EP 1725347 A1 20061129 - PROCESS FOR PRODUCING A LIGHTWEIGHT STRUCTURAL STEEL WITH A HIGH MANGANESE CONTENT
Title (en)
PROCESS FOR PRODUCING A LIGHTWEIGHT STRUCTURAL STEEL WITH A HIGH MANGANESE CONTENT
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES LEICHTBAUSTAHLS MIT EINEM HOHE MANGAN-GEHALT
Title (fr)
PROCEDE DE PRODUCTION D'UN ACIER POUR CONSTRUCTION LEGERE A HAUTE TENEUR EN MANGANESE
Publication
Application
Priority
- EP 2006001954 W 20060303
- DE 102005010243 A 20050305
Abstract (en)
[origin: CA2560681A1] For various reasons, in the prior art it is considered difficult or impossib le to produce steels with high manganese (Mn), aluminium (AI) and silicon (Si) contents and with TWIP (Twinning Induced Plasticity) properties by continuou s casting. The reasons cited include low strength of the strand shell during solidification on account of extensive micro-segregation of Mn, high strengt h at lower temperatures, reactions of the aluminium in the steel with the casting powder, macro-segregations, depletion of the alloying elements in th e surface region and oxidation of the grain boundaries during the reheating of slabs in the pusher furnace. Therefore, the invention proposes that, by successive process steps, lightweight structural steel with a predetermined chemical composition of up to 27% Mn, 1 to 6% AI, 1 to 6% Si, < 0.8% C, remainder Fe and accompanying elements, be cast on a thin-slab casting machi ne (1 ) (d <= 120 mm) using suitable casting powders, then immediately after the solidification slabs (3) be severed from the endless strand (2) and that temperature equalization be carried out during continuous passage through an intermediate furnace (4) and then the slab (3) be directly hot-rolled withou t intervening cooling.
IPC 8 full level
B21B 1/46 (2006.01); B22D 11/00 (2006.01); C21D 8/02 (2006.01); C22C 38/00 (2006.01)
CPC (source: EP KR US)
B21B 1/466 (2013.01 - EP KR US); B21B 3/02 (2013.01 - EP KR US); B22D 11/111 (2013.01 - EP KR US); B22D 11/1213 (2013.01 - EP KR US); B22D 11/142 (2013.01 - EP KR US); C21D 6/00 (2013.01 - EP KR US); C21D 6/005 (2013.01 - EP KR US); C21D 8/021 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C21D 8/0215 (2013.01 - EP US)
Citation (search report)
See references of WO 2006094718A1
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
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
DE 102005010243 A1 20060907; CA 2560681 A1 20060914; CN 101160183 A 20080409; CN 101160183 B 20110706; EP 1725347 A1 20061129; EP 1725347 B1 20121226; JP 2008531292 A 20080814; JP 4688890 B2 20110525; KR 101153735 B1 20120608; KR 20070108440 A 20071112; RU 2006136036 A 20080510; RU 2335358 C2 20081010; TW 200700566 A 20070101; UA 80237 C2 20070827; US 2008164003 A1 20080710; WO 2006094718 A1 20060914; ZA 200607920 B 20080430
DOCDB simple family (application)
DE 102005010243 A 20050305; CA 2560681 A 20060303; CN 200680007190 A 20060303; EP 06723198 A 20060303; EP 2006001954 W 20060303; JP 2007557433 A 20060303; KR 20067018434 A 20060908; RU 2006136036 A 20060303; TW 95107128 A 20060303; UA A200611050 A 20060303; US 66653506 A 20060303; ZA 200607920 A 20060919