EP 1453984 A1 20040908 - METHOD FOR THE PRODUCTION OF HOT STRIP OR SHEET FROM A MICRO-ALLOYED STEEL
Title (en)
METHOD FOR THE PRODUCTION OF HOT STRIP OR SHEET FROM A MICRO-ALLOYED STEEL
Title (de)
VERFAHREN ZUM HERSTELLEN VON WARMBAND ODER -BLECH AUS EINEM MIKROLEGIERTEN STAHL
Title (fr)
PROCEDE DE PRODUCTION DE FEUILLARDS OU DE TOLES A CHAUD EN ACIER MICROALLIE
Publication
Application
Priority
- DE 10062919 A 20001216
- EP 0114829 W 20011215
Abstract (en)
[origin: US2004040633A1] The invention relates to a method for producing hot strip or hot plate, in which a microalloyed steel, which, apart from microalloying elements, comprises (in weight %) C: 0.05-0.12%; Si:0.2-0.5%; Mn:1.5-2.2 %; Al:0.02-0.05%; P:<=0.025%; S:<=0.01%; with the remainder being iron and unavoidable impurities, is cast to form a raw material such as slabs, blooms or thin slabs; in which the raw material is heated to a temperature of 1300-1350° C.; in which the heated raw material is rough rolled at a degree of deformation of 36% to 43%; in which the rough rolled raw material is thermomechanically hot rolled at a final rolling temperature which exceeds the Ac3 temperature so as to form a hot strip; in which the hot strip is cooled at a cooling rate of at least 15° C./s to a coiling temperature of at least 590° C. and at most 630° C. at which temperature the cooled hot strip is finally coiled. With such a method, hot strip which is of particularly high strength even at larger thicknesses can be produced economically.
IPC 1-7
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/04 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01)
CPC (source: EP US)
C21D 8/021 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0248410 A1 20020620; AT E293175 T1 20050415; DE 10062919 A1 20020627; DE 50105924 D1 20050519; EP 1453984 A1 20040908; EP 1453984 B1 20050413; EP 1453984 B8 20050727; ES 2240337 T3 20051016; US 2004040633 A1 20040304
DOCDB simple family (application)
EP 0114829 W 20011215; AT 01270630 T 20011215; DE 10062919 A 20001216; DE 50105924 T 20011215; EP 01270630 A 20011215; ES 01270630 T 20011215; US 39879503 A 20030408