Manufacture method of high-efficiency non-oriented silicon steel with excellent magnetic performance

US9816152B2 · kind B2 · utility

Assignee

• BAOSHAN IRON & STEEL CO., LTD. · CN

Inventors

• Aihua Ma · Shanghai, CN
• Bo Wang · Shanghai, CN
• Shishu Xie · Shanghai, CN
• Zhanyuan Hu · Shanghai, CN
• Liang Zou · Beijing, CN
• Zitao Wang · Sheboygan, US
• Yuhua Zhu · Windsor, CA
• Jie Huang · Shanghai, CN
• Bingzhong Jin · Shanghai, CN
• Xiandong Liu · Shanghai, CN

Key dates

• Filing date: Apr 27, 2011
• Grant date: Nov 14, 2017
• Expiry date: Oct 21, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01F1/16
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A manufacture method of high-efficiency non-oriented silicon steel with excellent magnetic property includes the steps of smelting a chemical composition of non-oriented silicon steel, by weight percent, is: C≦0.0040%, Si:0.1˜0.8%, Al:0.002˜1.0%, Mn:0.10˜1.50%, P:≦0.2%, Sb:0.04˜0.08%, S≦0.0030%, N≦0.0020%, Ti≦0.0020%, and the rest is Fe and unavoidable inclusions. The molten steel is then cast into billets which are hot-rolled into a hot-rolled product. The heating temperature for the billet is 1100°˜1150° and the finish-rolling temperature is 860°˜920°. The hot-rolled product is then air cooled for a period of time within a range determined by air cooling time t: (2+30xSb %)s≦t≦7 s. The hot-rolled product is reeled at a temperature ≧720° and cold-rolled to form cold-rolled plate with a target thickness at a reduction ratio of 70˜78% followed by heating up the cold-rolled plate to 800˜1000° at heating rate of ≧15°/s, and holding time of 10 s˜25 s.