Title:
METHOD FOR PRODUCING STEEL SHEET FOR COLD ROLLING AND METHOD FOR PRODUCING COLD-ROLLED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/234760
Kind Code:
A1
Abstract:
The present invention can provide a method for producing a steel sheet for cold rolling in an intermediate process of production of a high-tensile cold-rolled steel sheet, said method making it possible to prevent an end portion of the steel sheet from cracking during the subsequent cold rolling. The method for producing a steel sheet for cold rolling comprises: hot-rolling a slab having a specific chemical composition so that the outlet temperature of a finishing rolling mill is 800-940°C; cooling at least a part of a steel sheet, obtained by the hot rolling, at a water volume density of not less than 100 L/minute/m2 for not shorter than 0.1 seconds, within 3.0 seconds after at least said part of the steel sheet has passed through the last stand of the finishing rolling mill and has been sent out on a run-out table; and winding up, at a wind-up temperature of not lower than 550°C, the hot-rolled steel sheet that has been cooled.
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Inventors:
KITAGAWA TOMA
MURAKAMI TOSHIO
TERAOKA TAKASHI
YONEDA TAKUMA
HARADA SHUN
NAKAYAMA KEITA
ISHITOBI KATSUMA
KOBAYASHI MASANORI
FUKUSHIMA KOKI
MURAKAMI TOSHIO
TERAOKA TAKASHI
YONEDA TAKUMA
HARADA SHUN
NAKAYAMA KEITA
ISHITOBI KATSUMA
KOBAYASHI MASANORI
FUKUSHIMA KOKI
Application Number:
PCT/JP2022/017334
Publication Date:
November 10, 2022
Filing Date:
April 08, 2022
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C21D9/46; B21B1/22; B21B3/00; B21B45/02; C22C38/00; C22C38/58
Domestic Patent References:
| WO2018055695A1 | 2018-03-29 | |||
| WO2020004561A1 | 2020-01-02 |
Foreign References:
| JP2015147991A | 2015-08-20 | |||
| JP2013032581A | 2013-02-14 | |||
| JP2015063736A | 2015-04-09 |
Attorney, Agent or Firm:
KOTANI, Masataka et al. (JP)
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