Title:
PRODUCTION OF GRAIN-ORIENTED SILICON STEEL SHEET REDUCED IN IRON LOSS
Document Type and Number:
Japanese Patent JP2599867
Kind Code:
B2
Abstract:
PURPOSE: To reduce the iron loss of a grain-oriented silicon steel sheet by an industrially advantageous method.
CONSTITUTION: A slab of a silicon steel which has a composition containing, by weight, 2.0-4.0% Si and further containing either or both of S and Se as inhibitor forming components is hot-rolled, cold-rolled once or cold-rolled twice or more while process-annealed between the cold rolling stages so as to be formed to the final sheet thickness, and subjected to decarbur-annealing, and then, the resulting sheet is subjected, after the application of a separation agent at annealing composed essentially of MgO to the surface of the steel sheet, to secondary recrystallization annealing and to purification annealing. At the time of producing a grain-oriented silicon steel sheet by a series of stages mentioned above, cold rolling is performed while allowing an oxide layer to be present on the surface of the steel sheet.
Inventors:
Yasuyuki Hayakawa
Fumihiko Takeuchi
Michio Komatsubara
Masataka Yamada
Yoshiaki Iida
Nishiike
Bunjiro Fukuda
Fumihiko Takeuchi
Michio Komatsubara
Masataka Yamada
Yoshiaki Iida
Nishiike
Bunjiro Fukuda
Application Number:
JP19133492A
Publication Date:
April 16, 1997
Filing Date:
June 26, 1992
Export Citation:
Assignee:
Kawasaki Steel Co., Ltd.
International Classes:
C21D8/12; C22C38/00; C22C38/60; H01F1/16; (IPC1-7): C21D8/12; H01F1/16
Domestic Patent References:
| JP6184326A |
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)