EP 2489748 B1 20171213 - Hot-rolled steel surface product produced from a complex phase steel and method for the manufacture
Title (en)
Hot-rolled steel surface product produced from a complex phase steel and method for the manufacture
Title (de)
Aus einem Komplexphasenstahl hergestelltes warmgewalztes Stahlflachprodukt und Verfahren zu dessen Herstellung
Title (fr)
Produit plat en acier laminé à chaud fabriqué à partir d'un acier à phase complexe et son procédé de fabrication
Publication
Application
Priority
EP 11154973 A 20110218
Abstract (en)
[origin: EP2489748A1] The hot rolled flat steel product comprises a complex-phase steel, iron, inevitable impurities including carbon (0.17 wt.%), manganese (2.05-2.2 wt.%), silicon (0.95 wt.%), aluminum (0.02-0.05 wt.%), phosphorus (up to 0.1 wt.%), sulfur (up to 0.01 wt.%), chromium (0.30-0.40 wt.%), optionally molybdenum, titanium (0.11-0.13 wt.%) and boron (0.001-0.002 wt.%), where the sum of chromium and molybdenum is 0.25-0.7 wt.%, and a structure having 10 vol.% of austenite, 10-60 vol.% of martensite, less than 30 vol.% of ferrite and 10 vol.% of bainite. An independent claim is included for a method of producing a hot-rolled flat steel product.
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/38 (2006.01)
CPC (source: EP KR US)
C21D 8/02 (2013.01 - KR); C21D 8/0226 (2013.01 - EP US); C21D 8/0268 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - KR); C22C 38/06 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C22C 38/38 (2013.01 - EP KR US); C21D 2211/002 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US)
Citation (examination)
- US 2009277547 A1 20091112 - SAITO KENJI [JP], et al
- PYSHMINTSEV I Y ET AL: "Microstructure and properties of hot-rolled high strength multiphase steels for automotive application", STEEL RESEARCH, DUESSELDORF, DE, vol. 73, no. 9, 1 September 2002 (2002-09-01), pages 392 - 402, XP008139730, ISSN: 0177-4832
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 2489748 A1 20120822; EP 2489748 A9 20121010; EP 2489748 B1 20171213; CA 2825240 A1 20120823; CN 103380217 A 20131030; CN 103380217 B 20150923; JP 2014510838 A 20140501; JP 5864619 B2 20160217; KR 20140005293 A 20140114; US 2014041767 A1 20140213; WO 2012110165 A1 20120823
DOCDB simple family (application)
EP 11154973 A 20110218; CA 2825240 A 20111229; CN 201180067938 A 20111229; EP 2011074251 W 20111229; JP 2013553818 A 20111229; KR 20137024831 A 20111229; US 201113985420 A 20111229