Title:
WOUND CORE
Document Type and Number:
WIPO Patent Application WO/2022/092118
Kind Code:
A1
Abstract:
This wound core comprises a wound core body having a substantially rectangular shape in a side surface view, wherein in the wound core body, a first flat surface part and corner part are alternately continuous in the longitudinal direction, each corner part has a curved shape in a side surface view of a grain-oriented electrical steel sheet, there are two or more bent parts having a second flat surface part between adjacent bent parts, and in a first flat surface part and second flat surface part in the vicinity of at least one of the bent parts, the following equation (1) is satisfied. (1): (Nac + Nal)/Nt ≥ 0.010. Nt is the total number of grain boundary determination points in the first flat surface part and second flat surface part region adjacent to the curved part, and Nac and Nal are each the number of determination points in which a subgrain boundary can be confirmed in a direction parallel to or perpendicular to the bending part boundary.
Inventors:
NAKAMURA SHUICHI (JP)
Application Number:
PCT/JP2021/039555
Publication Date:
May 05, 2022
Filing Date:
October 26, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; C22C38/02; C22C38/60; H01F1/147; H01F27/245
Domestic Patent References:
| WO2020027215A1 | 2020-02-06 | |||
| WO2020027218A1 | 2020-02-06 | |||
| WO2020027219A1 | 2020-02-06 |
Foreign References:
| JP2018148036A | 2018-09-20 | |||
| JP2020178553A | 2020-11-05 | |||
| JP2001192785A | 2001-07-17 | |||
| JP2005240079A | 2005-09-08 | |||
| JP2012052229A | 2012-03-15 | |||
| JP2004143532A | 2004-05-20 | |||
| JP2006219690A | 2006-08-24 | |||
| JP2001303214A | 2001-10-31 | |||
| JP2005286169A | 2005-10-13 | |||
| JP6224468B2 | 2017-11-01 | |||
| JP2018148036A | 2018-09-20 | |||
| AU2012337260A1 | 2014-05-22 |
Other References:
See also references of EP 4234730A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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