Oriented silicon steel and method for manufacturing same

US10566119B2 · kind B2 · utility

Assignee

• BAOSHAN IRON & STEEL CO., LTD. · CN

Inventors

• Guohua Yang · San Jose, US
• Xiandong Liu · Shanghai, CN
• Guobao Li · Shanghai, CN
• Yongjie Yang · Shanghai, CN
• Zhuochao Hu · Shanghai, CN
• Hongxu Hei · Shanghai, CN
• Jun Zhang · Shanghai, CN
• Dejun Su · Shanghai, CN
• Huande Sun · Shanghai, CN
• Meihong Wu · Shanghai, CN

Key dates

• Filing date: Dec 11, 2012
• Grant date: Feb 18, 2020
• Expiry date: Dec 11, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D2201/05
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention discloses an oriented silicon steel with excellent magnetic properties and a manufacturing method thereof. The present invention obtains the oriented silicon steel with excellent magnetic properties by controlling the area ratio of small crystal grains of D<5 mm in an oriented silicon steel finished product to be not more than 3%, and controlling the ratio μ17/μ15 of the magnetic conductivity under the magnetic induction of 1.7 T and 1.5 T in the oriented silicon steel finished product to be 0.50 or more. In addition, by using a slab of the oriented silicon steel with suitable components and an optimized cold rolling step, the present invention effectively decreases the heating temperature of the slab and the production cost thereof, and simultaneously better controls the size and ratio of the crystal grains in the oriented silicon steel finished product and the magnetic conductivity in a certain range of magnetic induction, ensures that secondary recrystallization has good Goss texture orientation and finally, stably obtains the oriented silicon steel product with excellent magnetic properties.