EP 1929055 B1 20100901 - METHOD FOR TREATING A STEEL STRIP
Title (en)
METHOD FOR TREATING A STEEL STRIP
Title (de)
VERFAHREN ZUR BEHANDLUNG VON STAHLBAND
Title (fr)
PROCEDE DE TRAITEMENT D'UN FEUILLARD EN ACIER
Publication
Application
Priority
- EP 2006006184 W 20060627
- DE 102005045466 A 20050922
Abstract (en)
[origin: WO2007033711A1] The present invention relates to a method for treating a steel strip, particularly a steel strip made of highly resistant heat-treated steel, by cold rolling. The inventive method comprises at least a first step of heat treatment consisting of recrystallization annealing and at least another subsequent step of heat treatment consisting of hardening. Said method is characterized in that the time-temperature curve during the first step of heat treatment is chosen in such a way that only a partial recrystallization takes place and that the elongated structure produced by the previous strain-hardening is partially conserved. The inventive method enables reducing significantly the annealing time and annealing temperature during recrystallization annealing while at the same time reducing the annealing time during shape hardening. The processing chain can be reduced by more rapid annealing cycles, the reduction of the annealing temperature leading to significant energy savings. Said method allows producing e.g. semifinished sheet metal products for vehicle body components having an optimized strength/elongation ratio.
IPC 8 full level
CPC (source: EP)
C21D 1/18 (2013.01); C21D 1/673 (2013.01); C21D 6/005 (2013.01); C21D 8/02 (2013.01); C21D 8/0205 (2013.01); C21D 8/0247 (2013.01); C21D 8/0405 (2013.01); C21D 8/0447 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102005045466 A1 20070329; DE 102005045466 B4 20151029; AT E479781 T1 20100915; DE 502006007789 D1 20101014; EP 1929055 A1 20080611; EP 1929055 B1 20100901; WO 2007033711 A1 20070329
DOCDB simple family (application)
DE 102005045466 A 20050922; AT 06754580 T 20060627; DE 502006007789 T 20060627; EP 06754580 A 20060627; EP 2006006184 W 20060627