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Title:
CONTINUOUS CAST SLAB
Document Type and Number:
WIPO Patent Application WO/2023/218784
Kind Code:
A1
Abstract:
Provided is a continuous cast slab that, even if the slab is highly alloyed and has low ductility, is configured not to cause slab fracture during cooling of the slab. The continuous cast slab for high-strength steel that, at a 10 mm position from the surface of the continuous cast slab, has an average former austenite grain size of 100 μm-0.5 mm, and has a micro structure in which, in terms of area ratio, ferrite is at least 10%, pearlite is at least 10%, and bainite is 1-30%. Preferably, the continuous cast slab contains, in terms of mass%, 0.10 to 0.40% of C, 0.10 to 2.50% of Si and 1.00 to 5.00% of Mn.

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Inventors:
KAWASAKI TAIKI (JP)
ODAGAKI TOMOYA (JP)
TSUZUMI KENJI (JP)
YAMAZAKI KAZUHIKO (JP)
Application Number:
PCT/JP2023/012738
Publication Date:
November 16, 2023
Filing Date:
March 29, 2023
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; C22C38/04; C21D1/00; C21D9/00; C22C38/60
Foreign References:
JP2007181861A2007-07-19
JP2019167560A2019-10-03
JP2019167559A2019-10-03
JP2020139210A2020-09-03
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
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