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High-magnetic-induction low-iron-loss no-oriented silicon steel sheet and manufacturing method thereof

A technology of oriented silicon steel and manufacturing method, which is applied in the direction of manufacturing tools, inorganic material magnetism, furnace type, etc., can solve the problems of production site technology, quality management troubles, prolong material manufacturing and delivery cycle, increase manufacturing costs, etc., and achieve electromagnetic Excellent performance, easy operation, and stable production process

Active Publication Date: 2016-09-07
BAOSTEEL ZHANJIANG IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, 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 The disadvantage of improving the magnetic induction of materials is the introduction of new production equipment, which greatly increases manufacturing costs, prolongs the manufacturing and delivery cycles of materials, and brings new troubles to production site technology and quality management.

Method used

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  • High-magnetic-induction low-iron-loss no-oriented silicon steel sheet and manufacturing method thereof
  • High-magnetic-induction low-iron-loss no-oriented silicon steel sheet and manufacturing method thereof
  • High-magnetic-induction low-iron-loss no-oriented silicon steel sheet and manufacturing method thereof

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Embodiment

[0057] The molten iron and steel scrap are matched according to the chemical composition ratio in Table 1. After being smelted in a 300-ton converter, decarburization, deoxidation, and alloying are carried out by RH refining; the Mn content is dynamically adjusted according to the S content in the steel to obtain the optimal ratio of [Mn ] / [S], ​​control the content of C, N, Nb, V, Ti, Al to meet the design requirements; after continuous casting of molten steel, a slab with a thickness of 170mm-250mm and a width of 800mm-1400mm is obtained; The cooling rate during the cooling process of billet surface temperature from 1100°C to 700°C is controlled at 2.5 to 20°C / min; then, the temperature of billet entering the furnace is adjusted to ≤600°C, preferably ≤300°C by means of temperature control; then, The slab is hot-rolled, pickled, cold-rolled, annealed, and coated in sequence to obtain the final product. The process parameters and electromagnetic properties are shown in Table 2....

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Abstract

The invention discloses a high-magnetic-induction low-iron-loss no-oriented silicon steel sheet and a manufacturing method thereof. The no-oriented silicon steel sheet is composed of, by mass, less than or equal to 0.005% of C, 0.1%-1.6% of Si, 0.1%-0.5% of Mn, less than or equal to 0.2% of P, less than or equal to 0.004% of S, less than or equal to 0.003% of Al, less than or equal to 0.005% of N, less than or equal to 0.004% of Nb, less than or equal to 0.004% of V, less than or equal to 0.003% of Ti, and the balance Fe and inevitable impurities, wherein 120<=Mn / S<=160, and Nb / 93+V / 51+Ti / 48+Al / 27<=C / 12+N / 14. After completion of molten steel casting, the cast blank furnace inlet temperature is adjusted through a temperature control mode, stable production of the high-magnetic-induction low-iron-loss no-oriented silicon steel sheet is effectively achieved, the manufacturing cost is relatively low, and normalizing treatment or bell-type furnace intermediate annealing is not needed.

Description

technical field [0001] The invention relates to a non-oriented silicon steel sheet, in particular to a non-oriented silicon steel sheet with high magnetic induction and low iron loss and its manufacturing method, especially to a high magnetic induction sheet with relatively low manufacturing cost without normalization treatment or intermediate annealing in a bell furnace. , Low iron loss non-oriented silicon steel sheet and its manufacturing method. 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 efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21D8/12
CPCC21D8/1216C21D8/1272C22C38/001C22C38/004C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21D8/1205C21D8/1222C21D8/1233C21D8/1244C21D9/46B22D11/22C21D8/12H01F1/16
Inventor 张峰房现石谢世殊宗震宇
Owner BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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