Global Patent Index - EP 2278034 A4

EP 2278034 A4 20170125 - HIGH-STRENGTH NON-ORIENTED MAGNETIC STEEL SHEET AND PROCESS FOR PRODUCING THE HIGH-STRENGTH NON-ORIENTED MAGNETIC STEEL SHEET

Title (en)

HIGH-STRENGTH NON-ORIENTED MAGNETIC STEEL SHEET AND PROCESS FOR PRODUCING THE HIGH-STRENGTH NON-ORIENTED MAGNETIC STEEL SHEET

Title (de)

HOCHFESTES NICHTORIENTIERTES MAGNETISCHES STAHLBLECH UND VERFAHREN ZUR HERSTELLUNG DES HOCHFESTEN NICHTORIENTIERTEN MAGNETISCHEN STAHLBLECHS

Title (fr)

TÔLE D'ACIER MAGNÉTIQUE NON ORIENTÉE À HAUTE RÉSISTANCE ET PROCÉDÉ DE FABRICATION DE LA TÔLE D'ACIER MAGNÉTIQUE NON ORIENTÉE À HAUTE RÉSISTANCE

Publication

EP 2278034 A4 20170125 (EN)

Application

EP 09732579 A 20090413

Priority

  • JP 2009057453 W 20090413
  • JP 2008104940 A 20080414

Abstract (en)

[origin: EP2278034A1] A high-strength non-oriented electrical steel sheet contains: by mass%, C: not less than 0.002% nor more than 0.05%; Si: not less than 2.0% nor more than 4.0%; Mn: not less than 0.05% nor more than 1.0%; N: not less than 0.002% nor more than 0.05%; and Cu: not less than 0.5% nor more than 3.0%. An Al content is 3.0% or less, and when a Nb content (%) is set to [Nb], a Zr content (%) is set to [Zr], a Ti content (%) is set to [Ti], a V content (%) is set to [V], a C content (%) is set to [C], and an N content (%) is set to [N], Formula (1) and Formula (2) are satisfied. A balance is composed of Fe and inevitable impurities, a recrystallization area ratio is 50% or more, yield stress at a tensile test is 700 MPa or more, fracture elongation is 10% or more, and an eddy current loss We 10/400 (W/kg) satisfies Formula (3) in relation to a sheet thickness t (mm) of the steel sheet. 2.0 × 10 - 4 ‰¦ Nb / 93 + Zr / 91 + Ti / 48 + V / 51 1.0 × 10 - 3 ‰¦ C / 12 + N / 14 - Nb / 93 + Zr / 91 + Ti / 48 + V / 51 ‰¦ 3.0 × 10 - 3 We 10 / 400 ‰¦ 70 × t 2

IPC 8 full level

C22C 38/00 (2006.01); C21D 8/12 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); H01F 1/147 (2006.01); H01F 1/16 (2006.01)

CPC (source: EP KR US)

C21D 8/1222 (2013.01 - EP KR US); C21D 8/1272 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP KR US); C22C 38/002 (2013.01 - EP US); C22C 38/004 (2013.01 - EP KR US); C22C 38/008 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP KR US); C22C 38/14 (2013.01 - EP KR US); C22C 38/16 (2013.01 - EP KR US); H01F 1/147 (2013.01 - KR); H01F 1/16 (2013.01 - EP KR US); C21D 2201/05 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP KR US); H01F 1/147 (2013.01 - EP US)

Citation (search report)

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 TR

DOCDB simple family (publication)

EP 2278034 A1 20110126; EP 2278034 A4 20170125; EP 2278034 B1 20200212; BR PI0910984 A2 20160105; BR PI0910984 B1 20180605; BR PI0910984 B8 20180925; CN 102007226 A 20110406; CN 102007226 B 20131106; JP 4659135 B2 20110330; JP WO2009128428 A1 20110804; KR 20100122116 A 20101119; PL 2278034 T3 20200629; TW 200946695 A 20091116; TW I404806 B 20130811; US 2011056592 A1 20110310; WO 2009128428 A1 20091022

DOCDB simple family (application)

EP 09732579 A 20090413; BR PI0910984 A 20090413; CN 200980113090 A 20090413; JP 2009057453 W 20090413; JP 2010508206 A 20090413; KR 20107022839 A 20090413; PL 09732579 T 20090413; TW 98112291 A 20090414; US 92277209 A 20090413