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Title:
HIGH-GRADE NON-ORIENTED SILICON STEEL AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/127104
Kind Code:
A1
Abstract:
Disclosed are high-grade non-oriented silicon steel and a production method therefor. The chemical composition of the non-oriented silicon steel comprises, according to mass percentage: C: 0.002–0.004%, S≤0.003%, Si: 1.4–1.7%, Mn: 0.7–0.95%, P≤0.03%, and Sn: 0.015–0.035%, wherein 11×([Si]-1.4%)＝14×([Mn]-0.7%). In the production method for the non-oriented silicon steel, the continuous casting blank heating temperature is 1120–1150°C, the finishing rolling temperature is 890±15°C, the downward-pressing amount of the final instance of finishing rolling is ≥30%, the total downward-pressing amount of the last two instances of finishing rolling is ≥50%, and the coiling temperature is 650±20°C. It is not necessary to perform a normalization treatment before acid continuous rolling, and the obtained non-oriented silicon steel has good magnetic properties, has no corrugation defects on the surface, and meets the requirements of low-cost high-grade non-oriented silicon steel.

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Inventors:
YUE CHONGXIANG (CN)
WU SHENGJIE (CN)
LU JIADONG (CN)
LI HUI (CN)
Application Number:
PCT/CN2021/107028
Publication Date:
June 23, 2022
Filing Date:
July 19, 2021
Export Citation:
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Assignee:
INSTITUTE OF RES OF IRON & STEEL JIANGSU PROVINCE/SHA STEEL CO LTD (CN)
ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO LTD (CN)
JIANGSU SHAGANG GROUP CO LTD (CN)
International Classes:
C22C38/02; C21D8/12; C22C33/04; C22C38/04
Foreign References:
CN112609130A2021-04-06
CN110592460A2019-12-20
CN112030059A2020-12-04
CN101139681A2008-03-12
Other References:
See also references of EP 4206353A4
Attorney, Agent or Firm:
SUZHOU WISPRO INTELLECTUAL PROPERTY AGENCY (CN)
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