EP 3239329 A1 20171101 - STRUCTURAL ULTRA-THICK STEEL HAVING EXCELLENT RESISTANCE TO BRITTLE CRACK PROPAGATION, AND PRODUCTION METHOD THEREFOR
Title (en)
STRUCTURAL ULTRA-THICK STEEL HAVING EXCELLENT RESISTANCE TO BRITTLE CRACK PROPAGATION, AND PRODUCTION METHOD THEREFOR
Title (de)
ULTRADICKER BAUSTAHL MIT AUSGEZEICHNETER BESTÄNDIGKEIT GEGEN SPRÖDRISSAUSBREITUNG UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER DE STRUCTURE ULTRA ÉPAIS PRÉSENTANT UNE EXCELLENTE RÉSISTANCE À LA PROPAGATION DE FISSURES FRAGILES ET SON PROCÉDÉ DE PRODUCTION
Publication
Application
Priority
- KR 20140188465 A 20141224
- KR 2015013557 W 20151211
Abstract (en)
The present invention provides structural ultra-thick steel having excellent resistance to brittle crack propagation and a production method therefor. Provided according to the present invention are: structural ultra-thick steel, which has excellent resistance to brittle crack propagation, comprises 0.02-0.1 wt % of C, 0.8-2.5 wt % of Mn, 0.05-1.5 wt % of Ni, 0.005-0. 1 wt % of Nb, and 0.005-0. 1 wt % of Ti with the remainder being Fe and other inevitable impurities, and has microstructures including one structure selected from the group consisting of a single-phase structure of ferrite, a single-phase structure of bainite, a complex-phase structure of ferrite and bainite, a complex-phase structure of ferrite and pearlite, and a complex-phase structure of ferrite, bainite, and pearlite; and a production method therefor. According to one aspect of the present invention, ultra-thick structural steel, which has excellent resistance to brittle crack propagation and has excellent yield strength and an excellent impact transition temperature in the center, can be obtained.
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01)
CPC (source: CN EP KR US)
C21D 6/005 (2013.01 - EP US); C21D 8/02 (2013.01 - EP KR US); C21D 8/0205 (2013.01 - EP US); C21D 8/021 (2013.01 - EP US); C21D 8/0226 (2013.01 - CN EP US); C21D 8/0247 (2013.01 - EP US); C22C 38/00 (2013.01 - EP KR US); C22C 38/04 (2013.01 - CN EP KR US); C22C 38/08 (2013.01 - CN EP KR US); C22C 38/12 (2013.01 - CN EP KR US); C22C 38/14 (2013.01 - CN EP US); C21D 2211/002 (2013.01 - CN EP US); C21D 2211/005 (2013.01 - CN EP US); C21D 2211/009 (2013.01 - CN EP US)
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 3239329 A1 20171101; EP 3239329 A4 20171101; EP 3239329 B1 20191009; EP 3239329 B8 20191120; CN 107109591 A 20170829; JP 2018504524 A 20180215; JP 6475839 B2 20190227; KR 101657827 B1 20160920; KR 20160078668 A 20160705; US 2017342518 A1 20171130; WO 2016105003 A1 20160630
DOCDB simple family (application)
EP 15873530 A 20151211; CN 201580070961 A 20151211; JP 2017532807 A 20151211; KR 20140188465 A 20141224; KR 2015013557 W 20151211; US 201515535570 A 20151211