Cu-containing high-cleanliness non-oriented electrical steel plate and manufacturing method thereof

Abstract

The invention discloses a Cu-containing high-cleanliness non-oriented electrical steel plate. The Cu-containing high-cleanliness non-oriented electrical steel plate comprises the chemical elements of,by mass, larger than 0 and less than or equal to 0.003% of C, 0.1% to 2.0% of Si, 0.1% to 0.6% of Mn, 0 to 0.004% of S, 0.003% to 0.2% of Cu, 0.1% to 1.0% of Al, and the balance Fe and other inevitable impurities. In addition, the invention further discloses a continuous annealing process of the Cu-containing high-cleanliness non-oriented electrical steel plate. Besides, the invention further discloses a manufacturing method of the Cu-containing high-cleanliness non-oriented electrical steel plate. The manufacturing method comprises the steps of carrying out smelting and casting; carrying outhot rolling; carrying out normalizing; carrying out cold rolling; carrying out the continuous annealing process; and carrying out insulating and coating to obtain the finished non-oriented electricalsteel plate. The Cu-containing high-cleanliness non-oriented electrical steel plate is high in cleanliness and excellent in magnetic performance.

Description

technical field [0001] The invention relates to a steel plate and a manufacturing method thereof, in particular to a non-oriented electrical steel plate and a manufacturing method thereof. Background technique [0002] In recent years, with the increasingly stringent demand for high efficiency, energy saving, and environmental protection in the user market, it is required that the non-oriented silicon steel sheet used for making motors, compressors, and EI iron core raw materials should have excellent quality under the premise of ensuring price competitiveness. Electromagnetic properties, commonly known as low iron loss and high magnetic induction, meet the urgent needs of these electrical products for high efficiency, energy saving, and environmental protection. [0003] In order to obtain good electromagnetic properties, the content of silicon and aluminum in steel is usually greatly increased to effectively increase the resistivity of the material, thereby effectively red...

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Problems solved by technology

[0007] At this stage, normalizing treatment or intermediate annealing in bell furnace is an effective method to improve the iron loss and magnetic induction of materials. It is widely used in the production of high-efficiency and high-grade non-oriented silicon steel sheets, which can effectively reduce the iron loss of materials and greatly Improve the magnetic induction of materials, but its disadvantage is the introduction of new production equipment, which greatly increases the manufacturing cost, prolongs the manufacturing and delivery cycle of materials, and brings new troubles to production site technology and quality management.

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