Title:
GRAIN ORIENTED SILICON STEEL SHEET HAVING HIGH MAGNETIC PERMEABILITY, AND METHOD FOR INCREASING MAGNETIC PERMEABILITY OF GRAIN ORIENTED SILICON STEEL SHEET
Document Type and Number:
Japanese Patent JP2004197126
Kind Code:
A
Abstract:
To increase the magnetic permeability of a grain oriented silicon steel sheet, that is, to improve performances of a mashield or various sensors.
The grain oriented silicon steel sheet is irradiated with laser beam so as to introduce strain whose degree is removed with an annealing at about 800°C, and the magnetic permeability is increased. The input energy is smaller than the laser beam irradiation condition for reducing a core loss known as usual.
Inventors:
FUJIKURA MASAHIRO
KUBOTA TAKESHI
KUBOTA TAKESHI
Application Number:
JP2002364489A
Publication Date:
July 15, 2004
Filing Date:
December 16, 2002
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
B21B3/02; C21D8/12; (IPC1-7): C21D8/12; B21B3/02
Attorney, Agent or Firm:
Hiroaki Tamura
Tomoyuki Yabuki
Tomoyuki Yabuki