EP 3225702 A1 20171004 - STEEL WITH REDUCED DENSITY AND METHOD FOR PRODUCING A STEEL FLAT OR LONG PRODUCT MADE FROM SUCH STEEL
Title (en)
STEEL WITH REDUCED DENSITY AND METHOD FOR PRODUCING A STEEL FLAT OR LONG PRODUCT MADE FROM SUCH STEEL
Title (de)
STAHL MIT REDUZIERTER DICHTE UND VERFAHREN ZUR HERSTELLUNG EINES STAHLFLACH- ODER -LANGPRODUKTS AUS EINEM SOLCHEN STAHL
Title (fr)
ACIER A EPAISSEUR REDUITE ET PROCEDE DE FABRICATION D'UN PRODUIT ALLONGE OU PLAT EN ACIER A PARTIR D'UN TEL ACIER
Publication
Application
Priority
EP 16162652 A 20160329
Abstract (en)
[origin: WO2017167778A1] The invention relates to an iron-based reduced-density material, the mechanical properties of which make said material suitable for a broad range of applications, in particular in the automotive industry. For this purpose, the steel has a density of less than 7.25 kg/dm3 according to the invention and consists of (in wt%) C: up to 0.20%, Si: 0.1 - 3.50%, Mn: 0.1 - 3.50%, N: up to 0.020%, S: up to 0.40%, P: up to 0.009%, Al: 6.0 - 25.0%, Ti: 0.55 - 10.0%, Cr: up to 6.0%, Mo: up to 3.0%, Ni: up to 4.0%, V: up to 1.0%, W: up to 1.0%, Cu: up to 4%, B: up to 0.08%, Nb: up to 1.5%, the remainder iron and unavoidable production-related impurities. The microstructure of the steel has more than 85 vol% ferrite and up to 10 vol% austenite and, as the remainder, contents of intermetallic phases and fractions of carbide, nitride, bainite, or pearlite.
Abstract (de)
Die Erfindung stellt einen dichtereduzierten Werkstoff auf Eisenbasis zur Verfügung, dessen mechanische Eigenschaften ihn für ein breites Anwendungsspektrum insbesondere im Bereich der Automobilindustrie geeignet machen. Zu diesem Zweck weist der Stahl erfindungsgemäß eine Dichte von weniger als 7,25 kg/dm 3 und besteht aus (in Gew.-%) C: bis zu 0,20 %, Si: 0,1 - 3,50 %, Mn: 0,1 - 3,50 %, N: bis zu 0,020 % , S: bis zu 0,40 % , P: bis 0,009 %, Al: 6,0 - 25,0 %, Ti: 0,55 - 10,0 %, Cr: bis zu 6,0 %, Mo: bis zu 3,0 %, Ni: bis 4,0 %, V: bis 1,0 %, W: bis 1,0 %, Cu: bis 4 %, B: bis 0,08 %, Nb: bis 1,5 %, Rest Eisen und herstellungsbedingt unvermeidbare Verunreinigungen. Dabei weist das Gefüge des Stahls mehr als 85 Vol.-% Ferrit sowie bis zu 10 Vol.-% Austenit und als Rest Gehalte an intermetallischen Phasen sowie Anteile von Karbid, Nitrid, Bainit oder Perlit auf.
IPC 8 full level
C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/34 (2006.01); C22C 38/38 (2006.01); C22C 38/40 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP US)
C21D 8/0226 (2013.01 - EP US); C21D 8/0231 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/16 (2013.01 - EP US); C22C 38/18 (2013.01 - EP US); C22C 38/20 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/24 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C22C 38/34 (2013.01 - EP US); C22C 38/38 (2013.01 - EP US); C22C 38/40 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/54 (2013.01 - EP US); C22C 38/58 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US)
Citation (applicant)
- US 1892316 A 19321227 - ALTON MITCHELL H, et al
- DE 1262613 B 19680307 - LANGLEY ALLOYS LTD [GB]
- DE 102006030699 A1 20080103 - DAIMLER CHRYSLER AG [DE]
- DE 102005027258 A1 20061221 - DAIMLER CHRYSLER AG [DE]
- DE 102010012718 A1 20110929 - DAIMLER AG [DE], et al
- DE 10231125 A1 20030508 - DAIMLER CHRYSLER AG [DE]
- DE 10359786 A1 20050804 - DAIMLER CHRYSLER AG [DE]
- DE 19634524 A1 19980409 - KRUPP AG HOESCH KRUPP [DE], et al
- EP 2767601 A1 20140820 - THYSSENKRUPP STEEL EUROPE AG [DE]
- DE 102009031576 A1 20100325 - V&M DEUTSCHLAND GMBH [DE]
- DE 10035489 A1 20020131 - SCHAEFFLER WAELZLAGER OHG [DE]
- DE 102010006800 A1 20110317 - DAIMLER AG [DE]
- DE 102007047159 A1 20090305 - VOLKSWAGEN AG [DE]
- DE 102007056144 A1 20090520 - VOLKSWAGEN AG [DE]
- DE 1208080 B 19651230 - YAWATA IRON & STEEL CO
- GB 2186886 B 19891122 - NIPPON STEEL CORP [JP]
- DE 102005024029 B3 20070104 - UNIV FREIBERG TECH BERGAKAD [DE]
- DE 102005030413 B3 20070315 - UNIV FREIBERG TECH BERGAKAD [DE]
- DE 19900199 A1 20000713 - UEBACHS RALF [DE]
- G. FROMMEYER; E. J. DREWES; B. ENGL: "Physical and mechanical properties of iron-aluminium-(Mn, Si) lightweight steels", REVUE DE METALLURGIE, vol. 97, October 2000 (2000-10-01), pages 1245 - 1253, XP001124154
Citation (search report)
- [XYI] DE 2656076 A1 19770623 - HOOGOVENS IJMUIDEN BV
- [XYI] JP H11350087 A 19991221 - NIPPON STEEL CORP
- [YDA] EP 2767601 A1 20140820 - THYSSENKRUPP STEEL EUROPE AG [DE]
- [A] JP H05271873 A 19931019
- [A] WO 2013178629 A1 20131205 - THYSSENKRUPP STEEL EUROPE AG [DE]
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)
EP 3225702 A1 20171004; EP 3225702 B1 20200325; ES 2791887 T3 20201106; US 2019119771 A1 20190425; WO 2017167778 A1 20171005
DOCDB simple family (application)
EP 16162652 A 20160329; EP 2017057359 W 20170329; ES 16162652 T 20160329; US 201716089616 A 20170329