EP 1412543 A1 20040428 - METHOD FOR COOLING WORK PIECES ESPECIALLY SHAPE-ROLLED PRODUCTS FROM RAIL STEEL
Title (en)
METHOD FOR COOLING WORK PIECES ESPECIALLY SHAPE-ROLLED PRODUCTS FROM RAIL STEEL
Title (de)
VERFAHREN ZUR KÜHLUNG VON WERKSTÜCKEN INSBESONDERE VON PROFILWALZPRODUKTEN AUS SCHIENENSTÄHLEN
Title (fr)
PROCEDE DE REFROIDISSEMENT DE PIECES, EN PARTICULIER DE PRODUITS LAMINES PROFILES EN ACIER QUALITE RAIL
Publication
Application
Priority
- DE 10137596 A 20010801
- EP 0208271 W 20020725
Abstract (en)
[origin: WO03012151A1] The invention relates to a method for producing especially shape-rolled products from rail steels that have a finely perlitic and/or ferritic/perlitic structure after cooling. The inventive method is characterized by guiding the work piece through a cooling stretch that is composed of individual independent cooling modules (2a-e) having independently adjustable cooling parameters. Between said cooling modules (2a-e) intermediate zones (5a-e) are provided for relieving the stress of the structure, comprising means for determining the actual temperature (TACTUAL) of the respective work piece in said intermediate zones (5a-e). Depending on the respective actual temperature values (TACTUAL) of the work piece in an intermediate zone (5a-e) the specific cooling parameters, especially the cooling intensity, of the respective subsequent cooling module (2b-e) are controlled in order to safeguard a defined temperature of the work piece during the entire passage through the cooling stretch (1), the defined temperature (TDESIRED) of the work piece being above a critical temperature at which the bainitic portions of the structure are formed.
IPC 1-7
IPC 8 full level
B21B 45/02 (2006.01); C21D 1/00 (2006.01); C21D 1/02 (2006.01); C21D 9/00 (2006.01); C21D 9/04 (2006.01); C21D 11/00 (2006.01)
CPC (source: EP KR US)
C21D 9/04 (2013.01 - EP US); C21D 11/00 (2013.01 - KR); C21D 11/005 (2013.01 - EP US)
Citation (search report)
See references of WO 03012151A1
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)
WO 03012151 A1 20030213; AT E288503 T1 20050215; CN 1232661 C 20051221; CN 1537175 A 20041013; DE 10137596 A1 20030213; DE 50202183 D1 20050310; EP 1412543 A1 20040428; EP 1412543 B1 20050202; ES 2236592 T3 20050716; JP 2004537649 A 20041216; JP 4174423 B2 20081029; KR 100583301 B1 20060525; KR 20040015347 A 20040218; RU 2004105954 A 20050327; RU 2266966 C2 20051227; US 2004187974 A1 20040930; US 2008018027 A1 20080124; US 2010207305 A9 20100819; US 7854883 B2 20101221
DOCDB simple family (application)
EP 0208271 W 20020725; AT 02776916 T 20020725; CN 02815118 A 20020725; DE 10137596 A 20010801; DE 50202183 T 20020725; EP 02776916 A 20020725; ES 02776916 T 20020725; JP 2003517324 A 20020725; KR 20047000443 A 20020725; RU 2004105954 A 20020725; US 48528604 A 20040126; US 88063507 A 20070723