PRODUCTION METHOD FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET

WIPO Patent Application WO/2021/261517

A1

[Problem] To provide a novel and improved production method that is for a grain-oriented electrical steel sheet and that enables production of a grain-oriented electrical steel sheet having a high magnetic flux density and excellent magnetic characteristics. [Solution] An embodiment of the present invention provides a production method that is for a grain-oriented electrical steel sheet, and that is characterized by comprising a hot rolling step, a cold rolling step, a primary recrystallization-annealing step, a finishing-annealing step, and a planarization-annealing step, and is characterized in that a shot blast process and/or a leveler process and a solution contact process are performed, the solution contains a predetermined amount of Cu or the like, the pH of the solution is at least -1.5 but less than 7, the temperature of the solution is 15-100°C, and the time during which the steel sheet is immersed in the solution is 5-200 seconds.

MORISHIGE NOBUSATO (JP)
MIZUKAMI KAZUMI (JP)
YAMAGATA RYUTARO (JP)
KATAOKA TAKASHI (JP)
ATSUMI HARUHIKO (JP)
ITABASHI DAISUKE (JP)
TAKAOBUSHI JUNICHI (JP)

PCT/JP2021/023783

December 30, 2021

June 23, 2021

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NIPPON STEEL CORP (JP)

C21D8/12; C21D9/46; H01F1/147; C22C38/00; C22C38/60

JP2014196559A	2014-10-16
JP2020059050A	2020-04-16
JP2018168426A	2018-11-01
JPS56130475A	1981-10-13
US20120018049A1	2012-01-26
JPH0415644B2	1992-03-18
JPS5113469B2	1976-04-28
JP2019099827A	2019-06-24
JP2003193141A	2003-07-09
JP2014196559A	2014-10-16
JP2016156068A	2016-09-01
JPH06212274A	1994-08-02
JPH07268567A	1995-10-17

AOKI, Atsushi et al. (JP)

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