METHOD FOR PRODUCING NON-ORIENTED MAGNETIC STEEL SHEET

Title:

METHOD FOR PRODUCING NON-ORIENTED MAGNETIC STEEL SHEET

Document Type and Number:

Japanese Patent JP2013189693

Kind Code:

A

Abstract:

To provide a method for producing a non-oriented magnetic steel sheet having a high magnetic flux density and little iron loss.

A method for producing a non-oriented magnetic steel sheet is provided, the method comprises: hot rolling a steel slab which contains 0.005 mass% or less of C, 4 mass% or less of Si, 0.03-3 mass% of Mn, 3 mass% or less of Al, 0.03-0.2 mass% of P, 0.005 mass% or less of S, 0.005 mass% or less of N, 0.0005-0.01 mass% of Ca, with an atomic ratio of Ca to S (Ca (mass%)/40)/(S (mass%)/32) being 0.5-3.5, and the balance made up of Fe and unavoidable impurities; annealing the hot rolled plate; cold rolling the annealed hot rolled plate; and then subjecting the cold rolled plate to recrystallization annealing by heating to at least 740°C at an average temperature rising speed of ≥100°C/sec.

Inventors:

ZAIZEN YOSHIAKI
ODA YOSHIHIKO
TODA HIROAKI
NAKANISHI TADASHI

Application Number:

JP2012058429A

Publication Date:

September 26, 2013

Filing Date:

March 15, 2012

Export Citation:

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Assignee:

JFE STEEL CORP

International Classes:

C21D8/12; C22C38/00; C22C38/06; C22C38/60; H01F1/16

Domestic Patent References:

JPS644455A	1989-01-09
JPH03126845A	1991-05-30
JP2001158949A	2001-06-12
JP2005206887A	2005-08-04
JP2005200755A	2005-07-28
JP2007217744A	2007-08-30
JPH0651889B2	1994-07-06
JPH06228645A	1994-08-16
JP2012046806A	2012-03-08

Attorney, Agent or Firm:

Ginza Marronnier Patent Office
Junzo Ogawa
Morio Nakamura
Shiro Fujitani

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