Title:
METHOD FOR PRODUCING GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2020/149347
Kind Code:
A1
Abstract:
A method for producing a grain-oriented electromagnetic steel sheet according to the present invention comprises a step of obtaining a hot-rolled sheet by subjecting a slab to hot rolling; a step of obtaining an annealed hot-rolled sheet by subjecting the hot-rolled sheet to hot-rolled sheet annealing; a step of obtaining a cold-rolled sheet by subjecting the annealed hot-rolled sheet to cold rolling; a step of obtaining a decarburized annealed sheet by subjecting the cold-rolled sheet to decarburization annealing; a step of coating the decarburized annealed sheet with an annealing separation agent for which alumina is a main component; and a step of subjecting the decarburized annealed sheet coated with the annealing separation agent to finish annealing. The annealing separation agent contains 28 to 50 mass% MgO, and the coating amount with the annealing separation agent is 6.0 to 14.0 g/m2 per one side of the decarburized annealed sheet.
Inventors:
TAKATANI SHINSUKE (JP)
OKUMURA SHUNSUKE (JP)
NAGANO SHOHJI (JP)
OKUMURA SHUNSUKE (JP)
NAGANO SHOHJI (JP)
Application Number:
PCT/JP2020/001193
Publication Date:
July 23, 2020
Filing Date:
January 16, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C22/00; C21D8/12; C22C38/00; C22C38/60
Domestic Patent References:
| WO2002088403A1 | 2002-11-07 | |||
| WO2002088403A1 | 2002-11-07 |
Foreign References:
| JPH083648A | 1996-01-09 | |||
| JPH06256848A | 1994-09-13 | |||
| JP2000038615A | 2000-02-08 | |||
| JPH05263135A | 1993-10-12 | |||
| JP2019005083A | 2019-01-17 | |||
| JPS4839338A | 1973-06-09 | |||
| JPH07278670A | 1995-10-24 | |||
| JPH11106827A | 1999-04-20 | |||
| JPH07118750A | 1995-05-09 | |||
| JP2003268450A | 2003-09-25 |
Other References:
See also references of EP 3913108A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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