Title:
METHOD FOR PRODUCING GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET, AND HOT ROLLED SHEET FOR GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2024/043294
Kind Code:
A1
Abstract:
A method for producing a grain-oriented electromagnetic steel sheet, the method preventing a break during cold rolling when a grain-oriented electromagnetic steel sheet is produced by subjecting a steel slab, which contains, in mass%, 0.03% to 0.08% of C, 2.0% to 5.0% of Si, 0.005% to 1.0% of Mn, less than 0.010% of Al, 0.006% or less of N and 0.0060% or less of O, while containing S and Se within the range where (S + 0.405 × Se) is 0.0015% to 0.0060%, to hot rolling, hot rolled sheet annealing, cold rolling, decarburization annealing that doubles as primary recrystallization annealing, and subsequent finish annealing, by performing at least two consecutive passes of rolling within the temperature range of 1050°C to 1150°C during the hot rolling, and setting the inter-pass time between the two passes to 60 s or less, the draft of each pass to 20% or more, and the strain rate to 15 s-1 or more; and a hot rolled sheet which is used for this production method.
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Inventors:
SHINGAKI YUKIHIRO (JP)
SHIMOYAMA YUSUKE (JP)
YAMADA KUNI (JP)
SHIMOYAMA YUSUKE (JP)
YAMADA KUNI (JP)
Application Number:
PCT/JP2023/030414
Publication Date:
February 29, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; C22C38/60; H01F1/147
Foreign References:
| JPH05105956A | 1993-04-27 | |||
| JP2002212639A | 2002-07-31 | |||
| JP2003226916A | 2003-08-15 | |||
| JP2014500399A | 2014-01-09 | |||
| US20130174940A1 | 2013-07-11 |
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
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