Title (en)

HIGH MANGANESE NITROGEN-CONTAINING STEEL SHEET HAVING HIGH STRENGTH AND HIGH DUCTILITY, AND METHOD FOR MANUFACTURING SAME

Title (de)

STAHLBLECH MIT HOHEM MANGAN- UND STICKSTOFFANTEIL SOWIE HOHER FESTIGKEIT UND LEITFÄHIGKEIT UND HERSTELLUNGSVERFAHREN DAFÜR

Title (fr)

TÔLE D'ACIER CONTENANT DE L'AZOTE À HAUTE TENEUR EN MANGANÈSE PRÉSENTANT UNE RÉSISTANCE ET UNE DUCTILITÉ ÉLEVÉES, ET SON PROCÉDÉ DE FABRICATION

Publication

EP 2431492 A4 20140122 (EN)

Application

EP 10769913 A 20100427

Priority

• KR 2010002625 W 20100427
• KR 20090036963 A 20090428
• KR 20100026584 A 20100325

Abstract (en)

[origin: EP2431492A2] Provided is a high manganese nitrogen-containing steel sheet. The high manganese nitrogen-containing steel sheet according to the present invention comprises 0.5 to 1.0 wt % of carbon, 10 to 20 wt % of manganese, 0.02 to 0.3 wt % of nitrogen, with a remainder of Fe and unavoidable impurities. The high manganese nitrogen-containing steel sheet according to the present invention produces an austenite phase at room temperature, in which the stacking fault energy is effectively controlled by adding chrome and nitrogen. Accordingly, the high manganese nitrogen-containing steel sheet of the present invention produces a mechanical twin during the plastic deformation of the steel sheet, thereby increasing the work hardening rate, tensile strength, and workability.

IPC 8 full level

C22C 38/04 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/34 (2006.01); C22C 38/38 (2006.01)

CPC (source: EP US)

C21D 6/005 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/34 (2013.01 - EP US); C22C 38/38 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP US)

Citation (search report)

• [XY] US 2008035248 A1 20080214 - CUGY PHILIPPE [FR], et al
• [Y] US 4855105 A 19890808 - SVIDUNOVICH NIKOLAI A [SU], et al
• [XI] GB 2024862 A 19800116 - KOBE STEEL LTD
• [XAI] GB 2040999 A 19800903 - NIPPON KOKAN KK
• [XI] JP H0657379 A 19940301 - NIPPON STEEL CORP
• [XAI] JP H0313544 A 19910122 - NIPPON STEEL CORP
• [A] JP S63235428 A 19880930 - NIPPON MINING CO
• [A] WO 9313233 A1 19930708 - PO HANG IRON & STEEL [KR], et al
• [A] JP S6036647 A 19850225 - KAWASAKI STEEL CO
• [A] JP H07126809 A 19950516 - KOBE STEEL LTD
• [A] JP H04154938 A 19920527 - NIPPON STEEL CORP
• [A] FR 2557140 A1 19850628 - KOBE STEEL LTD [JP]
• See references of WO 2010126268A2

Designated contracting state (EPC)

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 SE SI SK SM TR

DOCDB simple family (publication)

EP 2431492 A2 20120321; EP 2431492 A4 20140122; EP 2431492 B1 20150930; CN 102439188 A 20120502; JP 2012525500 A 20121022; JP 5437482 B2 20140312; US 2012045358 A1 20120223; WO 2010126268 A2 20101104; WO 2010126268 A3 20110303

DOCDB simple family (application)

EP 10769913 A 20100427; CN 201080019097 A 20100427; JP 2012508394 A 20100427; KR 2010002625 W 20100427; US 201013318129 A 20100427