EP 3292228 B1 20200812 - FLAT STEEL PRODUCT AND METHODE FOR PRODUCTION OF SAID PRODUCT
Title (en)
FLAT STEEL PRODUCT AND METHODE FOR PRODUCTION OF SAID PRODUCT
Title (de)
STAHLFLACHPRODUKT UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
PRODUIT EN ACIER PLAT ET PROCÉDÉ DE FABRICATION DECELLE-CI
Publication
Application
Priority
- EP 2015059968 W 20150506
- EP 2016059960 W 20160504
Abstract (en)
[origin: WO2016177420A1] The invention relates to a flat steel product, having a tensile strength Rm ≥ 950 MPa, a yield strength ≥ 800 MPa and an elongation at break A50 ≥ 8%. According to the invention, the flat steel product consists of steel which contains (in weight-%) 0.05 - 0.20% C, 0.2 - 1.5% Si, 0.01 - 1.5% Al, 1.0 - 3.0% Mn, ≤ 0.02% P, ≤ 0.005% S, ≤ 0.008% N, and in each case optionally 0.05 - 1.0%, 0.05 - 0.2% Mo, 0.005 - 0.2% Ti, 0.001 - 0.05% Nb, 0.0001 - 0.005% B, the remainder being Fe and inevitable impurities, wherein: 1.5 ≤ ψ ≤ 3, with ψ= (%C+%Mn/5+%Cr/6) / (%Al+%Si) and %C, %Mn, %Cr, %Al, %Si being the respective C, Mn, Cr, AI or Si content of the steel. At the same time the flat steel product has a structure which consists of (in area percentage) ≤ 5% bainite, ≤ 5% polygonal ferrite, ≥ 90% martensite and ≤ 2% by volume residual austenite, at least half of the martensite being tempered martensite. The invention also relates to a method for producing such a flat steel product.
IPC 8 full level
C22C 38/02 (2006.01); C21D 1/18 (2006.01); C21D 1/22 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/14 (2006.01); C22C 38/22 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01); C23C 2/02 (2006.01); C23C 2/06 (2006.01); C23C 2/28 (2006.01)
CPC (source: EP KR US)
C21D 1/18 (2013.01 - EP KR US); C21D 1/22 (2013.01 - EP KR US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/0205 (2013.01 - KR); C21D 8/0247 (2013.01 - KR); C21D 9/46 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP KR US); C22C 38/12 (2013.01 - KR); C22C 38/14 (2013.01 - EP KR US); C22C 38/22 (2013.01 - EP KR US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP KR US); C22C 38/32 (2013.01 - EP KR US); C22C 38/38 (2013.01 - EP KR US); C23C 2/0224 (2022.08 - EP KR US); C23C 2/06 (2013.01 - EP US); C23C 2/29 (2022.08 - EP KR US); C23C 2/40 (2013.01 - KR US); C23F 17/00 (2013.01 - US); C21D 2211/001 (2013.01 - EP KR US); C21D 2211/002 (2013.01 - EP KR US); C21D 2211/005 (2013.01 - EP KR US); C21D 2211/008 (2013.01 - EP KR 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)
WO 2016177420 A1 20161110; CN 107580634 A 20180112; EP 3292228 A1 20180314; EP 3292228 B1 20200812; ES 2820348 T3 20210420; JP 2018518593 A 20180712; JP 6788612 B2 20201125; KR 102594922 B1 20231027; KR 20180003581 A 20180109; MX 2017014090 A 20180301; US 2019119774 A1 20190425; WO 2016177763 A1 20161110; ZA 201707321 B 20221130
DOCDB simple family (application)
EP 2015059968 W 20150506; CN 201680026312 A 20160504; EP 16723293 A 20160504; EP 2016059960 W 20160504; ES 16723293 T 20160504; JP 2017557206 A 20160504; KR 20177034819 A 20160504; MX 2017014090 A 20160504; US 201615571379 A 20160504; ZA 201707321 A 20171027