Title:
磁気特性の優れた方向性電磁鋼板とその製造方法
Document Type and Number:
Japanese Patent JP4510757
Kind Code:
B2
Abstract:
The present invention provides a grain-oriented electrical steel sheet with an extremely low core loss by scanning by a small focused laser beam spot and a method of production of the same, that is, a grain-oriented electrical steel sheet improved in electrical characteristics by scanning by a continuous wave fiber laser of the TEM00 mode with a wavelength lambda of 1.07≤ lambda ≤2.10 mu m substantially perpendicular to the steel sheet rolling direction and at substantially constant spacing and a method of production of the same, wherein a rolling direction focused spot diameter d (mm) of the irradiated beam, a linear scan rate V (mm/s) of the laser beam, an average output P (W) of the laser, a width of the formed laser scribing traces or with of the electrical domains Wl (mm), and a rolling direction Pl (mm) of the laser scribing traces are in the following ranges: 0 0.001≤P/V≤0.012 0 1.5≤Pl≤11.0
Inventors:
Tatsuhiko Sakai
Hideyuki Hamamura
Naoya Hamada
Hideyuki Hamamura
Naoya Hamada
Application Number:
JP2005503646A
Publication Date:
July 28, 2010
Filing Date:
March 05, 2004
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C21D8/12; B23K26/00; B23K26/082; H01F1/16; H01F41/02; H01F3/02; H01S3/067
Domestic Patent References:
| JP3069968B2 | 2000-07-24 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Masaya Nishiyama
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Masaya Nishiyama