METHOD FOR PRODUCING DIRECTIONAL ELECTROMAGNETIC STEEL SHEET

Title:

METHOD FOR PRODUCING DIRECTIONAL ELECTROMAGNETIC STEEL SHEET

Document Type and Number:

WIPO Patent Application WO/2011/115120

Kind Code:

A1

Abstract:

Disclosed is a method for producing a directional electromagnetic steel sheet, wherein: a decarburized nitrided steel sheet is obtained by heating and hot rolling specific steel that contains 0.0005-0.0050% by mass of Te at a temperature not more than 1,320˚C, and then subjecting the resulting steel to annealing, cold rolling, decarburization annealing and nitriding annealing; and a separating agent for annealing is applied over the surface of the decarburized nitrided steel sheet and finish annealing is carried out, thereby forming a glass coating film. The N content in the decarburized nitrided steel sheet is set to be 0.0150-0.0250% by mass and satisfy the following relation: 2 × [Te] + [N] ≤ 0.0300% by mass. In this connection, [Te] represents the Te content and [N] represents the N content.

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Inventors:

MURAKAMI KENICHI (JP)
HAMA CHIE (JP)
MIZUKAMI KAZUMI (JP)
USHIGAMI YOSHIYUKI (JP)
NAKAMURA SHUICHI (JP)

Application Number:

PCT/JP2011/056074

Publication Date:

September 22, 2011

Filing Date:

March 15, 2011

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)
MURAKAMI KENICHI (JP)
HAMA CHIE (JP)
MIZUKAMI KAZUMI (JP)
USHIGAMI YOSHIYUKI (JP)
NAKAMURA SHUICHI (JP)

International Classes:

C21D8/12; C22C38/00; C22C38/60; H01F1/16; H01F1/18

Foreign References:

JP2009209428A	2009-09-17
JPS556412A	1980-01-17
JPH03122227A	1991-05-24
JPH06184640A	1994-07-05
JPH06207220A	1994-07-26
JPH10273727A	1998-10-13
JP2009235574A	2009-10-15
JPH0578743A	1993-03-30

Other References: