Title:
PRODUCTION OF SILICON STEEL SHEET HAVING SILICON CONCENTRATION DISTRIBUTION USING SILICONIZING METHOD
Document Type and Number:
Japanese Patent JP3395647
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a silicon steel sheet using a siliconizing method capable of obtaining desired magnetic properties without complicating a furnace structure and deteriorating the quality.
SOLUTION: Siliconizing treatment by which Si is penetrated from the surface of a steel sheet and diffusing treatment by which the penetrated Si is diffused into the steel sheet are executed in the same gas atmosphere in the same furnace. The treating time and treating interval in the siliconizing treatment and the diffusing treatment are controlled, thereby the siliconizing and diffusing rates are controlled, and the distribution of the Si concn. in the sheet thickness direction of the steel sheet is controlled.
Inventors:
Katsuji Kasai
Tsunehiro Yamaji
Misao Namikawa
Hironori Ninomiya
Tatsuhiko Hiratani
Tsunehiro Yamaji
Misao Namikawa
Hironori Ninomiya
Tatsuhiko Hiratani
Application Number:
JP11435798A
Publication Date:
April 14, 2003
Filing Date:
April 10, 1998
Export Citation:
Assignee:
Nippon Steel Tube Co., Ltd.
International Classes:
C23C10/08; C22C38/00; C22C38/02; H01F27/24; (IPC1-7): C23C10/08; C22C38/02
Domestic Patent References:
| JP790544A | ||||
| JP790545A | ||||
| JP9184051A | ||||
| JP4246157A | ||||
| JP62227078A |
Attorney, Agent or Firm:
Hiroshi Takayama