | 2018-06-25 | |||
| KR20210024614A | 2021-03-05 |
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
Download PDF: