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Title:
PRODUCTION OF GRAIN ORIENTED SILICON STEEL SHEET EXCELLENT IN SURFACE CHARACTERISTIC
Document Type and Number:
Japanese Patent JP3425708
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To prevent the occurrence of surface flaw and to stably obtain superior magnetic properties by performing, e.g. control of the amount of water, poured on a sheet bar just before finish rolling, to a prescribed value.
SOLUTION: The amount of water poured on the surface of a sheet bar, in 5sec after hot roughing and just before hot finish rolling, is controlled to ≤51/m2. Further, just before finish rolling, the difference of temp. between the surface and a position at a depth of 1mm inward in a plate-thickness direction from the surface is controlled to a value within the range of the value computed from the prescribed inequality using a composition of components as parameter. By these procedures, a silicon steel sheet, capable of preventing the occurrence of surface flaw and excellent in magnetic properties as well as in surface characteristic, can be obtained. Moreover, the above effects can be produced more effectively by coiling the sheet bar before hot finish rolling.


Inventors:
Takamiya, Toshito
Senda, Kunihiro
Komatsubara, Michiro
Muraki, Mineo
Application Number:
JP1996000284806
Publication Date:
July 14, 2003
Filing Date:
October 28, 1996
Export Citation:
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Assignee:
KAWASAKI STEEL CORP
International Classes:
C21D8/12; C22C38/00; C22C38/60; H01F1/16; (IPC1-7): C21D8/12
Attorney, Agent or Firm:
杉村 興作 (外2名)