Title:
NON-ORIENTED ELECTROMAGNETIC STEEL SHEET, MOTOR CORE, AND METHODS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/176865
Kind Code:
A1
Abstract:
A non-oriented electromagnetic steel sheet, wherein: the chemical composition of a base material, in mass%, is not more than 0.0050% C, more than 3.70% but not more than 4.60% Si, more than 0.20% but not more than 0.50% Mn, 0.23-0.75% Al, not more than 0.030% P, not more than 0.0018% S, not more than 0.0040% N, 0.005-0.040% Sn, 0-0.040% Sb, the remainder being Fe and impurities, with [4.2≤Si+Al+0.5×Mn≤4.9] being satisfied; the N content [N]s at a position 20 μm from the surface of the base material in the depth direction is not more than 0.0060%; the base material has an average crystal grain size of 10-30 μm; iron loss W10/400 is not more than 20.0 W/kg; saturation magnetic flux density is not less than 1.945 T; tensile strength is not less than 680 MPa; and thickness is 0.10-0.30 mm.
Inventors:
YASHIKI HIROYOSHI (JP)
NATORI YOSHIAKI (JP)
TAKEDA KAZUTOSHI (JP)
TANAKA ICHIRO (JP)
HORI HIROKI (JP)
NATORI YOSHIAKI (JP)
TAKEDA KAZUTOSHI (JP)
TANAKA ICHIRO (JP)
HORI HIROKI (JP)
Application Number:
PCT/JP2023/009982
Publication Date:
September 21, 2023
Filing Date:
March 15, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; C22C38/60; H01F1/147; H02K1/02; H02K1/04; H02K15/02
Domestic Patent References:
| WO2020262063A1 | 2020-12-30 | |||
| WO2020166718A1 | 2020-08-20 | |||
| WO2018025941A1 | 2018-02-08 |
Foreign References:
| JP2011246810A | 2011-12-08 | |||
| JP2000256751A | 2000-09-19 | |||
| KR20210079545A | 2021-06-30 | |||
| KR20210080726A | 2021-07-01 |
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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