EP 1807542 A1 20070718 - HIGH-STRENGTH STEEL STRIP OR SHEET EXHIBITING TWIP PROPERTIES AND METHOD FOR PRODUCING SAID STRIP BY DIRECT STRIP CASTING "
Title (en)
HIGH-STRENGTH STEEL STRIP OR SHEET EXHIBITING TWIP PROPERTIES AND METHOD FOR PRODUCING SAID STRIP BY DIRECT STRIP CASTING "
Title (de)
HÖHERFESTES, TWIP-EIGENSCHAFTEN AUFWEISENDES STAHLBAND ODER -BLECH UND VERFAHREN ZU DESSEN HERSTELLUNG MITTELS "DIRECT STRIP CASTING "
Title (fr)
BANDE OU TOLE D'ACIER EXTREMEMENT RESISTANTE A PROPRIETES TWIP ET PROCEDE DE FABRICATION DE LADITE BANDE A L'AIDE DE LA "COULEE DIRECTE DE BANDES"
Publication
Application
Priority
EP 2004012407 W 20041103
Abstract (en)
[origin: WO2006048034A1] The inventive method for producing cold-formable high-strength steel strips or sheets exhibiting TWIP properties consists of successive working steps carried out without interruption, wherein a molten material has the following composition (in mass %): 0.003 1.50 mass % C, 1.00 30. 00 mass % Mn, = 10.00 mass % Ni, = 8.00 mass % Si, = 10.00 mass % Al, = 10.00 mass % Cr, = 0.60 mass % N, = 3.00 mass % Cu, = 0,40 mass % P and = 0,15 mass % S, selectively one or several elements of a Se, Te, V, Ti, Nb, B, REM, Mo, W, Co, Ca and Mg group, provided that a total content in Se and Te is = 0,25 %, a total content in an V, Ti, Nb, B, REM is = 4,00 %, a total content in Mo, W, Co is = 1,50 % and a total content in Ca and Mg is = 0,50 %, the rest being iron and steel production impurities, wherein the content in Sn, Sb, Zr, Ta and As whose total content is equal to or less than 0.30 mass % is included in said impurities. Said composition is applied to a conveyor belt and is cooled thereon until it is solidified into a pre-strip, said pre-strip is removed from the conveyor belt, the removed pre-strip is exposed to heat treatment and is heat-rolled at a hot-rolling temperature of 700 °C, thereby making it possible to obtain a hot-rolled strip whose structure is completely recrystalised and which is wound an a winding temperature up to of 750 °C.
IPC 8 full level
C21D 8/02 (2006.01); C21D 6/00 (2006.01); C21D 8/04 (2006.01); C21D 9/46 (2006.01); C22C 38/04 (2006.01)
CPC (source: EP US)
C21D 6/005 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 8/0215 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); Y10T 29/49991 (2015.01 - EP US)
Citation (search report)
See references of WO 2006048034A1
Citation (examination)
JP H04259325 A 19920914 - SUMITOMO METAL IND & DATABASE WPI Week 199243, Derwent World Patents Index; Class M21, AN 1992-355135
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006048034 A1 20060511; BR PI0419185 A 20071218; CN 101065503 A 20071031; EP 1807542 A1 20070718; JP 2008519160 A 20080605; US 2009010793 A1 20090108
DOCDB simple family (application)
EP 2004012407 W 20041103; BR PI0419185 A 20041103; CN 200480044461 A 20041103; EP 04797547 A 20041103; JP 2007539465 A 20041103; US 71849804 A 20041103