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Title:
NON-ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MANUFACTURING NON-ORIENTED ELECTROMAGNETIC STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2018/164185
Kind Code:
A1
Abstract:
In this non-oriented electromagnetic steel sheet, the chemical composition thereof contains, in terms of mass%, 0.010% or less of C, more than 3.0% and no more than 5.0% Si, 0.1-3.0% Mn, 0.20% or less of P, 0.0018% or less of S, 0.004% or less of N, 0-0.9% Al, 0-0.100% Sn and/or Sb, 0-5.0% Cr, 0-5.0% Ni, 0-5.0% Cu, 0-0.01% Ca, and 0-0.01% rare earth elements (REM), the remainder comprising Fe and impurities, the area ratio of a crystal structure A composed of crystal grains having a grain diameter of 100 µm or greater in a cross-section parallel to a rolled surface of the non-oriented electromagnetic steel sheet is 1-30%, the average grain diameter of a crystal structure B that is a crystal structure other than the crystal structure A is 25 µm or less, and the Vickers hardness HvA of the crystal structure A and the Vickers hardness HvB of the crystal structure B satisfies the condition HvA/HvB ≤ 1.000.

Inventors:
FUJIMURA HIROSHI (JP)
ICHIE TAKERU (JP)
NATORI YOSHIAKI (JP)
YASHIKI HIROYOSHI (JP)
Application Number:
PCT/JP2018/008780
Publication Date:
September 13, 2018
Filing Date:
March 07, 2018
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C21D8/12; C22C38/60; H01F1/147
Domestic Patent References:
WO2016017263A12016-02-04
WO2013125223A12013-08-29
Foreign References:
JP2010259158A2010-11-11
JP2010121150A2010-06-03
JP2008050686A2008-03-06
JP2005120403A2005-05-12
US20110273054A12011-11-10
US20140366988A12014-12-18
JP2017042547A2017-03-02
JPS60238421A1985-11-27
JPS62112723A1987-05-23
JPH0222442A1990-01-25
JPH028346A1990-01-11
JP2005113185A2005-04-28
JP2007186790A2007-07-26
JP2010090474A2010-04-22
JPH08134606A1996-05-28
Other References:
See also references of EP 3594371A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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