High magnetic induction and low iron loss non-oriented electrical steel sheet with good surface state and manufacturing method therefor

US10844451B2 · kind B2 · utility

Assignee

• BAOSHAN IRON & STEEL CO., LTD. · CN

Inventors

• Feng Zhang · 南丰镇, CN
• Bo Wang · Shanghai, CN
• Yanli Song · Shanghai, CN
• Xuejun Lv · Shanghai, CN
• Aihua Ma · Shanghai, CN
• Changguo Huang · Shanghai, CN

Key dates

• Filing date: Dec 8, 2015
• Grant date: Nov 24, 2020
• Expiry date: Jan 5, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01F1/147
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed is a non-oriented electrical steel plate having a good surface state, a high magnetic induction and a low iron loss, the contents of various chemical elements of the non-oriented electrical steel plate in mass percentage being: 0<C≤0.004%, 0.1%≤Si≤1.6%, 0.1%≤Mn≤0.8%, 0.1%≤Al≤0.6%, Ti≤0.0015%, and the balance being Fe and other inevitable impurities, with 0.2%≤(Si+Al)≤2.0% being met. Also disclosed is a method for manufacturing the above-mentioned steel plate, comprising the steps: a liquid iron pretreatment, smelting with a converter, RH refining, casting into slabs, hot rolling, acid pickling, cold rolling, annealing and coating. The non-oriented electrical steel plate of the present invention has an excellent magnetic property, an ultralow iron loss and a higher steel purity; in addition the surface quality of the steel plate is good and the production cost is low.