Title:
METHOD FOR IMPROVING CORE LOSS IN GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET
Document Type and Number:
Japanese Patent JP2012180543
Kind Code:
A
Abstract:
To provide a method for homogenizing an effect of magnetic domain refinement across a width direction of a steel sheet when irradiating an electron beam to a wide grain-oriented electromagnetic steel sheet or when downsizing an electron beam irradiation unit.
When continuously irradiating the electron beam to a moving grain-oriented electromagnetic steel sheet in its width direction, a converging current of the electron beam is adjusted according to an incidence angle of the electron beam to the steel sheet surface so as to change the area of a beam spot, thereby homogenizing the energy density across the width direction of the beam spot.
Inventors:
OKABE SEIJI
YAMAGUCHI HIROSHI
OMURA TAKESHI
TAKAGI SHIGEHIRO
YAMAGUCHI HIROSHI
OMURA TAKESHI
TAKAGI SHIGEHIRO
Application Number:
JP2011043022A
Publication Date:
September 20, 2012
Filing Date:
February 28, 2011
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
C21D8/12; B23K15/00; C22C38/00; C22C38/60; H01F1/16
Domestic Patent References:
| JPH05128992A | 1993-05-25 | |||
| JPH04264344A | 1992-09-21 | |||
| JPH0439852A | 1992-02-10 | |||
| JPH0439851A | 1992-02-10 |
Attorney, Agent or Firm:
川原 敬祐
杉村 憲司
来間 清志
杉村 憲司
来間 清志
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