方向性電磁鋼板の製造方法

Title:

方向性電磁鋼板の製造方法

Document Type and Number:

Japanese Patent JP4239454

Kind Code:

B2

Abstract:

To effectively prevent the formation of an SiO2-deficient layer at the time of decarburizing annealing and to provide a grain-oriented electrical steel sheet excellent in film formation and having superior electromagnetic properties.

A slab of silicon-containing steel is hot-rolled and then cold- rolled once or cold-rolled two or more times, while process-annealed between cold rolling steps, to final sheet thickness, and the resultant steel sheet is subjected to electrolytic degreasing treatment, decarburizing annealing and finish annealing. In the above method for manufacturing the grain-oriented electrical steel sheet, when the decarburizing annealing is applied after the electrolytic degreasing treatment, the formation rate of SiO2in oxides formed in the surface layer at the surface of the steel sheet after the decarburizing annealing is made to ≤70%.

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Inventors:

Makoto Ando

Application Number:

JP2001375581A

Publication Date:

March 18, 2009

Filing Date:

December 10, 2001

Export Citation:

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Assignee:

jfe Steel Corporation

International Classes:

C21D9/46; C23C22/00; C23C22/78; C25F1/00

Domestic Patent References:

JP8143970A
JP11264019A
JP4202713A
JP10330843A
JP9078131A

Attorney, Agent or Firm:

Kenji Sugimura
Kiyoshi Kuruma
Kosaku Sugimura

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