EP 1319725 B1 20041020 - Hot strip manufacturing process
Title (en)
Hot strip manufacturing process
Title (de)
Verfahren zum Herstellen von Warmband
Title (fr)
Procédé pour la fabrication d'une bande à chaud
Publication
Application
Priority
DE 10161465 A 20011213
Abstract (en)
[origin: EP1319725A2] Production of a hot strip having a tensile strength of at least 800 N/mm<2> comprises casting a steel into a pre-material, such as thin slabs or cast strip; hot rolling the pre-material at a final temperature lying above the Ar3 temperature to form a hot strip; cooling in a first cooling step at a cooling speed of at least 150 K/s to 500-700 degrees C; and cooling in a second cooling step after a 3-10 seconds cooling pause to a coiling temperature. The coiling temperature is more than 580 degrees C for hot strips having a yield point of more than 690 MPa and a tensile strength of less than 900 MPa. The coiling temperature is 580 degrees C or less for hot strips having a yield point of not more than 690 MPa and a tensile strength of less than 900 MPa. The coiling temperature is not more than 250 degrees C for hot strips having a tensile strength of less than 900 MPa. <??>The steel contains (in wt.%): 0.03-0.10 C, not more than 0.8 Si, 1.2-2.0 Mn, 0.02-0.06 Al, not more than 0.5 Cr, not more than 0.2 Ti, not more than 0.08 Nb, less than 0.005 Ca, less than 0.05 Cu, less than 0.05 Ni, less than 0.02 P, less than 0.005 S, less than 0.01 N and a balance of Fe. <??>Preferred Features: The steel contains 0.05-0.07 wt.% C and 0.3-0.8 wt.% Si.
IPC 1-7
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/06 (2006.01)
CPC (source: EP)
C21D 8/0226 (2013.01); C21D 8/021 (2013.01); C21D 8/0221 (2013.01); C21D 8/0263 (2013.01); C21D 8/0278 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
EP 1319725 A2 20030618; EP 1319725 A3 20031210; EP 1319725 B1 20041020; AT E280248 T1 20041115; DE 10161465 C1 20030213; DE 50201348 D1 20041125; ES 2231638 T3 20050516
DOCDB simple family (application)
EP 02025150 A 20021109; AT 02025150 T 20021109; DE 10161465 A 20011213; DE 50201348 T 20021109; ES 02025150 T 20021109