EP 1375694 B2 20101117 - Hot-rolled steel strip and method for manufacturing the same
Title (en)
Hot-rolled steel strip and method for manufacturing the same
Title (de)
Verfahren zur Herstellung eines warmgewalzten Stahlbandes
Title (fr)
Procédé de la fabrication d'une bande d'acier laminée à chaud
Publication
Application
Priority
FI 20021188 A 20020619
Abstract (en)
[origin: EP1375694A1] A hot-rolled steel strip rolled to a final thickness that is at least 2 mm but no more than 12 mm, with a microstructure comprising at least 95 % martensite and/or bainite. The steel contains, in percentages by weight: 0.08 % - 0.16 % C, 0.5 % - 1.5% Cr and/or 0.1 % - 0.5 % Mo, ≤ 0.015 % S and ≤ 0.03 % P, 0.01 % - 0.08 % Al, as well as 0.6 % - 1.1 % Mn, and 0.1 % - 0.3 % Si, the rest being Fe and unavoidable impurities. The tensile strength of the steel strip is 700 Mpa - 1500 Mpa at a tensile elongation that has an A5 value of at least 6 %, and the yield strength is 600 Mpa - 1400 Mpa.
IPC 8 full level
C22C 38/18 (2006.01); C21D 1/18 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); C22C 38/22 (2006.01); C22C 38/28 (2006.01)
CPC (source: EP)
C21D 8/0226 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/22 (2013.01); C22C 38/28 (2013.01); C21D 2211/002 (2013.01); C21D 2211/008 (2013.01)
Citation (opposition)
Opponent :
- JP H06248341 A 19940906 - SUMITOMO METAL IND
- WO 9802589 A1 19980122 - THYSSEN STAHL AG [DE], et al
- US 2001049956 A1 20011213 - BANO XAVIER [FR], et al
- VAN DER VOORT G.F.: "Atlas of Time-Temperature Diagrams for Irons and Steels", 1991, ASM INTERNATIONAL, ISBN: 0-87170-415-3, pages: 267
- IRVINE K.J.; PICKERING F.B.: "Low-carbon Bainitic Steels", JOURNAL OF THE IRON AND STEEL INSTITUTE, December 1957 (1957-12-01), pages 292 - 309
- IRVINE K.J.; PICKERING F.B.: "The impact properties of low carbon bainitic steels", JOURNAL OF THE IRON AND STEEL INSTITUTE, June 1963 (1963-06-01), pages 518 - 531
- MAJKA T.F.; MATLOCK D.K.; KRAUSS G.: "Development of Microstructural Banding in Low-Alloy Steel with simulated Mn Segregation", METALLURGICAL AND MATERIALS TRANSACTIONS A, vol. 33A, June 2002 (2002-06-01), SE, pages 1627
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1375694 A1 20040102; EP 1375694 B1 20050427; EP 1375694 B2 20101117; AT E294256 T1 20050515; DE 60300561 D1 20050602; DE 60300561 T2 20060223; DE 60300561 T3 20110609; ES 2238669 T3 20050901; ES 2238669 T5 20110512; FI 114484 B 20041029; FI 20021188 A0 20020619; FI 20021188 A 20031220; PT 1375694 E 20050729; SI 1375694 T1 20110331; SI 1375694 T2 20051031
DOCDB simple family (application)
EP 03396059 A 20030618; AT 03396059 T 20030618; DE 60300561 T 20030618; ES 03396059 T 20030618; FI 20021188 A 20020619; PT 03396059 T 20030618; SI 200330048 T 20030618