发明名称 |
GRAIN-ORIENTED MAGNETIC STEEL SHEET AND PROCESS FOR PRODUCING SAME |
摘要 |
Provided in accordance with the present invention is a grain-oriented magnetic steel sheet which has a thickness of 0.30 mm or less, linear grooves formed therein at a rolling-direction interval in the range of 2-10 mm, a depth of the linear grooves of 10 µm or more, and a forsterite coating film thickness on the bottom of the linear grooves of 0.3 µm or more, and in which the rolling-direction tension imparted to the steel sheet by the forsterite coating film and by the tension coating is 10.0 MPa or more in total, and the proportion of the eddy-current loss in the iron loss (W17/50) of the steel sheet to which an alternating field of 1.7 T and 50 Hz is applied in the rolling direction is 65% or less. Thus, the base steel having linear grooves for magnetic-domain refinement is further reduced in iron loss. When used to assemble a real transformer, the grain-oriented magnetic steel sheet can have excellent low-iron-loss characteristics. |
申请公布号 |
WO2012017689(A1) |
申请公布日期 |
2012.02.09 |
申请号 |
WO2011JP04471 |
申请日期 |
2011.08.05 |
申请人 |
JFE STEEL CORPORATION;INOUE, HIROTAKA;OMURA, TAKESHI;YAMAGUCHI, HIROI;OKABE, SEIJI |
发明人 |
INOUE, HIROTAKA;OMURA, TAKESHI;YAMAGUCHI, HIROI;OKABE, SEIJI |
分类号 |
C22C38/00;C21D8/12;C22C38/04;C22C38/60;H01F1/16;H01F1/18 |
主分类号 |
C22C38/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|