Non-oriented silicon steel for electric drive motor and production method thereof

Abstract

The invention discloses non-oriented silicon steel for an electric drive motor and a production method of the non-oriented silicon steel. The non-oriented silicon steel comprises the following components in percent by weight: 2.0 to 3.6 percent of Si, 0.6 to 1.0 percent of Al, 0.1 to 1.0 percent of Mn, 0.1 to 1.0 percent of Cr, no more than 0.005 percent of N, no more than 0.015 percent of S, no more than 0.003 percent of C, no more than 0.05 percent of P, and 0.14 to 0.17 percent of Creq. The production method comprises the steps of smelting by a vacuum furnace, casting into blanks, heating the cast blanks, rolling, reeling and entering into an insulation can to conduct furnace cooling, normalizing, pickling, cold-rolling at one time, annealing and cooling, coating and finishing routinely. The magnetic property of a finished product steel belt with the thickness of 0.35 mm or no more than 0.35 mm meets the conditions that P1.0/400 is lower than 18 W/kg, P1.0/1,000 is less than or equal to 76 W/kg, and B50 is higher than 1.62 T; the process is simple; the energy consumption is low; the magnetic property fluctuation range is small, the sensibility to the annealing process of the finished product is reduced; the stability is good; and the adaptive capacity of the process is strong.

Description

technical field [0001] The invention relates to the technical field of non-oriented silicon steel, in particular to a production method of non-oriented silicon steel for electric drive motors. Background technique [0002] The three major parts of the electric drive power system are the engine, the motor (also a generator) and the battery. The motor plays the role of driving and generating electricity, which is very important to the conversion efficiency and efficiency improvement of the system. The iron core of its core component is made of high Brand electrical steel products, in the next five years, there will be demand for production capacity of tens of millions of electric drives, and the demand for cold-rolled electrical steel will increase by 20%, reaching about 250,000 to 300,000 tons. [0003] When manufacturing a vehicle with a small interior space, the motor is required to be small and lightweight, and have the performance of low iron loss and high magnetic induct...

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Problems solved by technology

The literature adds the alloying element Sb, resulting in a higher cost of the alloy

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