Title:
GRAIN-ORIENTED MAGNETIC STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2011/013858
Kind Code:
A1
Abstract:
Provided is a magnetic steel sheet which comprises components including, in terms of mass%, up to 0.005% C, 1.0-8.0% Si, and 0.005-1.0% Mn and further including one or more elements selected from Nb, Ta, V, and Zr in a total amount of 10-50 ppm, with the remainder being Fe and incidental impurities, wherein at least 10% of the Nb, Ta, V, and Zr are present as a precipitate, the precipitate has a diameter (equivalent-circle diameter) of 0.02-3 µm on average, and the secondary recrystallized grains in the steel sheet have an average grain diameter of 5 mm or larger. Thus, the magnetic steel sheet, even when for use in large transformers having a size of several meters, can be inhibited from deteriorating in magnetic properties when sheared.
Inventors:
IMAMURA TAKESHI (JP)
SHINGAKI YUKIHIRO (JP)
MURAKI MINEO (JP)
SHINGAKI YUKIHIRO (JP)
MURAKI MINEO (JP)
Application Number:
PCT/JP2010/063343
Publication Date:
February 03, 2011
Filing Date:
July 30, 2010
Export Citation:
Assignee:
JFE STEEL CORP (JP)
IMAMURA TAKESHI (JP)
SHINGAKI YUKIHIRO (JP)
MURAKI MINEO (JP)
IMAMURA TAKESHI (JP)
SHINGAKI YUKIHIRO (JP)
MURAKI MINEO (JP)
International Classes:
C22C38/00; B21B3/02; C22C38/14; C22C38/60; H01F1/16; C21D8/12; C21D9/46
Foreign References:
| JPH10110218A | 1998-04-28 | |||
| JPS5224116A | 1977-02-23 | |||
| JP2005023393A | 2005-01-27 | |||
| JPH08138924A | 1996-05-31 | |||
| JPH0415644B2 | 1992-03-18 | |||
| JPS5113469B2 | 1976-04-28 | |||
| JP2000129356A | 2000-05-09 |
Other References:
See also references of EP 2460902A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)
Ken-ichiro Ochiai (JP)
Download PDF: