EP 2508629 A4 20161130 - METHOD FOR MANUFACTURING NON-ORIENTED SILICON STEEL WITH HIGH-MAGNETIC INDUCTION
Title (en)
METHOD FOR MANUFACTURING NON-ORIENTED SILICON STEEL WITH HIGH-MAGNETIC INDUCTION
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES NICHT AUSGERICHTETEN SILICIUMSTAHLS MIT HOHER MAGNETISCHER INDUKTION
Title (fr)
PROCÉDÉ DE FABRICATION D'ACIER AU SILICIUM NON ORIENTÉ AVEC UNE FORTE INDUCTION MAGNÉTIQUE
Publication
Application
Priority
- CN 201010517872 A 20101025
- CN 2011072775 W 20110414
Abstract (en)
[origin: EP2508629A1] Abstract: A manufacture process of non-oriented silicon Steel with high magnetic induction comprising the procedures: 1) smelting and casting: the steel's chemical compositions by weight percent: Si 0.1~1%, Al 0.005~1.0%, C ‰¤ 0.004%, Mn = 0.10~1.50%, P ‰¤ 0.2%, , S ‰¤0.005%, N ‰¤0.002, Nb+V+Ti ‰¤0.006%, and the rest is Fe; molten steel is smelted and secondary refined and then casted into a billet; 2) hot-rolling: the billet is heated to 1150~1200°C, and then hot-rolled into a plate at finish-rolling temperature 830~900 °C , at a temperature ‰¥ 570°C, and is coiled; 3) flattening: the plate is cold-rolled at compression ratio 2~5%; 4) normalization: the plate is normalized at temperature not below 950°C for 30~180s; 5) pickling and cold-rolling: the normalized plate is pickled, and then is successively cold-rolled several times at total compression ratio 70~80% into a sheet with thickness of finished product; 6) finish-annealing: the cold-rolled sheet is quickly heated to 800~1000 °C at temperature rise rate ‰¥ 100°C/s, and soaked for 5~60s, thereafter, cooled slowly to 600~750C, then left to cool naturally. The manufacture process can raise magnetic induction of non-oriented silicon Steel by at least 200 Gauss without increasing iron loss.
IPC 8 full level
C21D 8/12 (2006.01); C21D 1/00 (2006.01); C21D 6/00 (2006.01); C21D 8/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); H01F 1/16 (2006.01)
CPC (source: EP KR US)
B21B 1/00 (2013.01 - KR); B22D 11/00 (2013.01 - KR); C21D 1/00 (2013.01 - EP KR US); C21D 6/008 (2013.01 - EP US); C21D 8/00 (2013.01 - EP US); C22C 38/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/004 (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 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); H01F 1/16 (2013.01 - EP US)
Citation (search report)
- [I] JP H06279858 A 19941004 - NIPPON KOKAN KK
- [A] JP H06228645 A 19940816 - SUMITOMO METAL IND
- [A] JP H10140242 A 19980526 - NIPPON KOKAN KK
- [A] JP 2009167480 A 20090730 - JFE STEEL CORP
- [A] US 6406558 B1 20020618 - KUROSAWA MITSUMASA [JP], et al
- See references of WO 2012055215A1
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 2508629 A1 20121010; EP 2508629 A4 20161130; CN 102453837 A 20120516; CN 102453837 B 20130717; JP 2013513724 A 20130422; KR 101404101 B1 20140609; KR 20120086343 A 20120802; MX 2012006680 A 20121015; RU 2012124187 A 20131220; RU 2527827 C2 20140910; US 2012285584 A1 20121115; WO 2012055215 A1 20120503
DOCDB simple family (application)
EP 11835489 A 20110414; CN 201010517872 A 20101025; CN 2011072775 W 20110414; JP 2012542352 A 20110414; KR 20127015086 A 20110414; MX 2012006680 A 20110414; RU 2012124187 A 20110414; US 201213492984 A 20120611