GRAIN ORIENTED SILICON STEEL SHEET EXCELLENT IN FILM CHARACTERISTIC AND PRODUCING METHOD THEREFOR

Title:

GRAIN ORIENTED SILICON STEEL SHEET EXCELLENT IN FILM CHARACTERISTIC AND PRODUCING METHOD THEREFOR

Document Type and Number:

Japanese Patent JP3482374

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To produce a grain oriented silicon steel sheet with a high occupying volume ratio having a tension applying effect higher than that by the conventional method, excellent in adhesion and magnetic properties and moreover excellent in corrosion resistance which allows the same to withstand the practical use and to provide a method for producing an insulating film therefor.
SOLUTION: This grain oriented silicon steel sheet has an insulating film composed of a layer essentially consisting of the hydrogen phosphate of a bivalent or trivalent metal and silica as a first layer and a layer essentially consisting of aluminum borate whose surface roughness is controlled to 0.1 to 0.50 μm by Ra (center line average roughness) as a second layer on the surface.

More Like This:

JPH06316771	ORGANIC COMPOSITE COATED STEEL EXCELLENT IN WELDABILITY, CORROSION RESISTANCE AND IMAGE CLARITY
JPS59215421	METHOD FOR FORMING FILM CONTAINING ZIRCONIA ON SURFACE OF SILICON STEEL SHEET

Inventors:

Kazutoshi Takeda
Shuichi Yamazaki
Hideyuki Kobayashi
Hiroyasu Fujii

Application Number:

JP2000137551A

Publication Date:

December 22, 2003

Filing Date:

May 10, 2000

Export Citation:

Click for automatic bibliography generation Help

Assignee:

Nippon Steel Corporation

International Classes:

C23C22/00; C04B28/34; C21D8/12; C21D9/46; C23C22/74; H01F1/147; H01F1/16; H01F1/18; (IPC1-7): C23C22/00; C21D9/46; H01F1/16; H01F1/18

Domestic Patent References:

JP4254586A
JP8283956A

Attorney, Agent or Firm:

Hiroaki Tamura (1 outside)

Previous Patent: POT AND METHOD OF MANUFACTURING THE SAME

Next Patent: CONTROL VALVE FOR SUPPLYING HOT WATER