EP 3688203 A1 20200805 - FLAT STEEL PRODUCT AND METHOD FOR THE PRODUCTION THEREOF
Title (en)
FLAT STEEL PRODUCT AND METHOD FOR THE PRODUCTION THEREOF
Title (de)
STAHLFLACHPRODUKT UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
PRODUIT PLAT EN ACIER ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
EP 2017074642 W 20170928
Abstract (en)
[origin: WO2019063081A1] The invention relates to a bake hardening treatment of a suitable very high-strength flat steel product and to a method for producing such a flat steel product. The flat steel product consists of a steel that consists of (in wt%) 0.1-0.5% C, 1.0-3.0% Mn, 0.5-2.0% Si, 0.01-1.5% Al, 0.001-0.008% N, up to 0.02% P, up to 0.005% S and optionally one or more of the following elements: 0.01-1.0% Cr, 0.01-0.2% Mo, 0.001-0.01% B, and optionally a total of 0.005-0.2% V, Ti and Nb, the Ti proportion not being more than 0.10%, and, as the remainder, iron and unavoidable impurities. The flat steel product has a microstructure that consists of not more than 15 area % ferrite, not more than 5 area % bainite, at least 5 volume % residual austenite and at least 80 area % martensite, of which at least 75 area % is tempered martensite.
IPC 8 full level
C22C 38/00 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C21D 8/02 (2006.01); C21D 8/04 (2006.01); C21D 9/46 (2006.01); C21D 9/48 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/18 (2006.01); C23C 2/00 (2006.01); C23C 2/04 (2006.01); C23C 2/06 (2006.01); C23C 2/34 (2006.01); C23C 2/40 (2006.01)
CPC (source: EP US)
C21D 1/22 (2013.01 - EP); C21D 8/0236 (2013.01 - EP); C21D 8/0247 (2013.01 - EP); C21D 9/46 (2013.01 - EP); C22C 38/00 (2013.01 - EP); C22C 38/001 (2013.01 - EP); C22C 38/002 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP); C22C 38/12 (2013.01 - EP); C22C 38/14 (2013.01 - EP); C22C 38/18 (2013.01 - EP); C23C 2/06 (2013.01 - EP); C23C 2/29 (2022.08 - EP US); C23C 2/40 (2013.01 - EP); C25D 5/36 (2013.01 - EP); C25D 7/0614 (2013.01 - EP); C21D 6/002 (2013.01 - EP); C21D 6/005 (2013.01 - EP); C21D 6/008 (2013.01 - EP); C21D 8/0436 (2013.01 - EP); C21D 8/0447 (2013.01 - EP); C21D 9/48 (2013.01 - EP); C21D 2211/001 (2013.01 - EP); C21D 2211/008 (2013.01 - EP)
Citation (search report)
See references of WO 2019063081A1
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)
WO 2019063081 A1 20190404; CN 111148853 A 20200512; CN 111148853 B 20220415; EP 3688203 A1 20200805; EP 3688203 B1 20220427; EP 4043603 A1 20220817; ES 2921013 T3 20220816; JP 2021503040 A 20210204; JP 7105302 B2 20220722; PL 3688203 T3 20220829
DOCDB simple family (application)
EP 2017074642 W 20170928; CN 201780095388 A 20170928; EP 17780063 A 20170928; EP 22159990 A 20170928; ES 17780063 T 20170928; JP 2020517460 A 20170928; PL 17780063 T 20170928