Title:
NON-ORIENTED ELECTROMAGNETIC STEEL SHEET, MANUFACTURING METHOD THEREFOR, AND MOTOR CORE
Document Type and Number:
WIPO Patent Application WO/2023/282197
Kind Code:
A1
Abstract:
Provided are: a high-strength non-oriented electromagnetic steel sheet having favorable fatigue characteristics suitable for a rotor core; and a non-oriented electromagnetic steel sheet having excellent magnetic characteristics suitable for a stator core. This non-oriented electromagnetic steel sheet has a component composition which contains, in terms of mass%, at most 0.01% of C, 2.0-4.5% (exclusive of 4.5) of Si, 0.05-5.00% of Mn, at most 0.1% of P, at most 0.01% of S, at most 3.0% of Al, and at most 0.005% of N, with less than 4.5% of Si+Al and the remainder consisting of Fe and inevitable impurities, and is characterized in that crystal grains in the steel sheet have an average crystal grain diameter X1 of at most 50 μm, a standard deviation S1 of the crystal grain diameter distribution satisfying S1/X1<0.75, and a kurtosis K1 of the crystal grain diameter distribution of at most 20.0.
Inventors:
TANAKA TAKAAKI (JP)
OKUBO TOMOYUKI (JP)
ZAIZEN YOSHIAKI (JP)
MIYAMOTO YUKINO (JP)
OKUBO TOMOYUKI (JP)
ZAIZEN YOSHIAKI (JP)
MIYAMOTO YUKINO (JP)
Application Number:
PCT/JP2022/026420
Publication Date:
January 12, 2023
Filing Date:
June 30, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C21D9/46; C22C38/00; C22C38/06; C22C38/60; H01F1/147; H01F27/245
Domestic Patent References:
| WO2020090160A1 | 2020-05-07 |
Foreign References:
| JP2002180213A | 2002-06-26 | |||
| JP2018178197A | 2018-11-15 | |||
| US20140373340A1 | 2014-12-25 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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