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Title:
NON-ORIENTED ELECTROMAGNETIC STEEL SHEET, MOTOR CORE, PRODUCTION METHOD FOR NON-ORIENTED ELECTROMAGNETIC STEEL SHEET, AND PRODUCTION METHOD FOR MOTOR CORE
Document Type and Number:
WIPO Patent Application WO/2022/210530
Kind Code:
A1
Abstract:
Provided is a non-oriented electromagnetic steel sheet that is characterized by having a prescribed chemical composition. The non-oriented electromagnetic steel sheet is also characterized in that, in a cross-section that is parallel to a rolled surface of the non-oriented electromagnetic steel sheet, the area ratio of a crystal structure A that is formed from crystal grains that have a grain size of at least 100 μm is 1%–30%. The non-oriented electromagnetic steel sheet is also characterized in that the average grain size of a crystal structure B that is not crystal structure A is no more than 40 μm. The non-oriented electromagnetic steel sheet is also characterized in that the Vickers hardness HvA of crystal structure A and the Vickers hardness HvB of crystal structure B satisfy expression 1 ((HvA2+HvB2)/2-(HvA+HvB)2/4≤7.0).

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Inventors:
TANAKA ICHIRO (JP)
WAKISAKA TAKEAKI (JP)
MURAKAWA TESSHU (JP)
NATORI YOSHIAKI (JP)
FUJIMURA HIROSHI (JP)
Application Number:
PCT/JP2022/014988
Publication Date:
October 06, 2022
Filing Date:
March 28, 2022
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/12; C21D9/46; C22C38/00; C22C38/60; C23C22/00; H01F1/147; H01F41/02; H02K1/00; H02K1/02; H02K15/02
Domestic Patent References:
WO2018164185A12018-09-13
WO2019017426A12019-01-24
WO2021006280A12021-01-14
WO2020137500A12020-07-02
WO2018164185A12018-09-13
Foreign References:
JP2019507243A2019-03-14
KR20200035754A2020-04-06
CN112143961A2020-12-29
JP2021061565A2021-04-15
JP2021061707A2021-04-15
JP2021094802A2021-06-24
JPS60238421A1985-11-27
JPS62256917A1987-11-09
JPH01162748A1989-06-27
JPH028346A1990-01-11
JPH06330255A1994-11-29
JP2005113185A2005-04-28
JP2006070296A2006-03-16
JP2018021242A2018-02-08
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
Download PDF:
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