Title:
HIGH-SILICON ELECTROMAGNETIC STEEL SHEET AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP3944827
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a high-silicon electromagnetic steel sheet having low iron- loss characteristics in a high-frequency region, maintaining a high amplitude- permeability characteristic.
SOLUTION: The high-silicon electromagnetic steel sheet is characterized by including Si of 5-7 wt.%, Cr of 0.1-2 wt.% and Al of less than 0.005 wt.%, and having thickness of 0.3 mm or less, and a structure containing penetrating grains through the sheet thickness. The manufacturing method preferably includes heating the rolled steel thin-sheet containing 4% or less Si in a continuous furnace at the temperature of 1,050°C or higher in an atmosphere of silicon tetrachloride or the like to obtain the above composition range. Coarse grains can be obtained by magnetically annealing the steel at a temperature of 1,050°C or higher.
Inventors:
Koichiro Fujita
Yoshikazu Takada
Yoshikazu Takada
Application Number:
JP2001359020A
Publication Date:
July 18, 2007
Filing Date:
November 26, 2001
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C22C38/00; C23C10/08; C21D9/46; C22C38/34; H01F1/16; (IPC1-7): C22C38/00; C21D9/46; C22C38/34; C23C10/08; H01F1/16
Domestic Patent References:
| JP11286754A | ||||
| JP5295492A | ||||
| JP2001003145A | ||||
| JP10121213A |
Attorney, Agent or Firm:
Toshiaki Hosoe