Title:
NON-ORIENTED ELECTRICAL STEEL PLATE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/017345
Kind Code:
A1
Abstract:
Disclosed in the present invention is a non-oriented electrical steel plate, which comprises, in addition to Fe and inevitable impurities, the following chemical elements in percentages by mass: C: 0.001-0.004%, Si: 2.0-3.8%, Mn: 0.05-1.0%, Al≤1.51%, Ca: 0.0003-0.01%, and Cr: 0.005-0.4%. In addition, further disclosed in the present invention is a manufacturing method for manufacturing the non-oriented electrical steel plate. The manufacturing method comprises the steps of: (1) smelting and casting; (2) heating and rolling, wherein during the heating of a continuously cast bloom in a heating furnace, when the temperature is raised to 1020ºC or more, the heating rate is controlled to be 0.8-2.0ºC/min and the final rolling temperature is controlled to be ≥880ºC; moreover, the retention time after final rolling and before laminar cooling is controlled to be 5-40 s; (3) normalizing and annealing; (4) acid pickling; (5) cold rolling; (6) continuous annealing; and (7) coating with an insulating coating.
Inventors:
ZHANG FENG (CN)
LV XUEJUN (CN)
FANG XIANSHI (CN)
HAO YUNWEI (CN)
WANG BO (CN)
LV XUEJUN (CN)
FANG XIANSHI (CN)
HAO YUNWEI (CN)
WANG BO (CN)
Application Number:
PCT/CN2023/108440
Publication Date:
January 25, 2024
Filing Date:
July 20, 2023
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/00; C21D6/00; C21D8/02; C21D8/12; C21D9/46; C22C38/02; C22C38/04; C22C38/06; C22C38/18; H01F1/147
Domestic Patent References:
| WO2021124780A1 | 2021-06-24 |
Foreign References:
| CN112030076A | 2020-12-04 | |||
| CN110536971A | 2019-12-03 | |||
| CN114086058A | 2022-02-25 | |||
| CN114630918A | 2022-06-14 | |||
| KR20200066494A | 2020-06-10 | |||
| US20190382867A1 | 2019-12-19 | |||
| CN102409252A | 2012-04-11 |
Other References:
YIWEI LI ，, LI DEJUN; QIAO HAOHAO: "Analysis of the factors influencing the electromagnetic properties of high punching 50BW600 non-oriented silicon steel", ELECTRICAL STEEL, vol. 2, no. 2, 28 June 2020 (2020-06-28), pages 31 - 34, 52, XP093130223
Attorney, Agent or Firm:
WATSON & BAND INTELLECTUAL PROPERTY AGENT LTD. (CN)
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