EP 2171112 B1 20111123 - METHOD FOR PRODUCING STEEL SHEETS HAVING HIGH RESISTANCE AND DUCTILITY CHARACTERISTICS, AND SHEETS THUS OBTAINED
Title (en)
METHOD FOR PRODUCING STEEL SHEETS HAVING HIGH RESISTANCE AND DUCTILITY CHARACTERISTICS, AND SHEETS THUS OBTAINED
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES STAHLBLECHS MIT SEHR HOHEN FESTIGKEITS- UND BIEGBARKEITSEIGENSCHAFTEN UND IN DIESEM VERFAHREN HERGESTELLTE BLECHE
Title (fr)
PROCEDE DE FABRICATION DE TÔLES D'ACIER A HAUTES CARACTERISTIQUES DE RESISTANCE ET DE DUCTILITE, ET TÔLES AINSI PRODUITES
Publication
Application
Priority
- FR 2008000993 W 20080709
- EP 07290908 A 20070719
- EP 08830766 A 20080709
Abstract (en)
[origin: EP2020451A1] Hot-rolled steel sheet having a strength of greater than 800 MPa, and an elongation at break of greater than 10%, comprises (wt.%): carbon (0.05-0.09); manganese (1-2); aluminum (0.015-0.05); silicon (0.1-0.3); molybdenum (0.1-0.4); sulfur (= 0.01); phosphorus (= 0.025); nitrogen (0.003-0.009); vanadium (0.12-0.22); titanium (= 0.009); niobium (= 0.02); and optionally chromium (= 0.45), where the rest of the composition is constituted of iron and unavoidable impurities resulting from elaboration. Independent claims are included for: (1) a weld assembly done by the steel sheet, where the sheet is welded by beam at high energy density; and (2) a preparation of the hot-rolled steel sheet comprising supplying the steel composition, casting of semi finished product from the steel, subjecting the semi finished product to a temperature of greater than 1150[deg] C, hot-rolling the semi finished product at end temperature of rolling (TFL), where the microstructure of the steel is entirely austenitic to obtain the sheet, then cooling the sheet at a cooling speed (VR) of 75-200[deg] C/second, and coiling the sheet at a winding temperature (Tbob) of 500-600[deg] C.
IPC 8 full level
C22C 38/04 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01)
CPC (source: EP KR US)
C21D 1/18 (2013.01 - KR); C21D 6/002 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0263 (2013.01 - EP US); C21D 9/46 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/22 (2013.01 - EP KR US); C22C 38/24 (2013.01 - EP KR US); C22C 38/26 (2013.01 - EP US); C22C 38/38 (2013.01 - EP KR US); C23C 2/02 (2013.01 - EP KR US); C23C 2/0224 (2022.08 - EP KR US); C23C 2/024 (2022.08 - EP KR US); C23C 2/06 (2013.01 - US); C23C 2/12 (2013.01 - US); C21D 2211/002 (2013.01 - KR); Y10T 428/12757 (2015.01 - EP US); Y10T 428/12799 (2015.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2020451 A1 20090204; AR 067594 A1 20091014; AT E534756 T1 20111215; BR PI0814514 A2 20150203; BR PI0814514 B1 20190903; CA 2694069 A1 20090319; CA 2694069 C 20130521; CN 101784688 A 20100721; CN 101784688 B 20111123; EP 2171112 A1 20100407; EP 2171112 B1 20111123; ES 2375429 T3 20120229; JP 2010533791 A 20101028; JP 5298127 B2 20130925; KR 101892423 B1 20180827; KR 20100037147 A 20100408; KR 20130010030 A 20130124; KR 20140044407 A 20140414; KR 20150123957 A 20151104; KR 20180014843 A 20180209; MA 31525 B1 20100701; PL 2171112 T3 20120430; RU 2010105699 A 20110827; RU 2451764 C2 20120527; UA 98798 C2 20120625; US 10214792 B2 20190226; US 10428400 B2 20191001; US 2010221573 A1 20100902; US 2015203932 A1 20150723; US 2018148806 A1 20180531; US 2018163282 A9 20180614; WO 2009034250 A1 20090319; ZA 201000290 B 20101027
DOCDB simple family (application)
EP 07290908 A 20070719; AR P080103095 A 20080718; AT 08830766 T 20080709; BR PI0814514 A 20080709; CA 2694069 A 20080709; CN 200880104086 A 20080709; EP 08830766 A 20080709; ES 08830766 T 20080709; FR 2008000993 W 20080709; JP 2010516534 A 20080709; KR 20107003457 A 20080709; KR 20127034336 A 20080709; KR 20147007669 A 20080709; KR 20157029946 A 20080709; KR 20187002754 A 20080709; MA 32523 A 20100118; PL 08830766 T 20080709; RU 2010105699 A 20080709; UA A201001690 A 20080709; US 201414575475 A 20141218; US 201815879944 A 20180125; US 66918808 A 20080709; ZA 201000290 A 20100115