A production method for improving the anisotropy of electromagnetic properties of electrical steel products
A production method and anisotropic technology, applied in the field of cold-rolled non-oriented electrical steel production, can solve problems such as limited application scope of products, and achieve the effects of improving overall operating stability, reducing magnetic differences, and improving yield
Active Publication Date: 2019-05-31
ANGANG STEEL CO LTD
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Problems solved by technology
In the current continuous annealing process, in order to maintain the stable operation of the unit, the tension control method of micro tension (far smaller than the yield strength of the steel strip) is usually used; through the process of rolling state control and microstructure control before cold rolling, to meet the iron loss of the product The anisotropy meets the requirements of the national standard of 8% to 17%, but the application range of products produced by this method is limited
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[0014] A kind of production method of improving the electromagnetic property anisotropy of electrical steel product described in the present invention comprises:
[0015] 1) Taking the yield strength of the cold-rolled electrical steel strip corresponding to the heating temperature as a reference, increase the tension of the steel strip into the furnace to ensure that the elongation of the cold-rolled electrical steel strip is controlled at 0.10% to 5.00%. The original energy storage form of the main texture components of the rear steel strip in 111 orientation, 110 orientation and 100 orientation;
[0016] 2) Adjust the overall length of the heating section of the annealing furnace and the rapid temperature rise rate, and control the temperature rise rate of the cold-rolled electrical steel strip to 400-850°C / min, so as to increase the incubation time of crystal nuclei of different texture components and obtain a uniform texture Finished cold-rolled strips of electrical steel...
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Abstract
The invention relates to a production method capable of improving the anisotropy of electromagnetic properties of an electrical steel product. The method comprises the following steps: 1) improving the furnace-entering tension of steel bands, controlling the elongation percentages of cold-rolled steel bands of electrical steel to be in a range of 0.10 to 5.00%, and changing the original energy storage forms of the main texture components of 111-oritention cold-rolled steel bands, 110-oritention cold-rolled steel bands and 100-oritention cold-rolled steel bands through stress changes; and 2) adjusting the integral length and rapid heating rate of the heating section of an annealing furnace, and controlling the heating rate of the cold-rolled steel bands of electrical steel to be in a rangeof 400 to 850 DEG C / min so as to improve the nucleus inoculation time of different texture components and to obtain finished cold-rolled electrical steel bands with uniform texture. The production method provided by the invention employs the principles of materials science, is based on conventional processes, makes use of the influence mechanism of stress on microscopic texture and structure and controls recrystallization during heat treatment of the product, thereby achieving the purpose of reducing the longitudinal and transverse magnetic difference of electrical steel products and producingelectrical steel products with excellent anisotropy of electromagnetic properties.
Description
technical field [0001] The invention relates to the technical field of cold-rolled non-oriented electrical steel production, in particular to a production method for improving the anisotropy of electromagnetic properties of electrical steel products. Background technique [0002] Cold-rolled non-oriented electrical steel products are important metal functional soft magnetic materials, which are widely used in the manufacture of iron cores required for electromagnetic conversion in various industries. In the production process of cold-rolled non-oriented electrical steel in iron and steel complexes, multi-process and long-term process control is carried out for the chemical composition, microstructure and microscopic crystal structure that affect the material properties. The heat treatment of the finished product is to obtain good electromagnetic properties and control the microstructure. important process. [0003] The heat treatment process of cold-rolled non-oriented elec...
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IPC IPC(8): C21D8/12
Inventor 高振宇陈春梅马云龙李亚东张智义胡洪旭王玉琦赵健朱丽君李志坚
Owner ANGANG STEEL CO LTD