Method for optimizing electromagnetic performance of non-oriented silicon steel, and non-oriented silicon steel

Abstract

The invention particularly provides a production method for optimizing an electromagnetic performance of non-oriented silicon steel. The production method for optimizing the electromagnetic performance of the non-oriented silicon steel comprises the following steps of (1) smelting according to setting components, wherein the non-oriented silicon steel is prepared from the chemical components in percentage by mass: less than or equal to 0.005 percent of C, 0.50 to 0.80 percent of Si, 0.10 to 0.30 percent of Mn, 0.02 to 0.05 percent of P, 0.20 to 0.30 percent of Als, less than or equal to 0.004percent of S, less than or equal to 0.003 percent of O, less than or equal to 0.003 percent of N, less than or equal to 0.004 percent of Nb, less than or equal to 0.004 percent of V, less than or equal to 0.004 percent of Ti, less than or equal to 0.005 percent of Cr, and the balance Fe and inevitable impurities; and casting into a casting blank with the thickness ranging from 70 to 85mm; (2) heating in a roller way type heating furnace, wherein the heating temperature is less than or equal to 1080 DEG C, the initial rolling temperature ranges from 1020 DEG C to 1060 DEG C, and the finish rolling temperature ranges from 850 to 880 DEG C; and (3) acid pickling a hot-rolled coiled plate through an acid pickling unit, rolling the coiled plate for 5 passes at a time through a CVC6-roller single stand cold rolling mill until the thickness is 0.5mm; continuously annealing for 1.5 to 5min; and finally coating an insulating film.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and specifically provides a production method for optimizing the electromagnetic properties of non-oriented silicon steel and non-oriented silicon steel prepared by the optimization method. Background technique [0002] Silicon steel is known as a handicraft among steel products, and electromagnetic properties, as a key technical indicator of silicon steel products, are one of the important factors to measure the quality of silicon steel products. It includes two indicators of the product's iron loss (P15 / 50) and magnetic induction (B50). The lower the iron loss and the higher the magnetic induction, the better the electromagnetic performance of the product. With the continuous development of science and technology, the upgrading of end-user products has higher and higher requirements for the electromagnetic performance of silicon steel. At the same time, the continuous competition between pr...

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Problems solved by technology

[0003] Domestic manufacturers in the same industry have introduced consistent production technology for the production of silicon steel. Benxi Iron & Steel independently developed and produced non-oriented silicon steel through theoretical research, process tests and other means without possessing consistent production technology. The electromagnetic properties of silicon steel grades are: iron loss (P15 / 50) ranges from 5.8-6.2w / kg, magnetic induction (B50) ranges from 1.73-1.74T, which is relatively low in the same industry and cannot meet the requirements of downstream enterprises

[0004] At present, the electromagnetic performance of non-oriented silicon steel products is improved by means of electromagnetic stirring technology, purity control of molten steel, and product thickness precision control in the industry. However, Benxi Steel does not have electromagnetic stirring equipment, and the process control methods are limited. The general methods in the industry are not suitable. Existing production technology and production equipment cannot play a role in improving and optimizing the electromagnetic performance of products

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