EP 2767601 B1 20181010 - Cold rolled steel flat product for deep drawing applications and method for its production
Title (en)
Cold rolled steel flat product for deep drawing applications and method for its production
Title (de)
Kaltgewalztes Stahlflachprodukt für Tiefziehanwendungen und Verfahren zu seiner Herstellung
Title (fr)
Produit plat en acier laminé à froid pour applications d'emboutissage profond et son procédé de fabrication
Publication
Application
Priority
EP 13155225 A 20130214
Abstract (en)
[origin: EP2767601A1] The cold-rolled flat product made of steel, is claimed. The steel contains iron, unavoidable impurities, carbon, aluminum, niobium, titanium, phosphorus, sulfur, nitrogen, and optionally elements including manganese, rare earth metal, silicon, zirconium, vanadium, tungsten, molybdenum, chromium, cobalt, nickel, boron, copper and calcium. The product has deep drawability (r-value) of 1.3, and contains 0-0.1 vol.% of carbides. A ratio of a grain length in a rolling direction to a width in a transverse direction of a grain of the flat steel product is less than 1.5. The cold-rolled flat product made of steel, is claimed. The steel contains iron, unavoidable impurities, 0.05 wt.% of carbon, 6.8 wt.% of aluminum, 0.1-0.15 wt.% of niobium, 0.15-0.3 wt.% of titanium, less than 0.1 wt.% of phosphorus, less than 0.03 wt.% of sulfur, less than 0.1 wt.% of nitrogen, and optionally elements including 0-0.1 wt.% of manganese, 0-0.2 wt.% of rare earth metal, 0-2 wt.% of silicon, 0-1 wt.% of zirconium, 0-1 wt.% of vanadium, 0-1 wt.% of tungsten, 0-1 wt.% of molybdenum, 0-3 wt.% of chromium, 0-1 wt.% of cobalt, 0-2 wt.% of nickel, 0-0.1 wt.% of boron, 0-3 wt.% of copper and 0-0.015 wt.% of calcium. A ratio of titanium to niobium is 1.5-2.5. The product has deep drawability (r-value) of 1.3, and contains 0-0.1 vol.% of carbides. A ratio of a grain length in a rolling direction to a width in a transverse direction of a grain of the flat steel product is less than 1.5 An independent claim is included for a method of producing a cold-rolled flat product.
IPC 8 full level
C21D 8/04 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/48 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01)
CPC (source: EP US)
C21D 1/26 (2013.01 - EP US); C21D 6/004 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C21D 8/0405 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C21D 9/48 (2013.01 - EP US); C22C 38/001 (2013.01 - US); C22C 38/004 (2013.01 - US); C22C 38/02 (2013.01 - US); C22C 38/04 (2013.01 - US); C22C 38/06 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/44 (2013.01 - US); C22C 38/46 (2013.01 - US); C22C 38/48 (2013.01 - US); C22C 38/50 (2013.01 - US); C21D 8/0226 (2013.01 - EP US); C21D 8/0236 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP US); C21D 2211/005 (2013.01 - 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
DOCDB simple family (publication)
EP 2767601 A1 20140820; EP 2767601 B1 20181010; BR 112015019413 A2 20170718; CN 105121673 A 20151202; CN 110295317 A 20191001; JP 2016511795 A 20160421; JP 6383368 B2 20180829; KR 102193066 B1 20201221; KR 20150119230 A 20151023; US 10513762 B2 20191224; US 2016017467 A1 20160121; WO 2014125016 A1 20140821
DOCDB simple family (application)
EP 13155225 A 20130214; BR 112015019413 A 20140213; CN 201480021223 A 20140213; CN 201910355506 A 20140213; EP 2014052810 W 20140213; JP 2015557422 A 20140213; KR 20157024979 A 20140213; US 201414767741 A 20140213