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Title:
METHOD FOR PRODUCING HOT-ROLLED STEEL SHEET, METHOD FOR PREDICTING TEMPERATURE HISTORY OF HOT-ROLLED STEEL SHEET, AND METHOD FOR PREDICTING HARDENED SECTION OF HOT-ROLLED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/201565
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for producing a hot-rolled steel sheet in which it is possible to predict the temperature history of unevenness in the end faces of a coil. A method for producing a hot-rolled steel sheet according to an embodiment of the present invention comprises: a step in which the surface temperature of a band-shaped steel material obtained by hot rolling is measured; a step in which the temperature history in a cooling state after winding when it is assumed that the band-shaped steel material is wound into a coil shape with no unevenness in the end faces thereof is calculated on the basis of the surface temperature measured in the measurement step; a step in which the band-shaped steel material is actually wound into a coil shape after the measurement step; a step in which the end faces of the coil wound in the winding step are scanned with a displacement gauge and the magnitude of unevenness in the end faces is derived across the radius of the coil; and a step in which the temperature history of the unevenness while in the cooling state is predicted using the temperature history calculated in the calculation step and the magnitude of the unevenness derived in the derivation step.

Inventors:
FUKUSHIMA KOKI
SANO YUTA
KOBAYASHI MASANORI
KITAGAWA TOMA
MURAKAMI TOSHIO
OHARA TAKAHIRO
INUI MASAHIRO
IIJIMA TAKESHI
TERAOKA TAKASHI
YONEDA TAKUMA
ODO KOHEI
HARADA SHUN
Application Number:
PCT/JP2021/022717
Publication Date:
September 29, 2022
Filing Date:
June 15, 2021
Export Citation:
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Assignee:
KOBE STEEL LTD (JP)
International Classes:
B21C47/02; B21B37/74; B21B38/00; B21B45/02; B21C47/26; B21C51/00
Foreign References:
JP2010112958A2010-05-20
JP2005281809A2005-10-13
JPH11244939A1999-09-14
KR101482348B12015-01-13
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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