Title:
SEPARATION AGENT FOR ANNEALING FOR GRAIN-OPENTED SILICON STEEL PLATE
Document Type and Number:
Japanese Patent JP2680529
Kind Code:
B2
Abstract:
PURPOSE: To increase the adhensive force to a silicon steel plate and to improve a punching property by specifying the alumina grain size of an alumina slurry and a binder and their addition amounts.
CONSTITUTION: Any one among starch, cellulose ether, polyvinyl alcohol and polyethylene glycol is added as a water-soluble org. bender to the alumina powder having 1-40μm average grain size by 0.1-2wt.% per alumina to make slurry with water. The slurry is high in stickness to silicon steel plate, therefore oxidation is prevented and the formation of a glass film is prevented by applying the binder and executing a final finishing anneal. Therefore, iron loss is reduced because the steel plate has a mirror surface and the punching property is improved.
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Inventors:
Shuichi Yamazaki
Ushigami Yoshiyuki
Takeo Nagashima
Nozomi Ishibashi
Youichi Mishima
Ushigami Yoshiyuki
Takeo Nagashima
Nozomi Ishibashi
Youichi Mishima
Application Number:
JP21160293A
Publication Date:
November 19, 1997
Filing Date:
August 26, 1993
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C21D1/70; C21D9/46; C23C22/00; (IPC1-7): C21D9/46
Attorney, Agent or Firm:
Tachio Chanogi (1 outside)
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