EP 3187275 B1 20191218 - THICK STEEL PLATE MANUFACTURING METHOD
Title (en)
THICK STEEL PLATE MANUFACTURING METHOD
Title (de)
HERSTELLUNGSVERFAHREN FÜR DICKE STAHLPLATTE
Title (fr)
PROCÉDÉ DE FABRICATION DE PLAQUE D'ACIER ÉPAISSE
Publication
Application
Priority
- JP 2014171046 A 20140826
- JP 2015004056 W 20150814
Abstract (en)
[origin: EP3187275A1] It is an object to provide a method for manufacturing a steel plate that provides a high-quality steel plate having less variation in quality. A method for manufacturing a steel plate, which performs a hot rolling step, a hot correction step, and an accelerated cooling step in this order, the method further including a descaling step in which jetting of descaling water is performed two times between the hot correction step and the accelerated cooling step, wherein, in the descaling step, energy density of the descaling water that is jetted to a surface of the steel plate is greater than or equal to 0.07 J/mm 2 in total for the jetting performed two times, second-descaling water is jetted after 0.5 s or more after jetting first-descaling water, and a surface temperature of the steel plate just before the second-descaling water is jetted is lower than or equal to a Ar 3 transformation point.
IPC 8 full level
B21B 1/38 (2006.01); B21B 45/02 (2006.01); B21B 45/06 (2006.01); B21B 45/08 (2006.01)
CPC (source: EP KR)
B21B 1/38 (2013.01 - EP KR); B21B 37/74 (2013.01 - KR); B21B 45/02 (2013.01 - EP); B21B 45/06 (2013.01 - EP KR); B21B 45/08 (2013.01 - EP KR); B21B 2261/20 (2013.01 - KR)
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
DOCDB simple family (publication)
EP 3187275 A1 20170705; EP 3187275 A4 20170906; EP 3187275 B1 20191218; BR 112017004022 A2 20171205; BR 112017004022 B1 20220802; CN 106604785 A 20170426; CN 106604785 B 20190111; JP 6108041 B2 20170405; JP WO2016031169 A1 20170427; KR 101940429 B1 20190118; KR 20170033423 A 20170324; WO 2016031169 A1 20160303
DOCDB simple family (application)
EP 15836450 A 20150814; BR 112017004022 A 20150814; CN 201580045918 A 20150814; JP 2015004056 W 20150814; JP 2016544933 A 20150814; KR 20177005018 A 20150814