Global Patent Index - EP 4170054 A4

EP 4170054 A4 20230621 - CONTINUOUS CASTING METHOD

Title (en)

CONTINUOUS CASTING METHOD

Title (de)

STRANGGIESSVERFAHREN

Title (fr)

PROCÉDÉ DE COULÉE CONTINUE

Publication

EP 4170054 A4 20230621 (EN)

Application

EP 21824759 A 20210601

Priority

  • JP 2020105178 A 20200618
  • JP 2021020838 W 20210601

Abstract (en)

[origin: EP4170054A1] A continuous casting method that manufactures a slab that is of high quality, particularly free of corner cracks, by reliably mitigating surface cracks of a cast slab is proposed. In this continuous casting method for steel, a mold having a chamfered shape meeting 0.09 ≤ C/L ≤ 0.20 (where C is an amount (mm) of chamfering at a corner, and L is a length (mm) of a short side of a cast slab) at each corner portion of the mold is used, and an average flow rate of secondary cooling water sprayed onto corner portions of the cast slab in a section from immediately below the mold to lower straightening part is set to 20 to 60 L/(min·m<sup>2</sup>). In particular, it is preferable that the steel has an element composition including, in mass%, C: 0.05 to 0.25% and Mn: 1.0 to 4.0%, and further optionally one or more elements selected from Nb: 0.01 to 0.1%, V: 0.01 to 0.1%, and Mo: 0.01 to 0.1%.

IPC 8 full level

B22D 11/04 (2006.01); B22D 11/22 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01)

CPC (source: EP KR)

B22D 11/04 (2013.01 - KR); B22D 11/0406 (2013.01 - EP); B22D 11/124 (2013.01 - KR); B22D 11/225 (2013.01 - EP); C22C 38/04 (2013.01 - EP KR); C22C 38/12 (2013.01 - EP KR)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

EP 4170054 A1 20230426; EP 4170054 A4 20230621; CN 115697587 A 20230203; JP 6954514 B1 20211027; JP WO2021256243 A1 20211223; KR 20230006903 A 20230111

DOCDB simple family (application)

EP 21824759 A 20210601; CN 202180040196 A 20210601; JP 2021545426 A 20210601; KR 20227042643 A 20210601