Title:
GRAIN ORIENTED SILICON STEEL SHEET WITH LOW IRON LOSS
Document Type and Number:
Japanese Patent JP3726289
Kind Code:
B2
Abstract:
PURPOSE: To produce a grain oriented silicon steel sheet free from deterioration due to stress relief annealing and usable for both laminated core and wound core by providing the surface of ferrite with linear grooves and specifying a crystalline structure from the bottom part of the linear grooves.
CONSTITUTION: This steel sheet has a structure having linear grooves stretching in a direction nearly orthogonal to the rolling direction of steel sheet and also having continuous crystalline grain boundaries or fine crystalline grain regions of ≤1mm grain size from the bottom of the linear grooves to the other ferrite surface in a sheet thickness direction. It is more desirable that the linear grooves have 30-300μm width, 10-70μm depth, and 1-30mm spacing in a rolling direction and further have ≤30° angle from the direction perpendicular to rolling direction. By this method, the grain oriented silicon steel sheet, having no core loss caused by stress relief annealing as well as having low care loss, can be obtained.
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Inventors:
Keiji Sato
Kazuhiro Suzuki
Hiroro Toda
Michio Komatsubara
Kazuhiro Suzuki
Hiroro Toda
Michio Komatsubara
Application Number:
JP6318494A
Publication Date:
December 14, 2005
Filing Date:
March 31, 1994
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C21D8/12; C22C38/00; C22C38/60; H01F1/147; H01F1/16; (IPC1-7): C21D8/12; C22C38/00; C22C38/60; H01F1/16
Domestic Patent References:
| JP3138318A | ||||
| JP1198429A |
Attorney, Agent or Firm:
Kosaku Sugimura
Kazuaki Takami
Hiroshi Tokunaga
Yoshiyuki Iwasa
Shiro Fujitani
Kiyoshi Kuruma
Kazuyuki Tomita
Kazuaki Takami
Hiroshi Tokunaga
Yoshiyuki Iwasa
Shiro Fujitani
Kiyoshi Kuruma
Kazuyuki Tomita