Title (en)

Procedure for manufacturing of steel starting material by warm deforming

Title (de)

Verfahren zum Herstellen von Vormaterial aus Stahl durch Warmverformen

Title (fr)

Procédure de fabrication de la matière brute de l'acier par déformer ä chaud

Publication

EP 1780293 B2 20171108 (DE)

Application

EP 06022284 A 20061025

Priority

DE 102005052069 A 20051028

Abstract (en)

[origin: EP1780293A2] Production of an initial material by thermal deformation involves subjecting a manganese-, chromium-, molybdenum-, nickel- and boron-containing steel (I), of specific composition, to controlled cooling from the thermal deformation temperature to give a martensitic-bainitic structure. Production of an initial material by thermal deformation involves subjecting a steel (I) to controlled cooling from the thermal deformation temperature to give a martensitic-bainitic structure. (I) contains (by weight, apart from iron and smelting impurities) 0.08-0.25% carbon, up to 1% silicon, 0.5-2.5% manganese, up to 0.035% phosphorus, up to 0.055% sulfur, 0.1-1.5% chromium, 0.1-0.5% molybdenum, 0.2-1.5% nickel, up to 0.06% aluminum, 0.0010-0.0060% boron, up to 0.040% titanium, up to 0.04% vanadium, up to 0.04% niobium, up to 0.5% copper and up to 0.010% nitrogen.

IPC 8 full level

C21D 1/00 (2006.01); C21D 1/20 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01)

CPC (source: EP)

C21D 1/00 (2013.01); C21D 1/20 (2013.01); C21D 8/02 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01)

Citation (opposition)

Opponent :

• US 5919415 A 19990706 - PICHARD CLAUDE [FR]
• US 5762725 A 19980609 - PICHARD CLAUDE [FR], et al
• TALOR K.A. ET AL: "Accelerated Cooling of Rolled Steel", 1987, PERGAMON PRESS, NEW YORK, pages: 85 - 101
• "Abrazo 400 brochure", 1995, British Steel
• MANGANELLO S.J. ET AL: "Direct quenching and its effects on high-strength armor plate", INTERNATIONAL SYMPOSIUM ON LOW-CARBON STEELS FOR THE 90'S, 1993, pages 235 - 241
• "A 51 4/A51 4M-05- Standard specification for high yield strength quench and tempered alloy steel plate, suitable for welding", Oktober 2005
• CAHN R.W. ET AL: "Constitution and Properties of Steels", vol. 7, 1992, VCH, WEINHEIM, pages: 164 - 165

Designated contracting state (EPC)

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

DOCDB simple family (publication)

EP 1780293 A2 20070502; EP 1780293 A3 20070530; EP 1780293 B1 20130918; EP 1780293 B2 20171108; DE 102005052069 A1 20070503; DE 102005052069 B4 20150709; ES 2439900 T3 20140127; PL 1780293 T3 20140331

DOCDB simple family (application)

EP 06022284 A 20061025; DE 102005052069 A 20051028; ES 06022284 T 20061025; PL 06022284 T 20061025