PRODUCTION METHOD FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND GRAIN-ORIENTED ELECTRICAL STEEL SHEET

WIPO Patent Application WO/2019/181952

A1

A production method for a grain-oriented electrical steel sheet according to an embodiment of the present invention includes: a step in which a slab that includes a prescribed component composition, with the remainder comprising Fe and impurities, is hot-rolled to obtain a hot-rolled steel sheet; a step in which the hot-rolled sheet is annealed, as needed, to obtain a hot-rolled annealed sheet; a step in which acid pickling is performed to obtain an acid-pickled sheet; a step in which cold rolling is performed to obtain a cold-rolled steel sheet; a step in which primary recrystallization annealing is performed; a step in which, after a separating agent for annealing that contains MgO is applied to the surface of the sheet, final annealing is applied thereto to obtain a final annealing sheet; and a step in which, after applying an insulating coating, planarization annealing of the sheet is performed.

MORISHIGE NOBUSATO (JP)
KATAOKA TAKASHI (JP)
ATSUMI HARUHIKO (JP)
MAYUMI YASUHIRO (JP)
TAKECHI TOSHIYA (JP)
MASUMITSU NAOTO (JP)
SUENAGA TOMOYA (JP)
KUBOTA MASAMITSU (JP)
HAMAMURA HIDEYUKI (JP)
FUKUTANI KAZUHIKO (JP)

PCT/JP2019/011489

September 26, 2019

March 19, 2019

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NIPPON STEEL CORP (JP)

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

WO2013175733A1	2013-11-28
WO2014049770A1	2014-04-03

JP2000045052A	2000-02-15
JPH10152724A	1998-06-09
JPH01290716A	1989-11-22
JP2017222898A	2017-12-21
JP2014508858A	2014-04-10
JPH11106827A	1999-04-20
JPH08269571A	1996-10-15
JP2018052899A	2018-04-05
JP2014194073A	2014-10-09
JPH07268567A	1995-10-17

See also references of EP 3770282A4

TANAI Sumio et al. (JP)

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