Non-oriented silicon steel for efficient inverter compressor and manufacturing method thereof

Abstract

The invention discloses non-oriented silicon steel for an efficient inverter compressor and a manufacturing method thereof, and belongs to the technical field of non-oriented silicon steel. The non-oriented silicon steel comprises the following chemical components in percentage by weight: less than or equal to 0.003% of C, 2.0%-2.7% of Si, 0.2%-0.5% of Mn, 0.2%-0.7% of Als, 0.06%-0.11% of Sn, lessthan or equal to 0.005% of S, less than or equal to 0.03% of P, less than or equal to 0.003% of N, less than or equal to 0.003% of Ti and the balance of Fe and inevitable impurities. The preparationprocess includes smelting, continuous casting, heating, hot rolling, normalizing pickling, cold rolling, annealing and coating. In the normalizing pickling process, the normalizing temperature is 880-940 DEG C, the normalizing time is 2-5 minutes, shot blasting treatment is carried out after normalizing to remove oxide scales on the surface of the strip steel, then hydrochloric acid is adopted forpickling, the pickling temperature is 75-90 DEG C, and it is ensured that the surface of the strip steel is cleaned up. The invention aims to overcome the defect of high iron loss of non-oriented silicon steel with high magnetic induction and magnetic property in the prior art, and can meet the requirements of low iron loss and high magnetic induction and magnetic property for the high-efficiencyinverter compressor.

Description

technical field [0001] The invention belongs to the technical field of non-oriented silicon steel production, and more specifically relates to a non-oriented silicon steel for high-efficiency inverter compressors and a manufacturing method thereof. Background technique [0002] Non-oriented silicon steel is mainly used to produce iron cores of various rotating electrical machines, and is an important energy-saving metal functional material. Non-oriented silicon steel is divided into high, medium, and low grades according to the content of alloy elements. Medium and low grades of non-oriented silicon steel are mainly used to manufacture iron cores for small and medium-sized household motors or generators, and high-grade silicon steels are mainly used for iron cores for large industrial motors and generators. However, with the development of high-efficiency energy-saving and green production in the global manufacturing industry, high-efficiency energy-saving has become a conse...

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Problems solved by technology

[0005] Another example is the Chinese patent application number: 2019104586842, the title of the invention is: high-efficiency non-oriented silicon steel and its preparation method, which discloses a high-efficiency non-oriented silicon steel and its preparation method, and its alloy chemical composition: Si content 1.0%, ~2.0% , Mn content is 0.25%, ~0.8%, Als content is 0.2%, ~0.8%, Sn content is 0.01%, ~0.05%, the invention obtains non-oriented silicon steel through composition control and process coordination, although the magnetic induction B5000 can reach 1.73T, but the iron loss of the product is higher, P 1.5 / 50 Reaching 3.2W / Kg, unable to meet the requirements of motor energy saving

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