A thin strip of cerium-containing high-strength non-oriented silicon steel and its preparation method

Abstract

The invention relates to a cerium-containing high-strength non-oriented silicon steel strip and a preparation method thereof. The technical solution is: the chemical composition of the cerium-containing high-strength non-oriented silicon steel strip is: Si is 3.0-3.5wt%, Al is 0.5-1.0wt%, Mn is 0.1-1.0wt%, Ce is 0.01-0.03 wt%, the rest is Fe and unavoidable impurities; it is smelted according to the chemical composition of the cerium-containing high-strength non-oriented silicon steel strip, and cast into slabs at 1400-1550 °C, and the slabs are heated at 1200-1300 hot-rolled at ℃ to a hot-rolled sheet with a thickness of 0.8-1.5mm; then cold-rolled the hot-rolled sheet at room temperature to 0.1-0.3mm to obtain a cerium-containing non-oriented silicon steel strip; and then The cerium-containing non-oriented silicon steel thin strip is subjected to recrystallization annealing, and the cerium-containing high-strength non-oriented silicon steel thin strip is obtained. The invention has the characteristics of simple process, short production cycle and low preparation cost, and the prepared cerium-containing high-strength non-oriented silicon steel strip has high strength, low iron loss and high magnetic induction.

Description

technical field [0001] The invention belongs to the technical field of high-strength non-oriented silicon steel. Specifically relates to a cerium-containing 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 ...

AI Technical Summary

Problems solved by technology

Therefore, these two patent technologies are aimed at the problem of poor magnetic properties of low-grade non-oriented silicon steels with low Si content (less than 2wt%), and improve their magnetic properties by adding Ce, and do not involve high-grade non-oriented silicon steels ( Si content is greater than or equal to 3wt%), and it does not involve how to improve the strength of non-oriented silicon steel