Title (en)

MANUFACTURING METHOD FOR GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET

Title (de)

HERSTELLUNGSVERFAHREN FÜR EIN KORNORIENTIERTES ELEKTROMAGNETISCHES STAHLBLECH

Title (fr)

PROCÉDÉ DE FABRICATION D'UNE FEUILLE EN ACIER ÉLECTROMAGNÉTIQUE À GRAINS ORIENTÉS

Publication

EP 2537947 A4 20170726 (EN)

Application

EP 11744742 A 20110218

Priority

• JP 2010033921 A 20100218
• JP 2011053491 W 20110218

Abstract (en)

[origin: EP2537947A1] Hot rolling is performed on a steel with a predetermined composition containing Ti: 0.0020 mass% to 0.010 mass% and/or Cu: 0.010 mass% to 0.50 mass% to obtain a hot-rolled steel sheet. Annealing is performed on the hot-rolled steel sheet to obtain an annealed steel sheet. Cold rolling is performed on the annealed steel sheet to obtain a cold-rolled steel sheet. Decarburization annealing is performed on the cold-rolled steel sheet at a temperature of 800°C to 950°C to obtain a decarburization annealed steel sheet. Then, nitridation treatment is performed on the decarburization annealed steel sheet at 700°C to 850°C to obtain a nitrided steel sheet. Finish annealing is performed on the nitrided steel sheet.

IPC 8 full level

C21D 8/12 (2006.01); C21D 3/04 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/34 (2006.01); C23C 8/02 (2006.01); C23C 8/80 (2006.01); H01F 1/16 (2006.01)

CPC (source: EP KR US)

C21D 3/04 (2013.01 - EP KR US); C21D 8/12 (2013.01 - EP KR US); C21D 8/1255 (2013.01 - EP KR US); C21D 8/1272 (2013.01 - EP KR US); C21D 9/46 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/14 (2013.01 - EP KR US); C22C 38/16 (2013.01 - EP KR US); C22C 38/34 (2013.01 - EP KR US); C23C 8/02 (2013.01 - EP KR US); C23C 8/80 (2013.01 - EP KR US); H01F 1/16 (2013.01 - EP US)

Citation (search report)

• [X] EP 0326912 A2 19890809 - NIPPON STEEL CORP [JP]
• [X] US 3764407 A 19731009 - HIRANO H, et al
• [XA] US 4202711 A 19800513 - LITTMANN MARTIN F [US], et al
• [A] JP H08279408 A 19961022 - NIPPON STEEL CORP, et al
• [A] US 5288736 A 19940222 - SCHOEN JERRY W [US], et al
• [A] EP 0484904 A2 19920513 - NIPPON STEEL CORP [JP]
• [A] US 5186762 A 19930216 - USHIGAMI YOSHIYUKI [JP], et al
• [A] US 5667598 A 19970916 - OZAKI YOSHIHIRO [JP], et al
• [A] US 5049205 A 19910917 - TAKAHASHI NOBUYUKI [JP], et al
• [A] US 5759293 A 19980602 - TAKAHASHI NOBUYUKI [JP], et al
• [A] EP 0219611 A1 19870429 - NIPPON STEEL CORP [JP]
• [A] JP S5956522 A 19840402 - NIPPON STEEL CORP
• [A] JP 2009256713 A 20091105 - NIPPON STEEL CORP
• See references of WO 2011102456A1

Designated contracting state (EPC)

AL 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 RS SE SI SK SM TR

DOCDB simple family (publication)

EP 2537947 A1 20121226; EP 2537947 A4 20170726; EP 2537947 B1 20181219; BR 112012020741 A2 20160823; BR 112012020741 B1 20220719; CN 102762752 A 20121031; CN 102762752 B 20160413; JP 4943559 B2 20120530; JP WO2011102456 A1 20130617; KR 101389248 B1 20140424; KR 20120118504 A 20121026; KR 20130119516 A 20131031; PL 2537947 T3 20190531; US 2012312423 A1 20121213; WO 2011102456 A1 20110825

DOCDB simple family (application)

EP 11744742 A 20110218; BR 112012020741 A 20110218; CN 201180009920 A 20110218; JP 2011053491 W 20110218; JP 2011523633 A 20110218; KR 20127024187 A 20110218; KR 20137026864 A 20110218; PL 11744742 T 20110218; US 201113579684 A 20110218