EP 2799584 A4 20150107 - HIGH-STRENGTH THICK STEEL PLATE FOR CONSTRUCTION HAVING EXCELLENT CHARACTERISTICS FOR PREVENTING DIFFUSION OF BRITTLE CRACKS, AND PRODUCTION METHOD THEREFOR
Title (en)
HIGH-STRENGTH THICK STEEL PLATE FOR CONSTRUCTION HAVING EXCELLENT CHARACTERISTICS FOR PREVENTING DIFFUSION OF BRITTLE CRACKS, AND PRODUCTION METHOD THEREFOR
Title (de)
HOCHFESTE DICKE STAHLPLATTE ZUR KONSTRUKTION MIT HERVORRAGENDEN MAGNETISCHEN EIGENSCHAFTEN ZUR VERHINDERUNG DER DIFFUSION VON SPRÖDEN RISSEN UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
PLAQUE D'ACIER ÉPAISSE DE HAUTE RÉSISTANCE MÉCANIQUE POUR STRUCTURE DOTÉE D'EXCELLENTES PROPRIÉTÉS D'ARRÊT DE PROPAGATION DE FISSURES CASSANTES, ET PROCÉDÉ DE FABRICATION DE CELLE-CI
Publication
Application
Priority
- JP 2011285570 A 20111227
- JP 2012111158 A 20120515
- JP 2012063409 W 20120518
Abstract (en)
[origin: EP2799584A1] Provided is a high-strength thick steel plate for structural use having a thickness of 50 mm or more and excellent brittle crack arrestability which can be preferably used for ships and a method for manufacturing the steel plate. The steel plate with excellent brittle crack arrestability has a metallographic structure mainly including a bainite phase, a texture in which the integration degree I of the RD//(110) plane in a central portion in the thickness direction is 1.5 or more, and a Charpy fracture appearance transition temperature vTrs in a surface portion and the central portion in the thickness direction of -40°C or lower. Further, the steel plate preferably has the Charpy fracture appearance transition temperature and the integration degree I of the RD//(110) plane in the central portion in the thickness direction satisfying the relational expression (1) below: vTrs 1 / 2 ¢ t - 12 × I RD / / 110 ¢ 1 / 2 ¢ t ‰¤ - 70 where vTrs (1/2t) : fracture appearance transition temperature (°C) in the central portion in the thickness direction and I RD//(110) [1/2t] : integration degree of the RD//(110) plane in the central portion in the thickness direction.
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/14 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP)
C21D 8/02 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0263 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C21D 2201/05 (2013.01); C21D 2211/002 (2013.01)
Citation (search report)
- [X] JP 2007254767 A 20071004 - NIPPON STEEL CORP
- [X] JP 2011052243 A 20110317 - NIPPON STEEL CORP
- [A] JP 2009068050 A 20090402 - KOBE STEEL LTD
- [A] JP 2009185343 A 20090820 - JFE STEEL CORP
- [A] JP 2008214652 A 20080918 - JFE STEEL KK
- [A] JP 2008261030 A 20081030 - NIPPON STEEL CORP
- [A] JP 2004143555 A 20040520 - JFE STEEL KK
- [A] JP 2011105963 A 20110602 - NIPPON STEEL CORP
- [X] DATABASE WPI Week 200770, Derwent World Patents Index; AN 2007-746606, XP002733006
- See references of WO 2013099318A1
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
DOCDB simple family (publication)
EP 2799584 A1 20141105; EP 2799584 A4 20150107; EP 2799584 B1 20190102; BR 112014015779 A2 20170613; BR 112014015779 A8 20170704; BR 112014015779 B1 20190409; CN 104024462 A 20140903; CN 104024462 B 20160323; JP 2013151732 A 20130808; JP 5304925 B2 20131002; KR 101588258 B1 20160125; KR 20140097463 A 20140806; WO 2013099318 A1 20130704
DOCDB simple family (application)
EP 12863408 A 20120518; BR 112014015779 A 20120518; CN 201280065286 A 20120518; JP 2012063409 W 20120518; JP 2012111158 A 20120515; KR 20147017473 A 20120518