EP 2566989 B1 20140226 - PROCESS FOR HOT ROLLING STEEL STRIPS AND HOT ROLLING TRAIN
Title (en)
PROCESS FOR HOT ROLLING STEEL STRIPS AND HOT ROLLING TRAIN
Title (de)
VERFAHREN ZUM WARMWALZEN VON STAHLBÄNDERN UND WARMWALZSTRASSE
Title (fr)
PROCÉDÉ DE LAMINAGE À CHAUD DE BANDES D'ACIER ET TRAIN DE LAMINAGE À CHAUD
Publication
Application
Priority
- AT 7542010 A 20100504
- EP 2011056086 W 20110418
Abstract (en)
[origin: WO2011138159A1] The invention relates to an apparatus and a process for hot rolling steel strips (3) in a plurality of successive roll stands (F1-F5), wherein the steel strips are finish-rolled to the end thickness in one or more roll stands firstly in the austenitic state and then, after liquid cooling, in the ferritic state. In order to ensure that the steel strip actually reaches the ferritic state after cooling, it is provided that the end thickness of the steel strip (3) is less than 3 mm, that the difference between the outlet temperature of the steel strip from the last roll stand (F3) before liquid cooling and the equilibrium austenite boundary temperature is set by the pilot control or regulation of the outlet temperature to no more than 70 K, preferably no more than 50 K, preferably less than 25 K, and that the liquid cooling takes place between two roll stands depending on the length (Lc) of a cooling section (1) by the application, in the cooling section and on both sides of the steel strip (3), of at least in each case a quantity of liquid Qu > 284/(Lc1.42) litres per minute and per metre of strip width, in particular Qu > 2*284/(Lc1.42) litres per minute and per metre of strip width, but not more than Qu = 7*284/(Lc1.42) litres per minute and per metre of strip width, preferably Qu 1.42) litres per minute and per metre of strip width.
IPC 8 full level
C21D 8/04 (2006.01); C21D 11/00 (2006.01)
CPC (source: EP KR)
B21B 1/26 (2013.01 - KR); B21B 37/74 (2013.01 - KR); C21D 8/02 (2013.01 - KR); C21D 8/0426 (2013.01 - EP); C21D 10/00 (2013.01 - KR); C21D 11/005 (2013.01 - EP); B21B 37/74 (2013.01 - EP); C21D 8/0226 (2013.01 - EP); C21D 9/46 (2013.01 - EP); C21D 9/48 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2011138159 A1 20111110; AT 509707 A4 20111115; AT 509707 B1 20111115; CN 102859009 A 20130102; CN 102859009 B 20140827; EP 2566989 A1 20130313; EP 2566989 B1 20140226; KR 101506442 B1 20150327; KR 20130045862 A 20130506; RU 2012151842 A 20140610; RU 2526644 C2 20140827
DOCDB simple family (application)
EP 2011056086 W 20110418; AT 7542010 A 20100504; CN 201180022294 A 20110418; EP 11715225 A 20110418; KR 20127031797 A 20110418; RU 2012151842 A 20110418