Title (en)

METHOD FOR PRODUCING A HOT ROLLED STRIP FROM AUSTENITIC RUST-RESISTANT STEELS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON WARMBAND AUS AUSTENITISCHEN NICHTROSTENDEN STÄHLEN

Title (fr)

PROCEDE DE PRODUCTION DE FEUILLARD LAMINE A CHAUD A PARTIR D'ACIERS AUSTENITIQUES INOXYDABLES

Publication

EP 1469954 B2 20090311 (DE)

Application

EP 03702404 A 20030109

Priority

• DE 10203711 A 20020131
• EP 0300119 W 20030109

Abstract (en)

[origin: US7922840B2] A method for producing hot-rolled strip from austenitic stainless steels. In a first step, a cast product is subjected to a rolling operation in a rolling mill with a finishing train, and, in a second step, a heat treatment is carried out to prevent susceptibility to corrosion, especially intergranular corrosion due to chromium carbide precipitation. To establish the final rolling temperature (Twe), a run-in temperature (Tein) of the cast product into the finishing train of the rolling mill that is above 1,150° C., and preferably above 1,200° C., is established by a multistage heating process, especially a two-stage heating process, which comprises a preheating stage and an intensive heating stage, and the heat treatment is carried out by directly utilizing the rolling heat.

IPC 8 full level

B21B 1/26 (2006.01); B21B 1/46 (2006.01); B21B 3/02 (2006.01); B21B 45/00 (2006.01); B21B 45/08 (2006.01); C21D 8/00 (2006.01); C21D 8/02 (2006.01); C21D 9/00 (2006.01); B21B 1/18 (2006.01); B21B 37/74 (2006.01); C21D 6/00 (2006.01)

CPC (source: EP KR US)

B21B 1/26 (2013.01 - EP KR US); B21B 1/466 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); B21B 1/18 (2013.01 - EP US); B21B 3/02 (2013.01 - EP US); B21B 37/74 (2013.01 - EP US); B21B 45/004 (2013.01 - EP US); C21D 6/004 (2013.01 - EP US); C21D 8/021 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US)

Citation (opposition)

Opponent :

• US 5611232 A 19970318 - ROHDE WOLFGANG [DE], et al
• EP 0610028 B1 20000503 - HITACHI LTD [JP]
• NATIONAL ASSOCIATION OF CORROSION ENGINEERS: "Corrosion", CORROSION, vol. 46, 1990 - 1990, USA, pages 698 - 709
• GOSIO G.; MEYER P.: "I.S.P.an innovative technology based on thin slab concept for production of hot rolled strips", 1ST EUROPEAN CONFERENCE ON CONTINUOUS CASTING, 23 September 1991 (1991-09-23) - 25 September 1991 (1991-09-25), FLORENCE, ITALY, pages 2.31 - 2.51(FIGUREN 1 BIS 48)
• SCHÖNBERG J.: "Current status of the ISP technology and new developments", MPT, vol. 1, 1997 - 1997, AACHEN
• EHRENBERG H.-J.: "Casting and cast-rolling of thin slabs at the Mannesmannröhren-Werke AG", MPT, vol. 3, 1989 - 1989, DUISBURG, pages 52 - 58
• "In-line Strip Production Product Information", 25 January 1999, MANNESMANN DEMAG ENGINEERING, DUISBURG,GERMANY, article "ISP Plants"

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

DOCDB simple family (publication)

WO 03064069 A1 20030807; AT E320866 T1 20060415; CA 2471481 A1 20030807; CA 2471481 C 20100817; CN 1292847 C 20070103; CN 1625447 A 20050608; DE 10203711 A1 20030814; DE 50302735 D1 20060511; EP 1469954 A1 20041027; EP 1469954 B1 20060322; EP 1469954 B2 20090311; ES 2261914 T3 20061116; ES 2261914 T5 20090525; JP 2005525239 A 20050825; JP 4860110 B2 20120125; KR 100971902 B1 20100723; KR 20040073597 A 20040819; RU 2004126316 A 20050610; RU 2302304 C2 20070710; TW 200302143 A 20030801; TW I283613 B 20070711; UA 78281 C2 20070315; US 2005072499 A1 20050407; US 2008000559 A1 20080103; US 2009260728 A1 20091022; US 7854884 B2 20101221; US 7922840 B2 20110412; ZA 200404829 B 20050223

DOCDB simple family (application)

EP 0300119 W 20030109; AT 03702404 T 20030109; CA 2471481 A 20030109; CN 03803129 A 20030109; DE 10203711 A 20020131; DE 50302735 T 20030109; EP 03702404 A 20030109; ES 03702404 T 20030109; JP 2003563748 A 20030109; KR 20047011574 A 20030109; RU 2004126316 A 20030109; TW 91134441 A 20021127; UA 20040807174 A 20030109; US 45431809 A 20090515; US 50310004 A 20041119; US 88168807 A 20070727; ZA 200404829 A 20040618