EP 4259835 A1 20231018 - LOW DENSITY COLD ROLLED AND ANNEALED STEEL SHEET, METHOD OF PRODUCTION THEREOF AND USE OF SUCH STEEL TO PRODUCE VEHICLE PARTS
Title (en)
LOW DENSITY COLD ROLLED AND ANNEALED STEEL SHEET, METHOD OF PRODUCTION THEREOF AND USE OF SUCH STEEL TO PRODUCE VEHICLE PARTS
Title (de)
KALTGEWALZTES UND GEGLÜHTES STAHLBLECH VON NIEDRIGER DICHTE, VERFAHREN ZUR HERSTELLUNG DAVON UND VERWENDUNG SOLCH EINES STAHLS ZUR HERSTELLUNG VON FAHRZEUGTEILEN
Title (fr)
FEUILLE D'ACIER À BASSE DENSITÉ LAMINÉE À FROID ET RECUITE, SON PROCÉDÉ DE PRODUCTION ET UTILISATION D'UN TEL ACIER POUR PRODUIRE DES PIÈCES DE VÉHICULE
Publication
Application
Priority
IB 2020061771 W 20201210
Abstract (en)
[origin: WO2022123299A1] A low density cold rolled and annealed steel sheet comprising of 0.12% ≤ carbon ≤ 0.25%, 3% ≤manganese ≤10%, 3.5% ≤ aluminum ≤ 6.5%, 0% ≤ phosphorus ≤ 0.1%, 0% ≤sulfur ≤0.03%, 0% ≤ nitrogen ≤ 0.1%, 0% ≤ silicon ≤ 2%, 0.01% ≤ niobium ≤ 0.03%, 0.01% ≤ titanium ≤ 0.2%,0% ≤ molybdenum ≤ 0.5%, 0% ≤ chromium ≤ 0.6%, 0.01% ≤ copper ≤ 2.0%,0.01%≤nickel ≤3.0%, 0% ≤calcium≤ 0.005%, 0% ≤ boron ≤ 0.01%, 0% ≤Magnesium≤ 0.005%, 0% ≤ Zirconium ≤ 0.005%, 0% ≤ Cerium ≤ 0.1%,and the balance including iron, the steel sheet having a microstructure comprising 60% to 90% Delta ferrite, 8% to 30% of residual austenite having average grain size between 0.6 and 2 microns, 1.0% to 10% of alpha-ferrite having average grain size between 0.6 and 2 microns and 0% to 2% of kappa precipitates (Fe,Mn)3AICx, where x is strictly lower than 1.
IPC 8 full level
C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/38 (2006.01)
CPC (source: EP KR US)
C21D 8/005 (2013.01 - US); C21D 8/0205 (2013.01 - EP); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0236 (2013.01 - EP KR US); C21D 8/0273 (2013.01 - EP KR US); C21D 9/46 (2013.01 - EP KR); C22C 38/001 (2013.01 - KR US); C22C 38/002 (2013.01 - EP); C22C 38/005 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/08 (2013.01 - EP); C22C 38/14 (2013.01 - EP); C22C 38/16 (2013.01 - EP); C22C 38/38 (2013.01 - EP); C22C 38/42 (2013.01 - KR); C22C 38/58 (2013.01 - KR); C23C 2/06 (2013.01 - KR); C23C 2/12 (2013.01 - KR); C21D 2211/001 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP US); C21D 2211/005 (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
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022123299 A1 20220616; CA 3202801 A1 20220616; CN 116457480 A 20230718; EP 4259835 A1 20231018; JP 2024500090 A 20240104; KR 20230100739 A 20230705; MX 2023006699 A 20230620; US 2024052465 A1 20240215
DOCDB simple family (application)
IB 2020061771 W 20201210; CA 3202801 A 20201210; CN 202080107604 A 20201210; EP 20825255 A 20201210; JP 2023535429 A 20201210; KR 20237018647 A 20201210; MX 2023006699 A 20201210; US 202018265316 A 20201210