Title:
NON-ORIENTED ELECTROMAGNETIC STEEL SHEET AND PRODUCTION METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2024/095665
Kind Code:
A1
Abstract:
The present invention involves hot rolling, hot-rolled-sheet annealing, cold rolling, and finish annealing a steel slab that contains, by mass%, 0.0005%–0.0100% of C, 2.0%–4.5% of Si, 0.1%–2.0% of Mn, and a total of 0.01%–0.20% of at least one of Sn and Sb. The average heating temperature of the finish annealing is 700°C–1100°C, the average heating time is at least 2 s, and the cooling speed of a cooling process from the average heating temperature of the finish annealing to 200°C, the composition and dew point of an ambient gas, and the variation in the temperature in the sheet width direction are controlled to satisfy prescribed conditions to obtain a non-oriented electromagnetic steel sheet that has a yield strength of at least 300 MPa at 150°C and a variation in said yield strength of no more than 30 MPa in the sheet width direction.
Inventors:
SAITO HAYATO (JP)
OKUBO TOMOYUKI (JP)
ZAIZEN YOSHIAKI (JP)
MARUYAMA SHIGEHIRO (JP)
OKUBO TOMOYUKI (JP)
ZAIZEN YOSHIAKI (JP)
MARUYAMA SHIGEHIRO (JP)
Application Number:
PCT/JP2023/036145
Publication Date:
May 10, 2024
Filing Date:
October 04, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/12; C22C38/00; C22C38/60; H01F1/147
Domestic Patent References:
| WO2019017426A1 | 2019-01-24 |
Foreign References:
| JP2020509184A | 2020-03-26 | |||
| JP2002294414A | 2002-10-09 | |||
| JPH04128318A | 1992-04-28 | |||
| JPS6347333A | 1988-02-29 | |||
| KR20230094463A | 2023-06-28 |
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
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