Normalization-free high-magnetic induction low-iron loss acid etching-resistant non-oriented silicon steel and production method thereof

Abstract

The invention relates to a normalization-free high-magnetic induction low-iron loss acid etching-resistant non-oriented silicon steel and a production method thereof. The normalization-free high-magnetic induction low-iron loss acid etching-resistant non-oriented silicon steel comprises the following components in percentage by weight: C less than or equal to 0.0050%, 0.30-2.50% of Si, 0.15%-0.80% of Mn, 0.25-0.80% of Al, P less than or equal to 0.050%, S less than or equal to 0.0050%, N less than or equal to 0.0050%, Ti less than or equal to 0.0050% and 0.20-0.45% of Sn+Cu, wherein Sn and Cu are not equal to 0.The production method comprises the following steps of: smelting and casting into a blank; heating and soaking the cast blank to 1080-1150 DEG C; carrying out conventional hot rolling; rolling; pickling; carrying out one-time cold rolling to the thickness of a finished product; and annealing. The normalization-free high-magnetic induction low-iron loss acid etching-resistant non-oriented silicon steel disclosed by the invention is low in Si alloying degree, achieves the P 1.5/50 to the level of medium-high grade non-oriented silicon steels and the magnetic induction B 5000 higher than that of common non-oriented silicon steels by more than 0.08 T and equivalent to that of high-magnetic induction non-oriented silicon steels with same iron loss grades, is very conductive to enhancing the stability of a motor operated in a harsh environment for a long time and prolonging the service life of the motor and can also reduce the rusting loss in producing, storing, transporting and using processes.

Description

technical field [0001] The invention relates to a non-oriented silicon steel and a production method thereof, specifically, it can produce a non-oriented silicon steel with lower loss, higher magnetic induction and a A new series of non-oriented silicon steel products with good acid corrosion resistance and their production methods. This product is very suitable for making all kinds of motors, especially all kinds of high-efficiency motor cores. It is beneficial to reduce the production and manufacturing costs of silicon steel, reduce the corrosion during storage, transportation and use, and improve the life and stability of motors in harsh environments. Background technique [0002] Before the present invention, ordinary cold-rolled non-oriented silicon steel was widely used in the market, which was difficult to adapt to the development of electromechanical industry and iron core manufacturing technology. In the late last century, countries and enterprises with advanced si...

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Problems solved by technology

Although the above-mentioned products have achieved low iron loss and high magnetic induction, the overall alloying degree of each grade of steel, especially the Si content, is still relatively high, and the normalizing annealing process of hot-rolled sheets must be added in the production process to en

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