EP 2757165 A1 20140723 - METHOD OF PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING EXCELLENT IRON LOSS PROPERTIES
Title (en)
METHOD OF PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING EXCELLENT IRON LOSS PROPERTIES
Title (de)
VERFAHREN ZUR HERSTELLUNG VON KORNORIENTIERTEM ELEKTROMAGNETISCHEM STAHLBLECH MIT HERVORRAGENDEN KERNVERLUSTEIGENSCHAFTEN
Title (fr)
PROCÉDÉ DE PRODUCTION D'UNE TÔLE D'ACIER ÉLECTROMAGNÉTIQUE À GRAINS ORIENTÉS PRÉSENTANT D'EXCELLENTES CARACTÉRISTIQUES DE PERTE DE COEUR
Publication
Application
Priority
- JP 2011203349 A 20110916
- JP 2012073608 W 20120914
Abstract (en)
In the production of a grain-oriented electrical steel sheet by hot rolling a steel slab comprising C: 0.001ˆ¼0.10 mass%, Si:1.0ˆ¼5.0 mass%, Mn:0.01ˆ¼0.5 mass%, sol. Al: 0.003ˆ¼0.050 mass%, N: 0.0010ˆ¼0.020 mass%, one or two selected from S and Se: 0.005ˆ¼0.040 mass% in total, cold rolling, primary recrystallization annealing, and final annealing, a heating rate S1 between a temperature T1 (°C): 500+2 x (NB - NA) and a temperature T2 (°C): 600 +2 x (NB - NA) in a heating process of the primary recrystallization annealing is set to not less than 80°C/sec, and an average heating rate S2 from the temperature T2 to 750°C is set to 0.1ˆ¼0.7 times of S1, whereby a grain-oriented electrical steel sheet having a low iron loss over a full length of a product coil is obtained. In the equations, NA represents N amount (massppm) precipitated after the final cold rolling and NB represents N amount (massppm) precipitated after the primary recrystallization annealing.
IPC 8 full level
C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/60 (2006.01); H01F 1/16 (2006.01)
CPC (source: EP US)
C21D 8/1261 (2013.01 - US); C21D 8/1272 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/008 (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 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/16 (2013.01 - EP US); C22C 38/34 (2013.01 - EP US); C22C 38/60 (2013.01 - EP US); H01F 1/16 (2013.01 - EP US); C21D 8/1222 (2013.01 - EP US); C21D 8/1233 (2013.01 - EP US); C21D 8/1266 (2013.01 - EP US); C21D 2201/05 (2013.01 - EP US)
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 2757165 A1 20140723; EP 2757165 A4 20150701; EP 2757165 B1 20170215; CN 103781920 A 20140507; CN 103781920 B 20150520; JP 2013064178 A 20130411; JP 5434999 B2 20140305; KR 101600724 B1 20160307; KR 20140044928 A 20140415; RU 2014115200 A 20151027; RU 2572947 C2 20160120; US 2014338794 A1 20141120; WO 2013039193 A1 20130321
DOCDB simple family (application)
EP 12832398 A 20120914; CN 201280043648 A 20120914; JP 2011203349 A 20110916; JP 2012073608 W 20120914; KR 20147005984 A 20120914; RU 2014115200 A 20120914; US 201214344805 A 20120914