Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2015/040799
Kind Code:
A1
Abstract:
A grain-oriented electromagnetic steel sheet having a forsterite base film and an insulating tension coating on the surface thereof, wherein if magnetic domain refinement processing is performed by using a laser beam, a plasma flame, or electron beam irradiation, a sufficient iron loss reduction effect is achieved within a range in which film peeling does not occur, said effect being achieved by: the relationships FX(Ti)/FX(Al) ≥ 0.15 and FX(Ti)/FX(Fe) ≥ 0.004 being satisfied if FX(Ti) is Ti strength, FX(Al) is Al strength, and FX(Fe) is Fe strength when the surface has been quantitatively analysed by X-ray fluorescence analysis; furthermore, the grain boundary frequency of secondary recrystallised grains in the direction perpendicular to rolling being 20 boundaries/100 mm or less; and moreover, the relationship t(Fo)/t(C) ≥ 0.3 being satisfied if t(Fo) is the average thickness of the forsterite base film and t(C) is the thickness of the insulating tension coating.

More Like This:
JPH03261103CORROSION RESISTANT RARE EARTH-IRON MAGNET AND CORROSION RESISTANT RARE EARTH-IRON BOND MAGNET
JP6007945A manufacturing method of a nano composite magnet
WO/2007/148475STEEL FOR FORGING, PROCESS FOR PRODUCING THE SAME, AND FORGED ARTICLE
Inventors:
SENDA KUNIHIRO (JP)
TAKAJO SHIGEHIRO (JP)
OKUBO TOMOYUKI (JP)
Application Number:
PCT/JP2014/004382
Publication Date:
March 26, 2015
Filing Date:
August 26, 2014
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C38/00; B23K15/00; C21D8/12; C21D9/46; C22C38/60; C23C22/00; C23C22/33; H01F1/16
Foreign References:
JP2012092409A2012-05-17
JP2002194445A2002-07-10
JP2012036447A2012-02-23
JP2012214902A2012-11-08
JPS572252B21982-01-14
JP2006117964A2006-05-11
JPH10204533A1998-08-04
JPH11279645A1999-10-12
JP2984195B21999-11-29
JP3456352B22003-10-14
JP2012031512A2012-02-16
JP2012031518A2012-02-16
Other References:
See also references of EP 3048180A4
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREFOR

Next Patent: FLUID-PRESSURE DRIVE DEVICE