High-strength non-oriented silicon steel thin strip and preparation method thereof

Abstract

The invention discloses a high-strength non-oriented silicon steel thin strip and a preparation method thereof. According to the technical scheme adopted by the invention, the high-strength non-oriented silicon steel thin strip is prepared from the following chemical components in percentage by weight: 3.0-3.5wt% of Si, 0.5-1.0wt% of Al, 0.1-1.0wt% of Mn, 1.0-2.0wt% of Cu, 0.5-1.0wt% of Cr and thebalance of Fe and inevitable impurities. The preparation method for the high-strength non-oriented silicon steel thin strip comprises the following steps: smelting the chemical components of the high-strength non-oriented silicon steel thin strip, and pouring the chemical components into slab at a temperature of 1400-1550 DEG C, and performing hot-rolling at a temperature of 1100-1200 DEG C untilobtaining a hot-rolled plate with a thickness of 0.8-1.5 mm; performing normalizing treatment on the hot-rolled plate, and performing cold-rolling at the room temperature after normalizing treatmentuntil the thickness of the hot-rolled plate is 0.1-0.3 mm, thereby obtaining the non-oriented silicon steel thin strip; and performing recrystallization annealing on the non-oriented silicon steel thin strip to obtain the high-strength non-oriented silicon steel thin strip. The preparation method has the characteristics of a simple process and low cost; and the prepared high-strength non-orientedsilicon steel thin strip is great in strength, is low in iron loss, and is high in magnetic induction.

Description

technical field [0001] The invention belongs to the technical field of high-strength non-oriented silicon steel. Specifically relates to a high-strength non-oriented silicon steel strip and a preparation method thereof. [0002] technical background [0003] With the rapid development of economy and society, the performance requirements of new energy vehicles are getting higher and higher. Generally speaking, the stator of the driving motor is required to have good magnetic properties, and the rotor has high-strength mechanical properties. The production of the rotor requires precise machining, which will greatly increase the production cost of the iron core. From the perspective of cost reduction, it is more appropriate to use the same silicon steel plate to stamp the stator and rotor cores, which requires the development of non-oriented silicon steel plates with both magnetic and mechanical properties. [0004] As a non-oriented silicon steel plate for driving motors, th...

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Problems solved by technology

Although the magnetic properties of the prepared non-oriented silicon steel are better than those prepared in CN106282781B, the iron loss is still high, which cannot meet the performance requirements of new energy vehicles for non-oriented silicon steel sheets, and the Ni element is expensive, so the two The preparation costs of the patented technologies are relatively high