Title:
PRODUCTION METHOD FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2021/261518
Kind Code:
A1
Abstract:
Provided is a production method for a grain-oriented electrical steel sheet that is thin and has excellent magnetic characteristics. An embodiment of the present invention provides a production method that is for a grain-oriented electrical steel sheet and that comprises: a hot rolling step; an optional hot-rolled sheet-annealing step; an acid-washing step; a cold rolling step; a primary recrystallization-annealing step; a finishing-annealing step; and a planarization-annealing step. In the acid-washing step, an acid-washing solution containing 0.0001-5.00 g/L of Cu is used. The thickness of a cold-rolled steel sheet is 0.15-0.23 mm. The average temperature increase rate in the temperature range of 30-400°C in a temperature increase process in the primary recrystallization step is more than 50°C/sec but not more than 1000°C/sec.
Inventors:
KATAOKA TAKASHI (JP)
ATSUMI HARUHIKO (JP)
YAMAGATA RYUTARO (JP)
MORISHIGE NOBUSATO (JP)
TAKEDA KAZUTOSHI (JP)
ATSUMI HARUHIKO (JP)
YAMAGATA RYUTARO (JP)
MORISHIGE NOBUSATO (JP)
TAKEDA KAZUTOSHI (JP)
Application Number:
PCT/JP2021/023789
Publication Date:
December 30, 2021
Filing Date:
June 23, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/12; C21D9/46; H01F1/147; C22C38/00; C22C38/60
Foreign References:
| JP2020084303A | 2020-06-04 | |||
| JP2018090871A | 2018-06-14 | |||
| JP2018168426A | 2018-11-01 | |||
| JPS56130475A | 1981-10-13 | |||
| US20160108488A1 | 2016-04-21 | |||
| JPH07268567A | 1995-10-17 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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