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Title:
GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING LOW CORE LOSS AND HIGH MAGNETIC FLUX DENSITY
Document Type and Number:
WIPO Patent Application WO/2011/068311
Kind Code:
A2
Abstract:
The present invention relates to a grain-oriented electrical steel sheet on which a plurality of linear grooves are formed on a surface to miniaturize magnetic domains. Given that a groove depth which reaches the bottom portion from the surface of the steel sheet is "H", and that a horizontal length of a bottom surface of which depth from the surface of the steel sheet is over 4/5 of the groove depth is "W", the groove depth and the horizontal length of the bottom surface satisfy the relation "0.1≤2H/W≤2" in the grain-oriented electrical steel sheet having low core loss and high magnetic flux density. Thus, core loss of the grain-oriented electrical steel sheet is improved by 10% to 20% through the miniaturization of the magnetic domains, and it is also possible to manufacture the grain-oriented electrical steel sheet which has extremely excellent magnetic characteristics because the magnetic flux density is not deteriorated even after stress relief annealing.

Inventors:
KWON OH-YEOUL (KR)
CHA SANG-YUN (KR)
HAN CHAN-HEE (KR)
KIM JAE-KWAN (KR)
Application Number:
PCT/KR2010/007788
Publication Date:
June 09, 2011
Filing Date:
November 05, 2010
Export Citation:
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Assignee:
POSCO (KR)
KWON OH-YEOUL (KR)
CHA SANG-YUN (KR)
HAN CHAN-HEE (KR)
KIM JAE-KWAN (KR)
International Classes:
C21D8/12
Domestic Patent References:
WO1997024466A11997-07-10
Foreign References:
KR20080010454A2008-01-30
JPH07268474A1995-10-17
KR100779580B12007-11-28
Attorney, Agent or Firm:
HONG, SUNG-CHUL (KR)
홍성철 (KR)
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