Impact law of typical special preparation techniques on texture of non-oriented electrical steel

Abstract

Electrical steel, also known as silicon steel, is an important special steel and is often referred to as the "work of art" among special steels. This is mainly due to the complexity of its processing and preparation processes, and the wide range of factors affecting its performance. One of the non-oriented electrical steel is mainly used in the rotating electromagnetic field environment, in order to obtain excellent soft magnetic properties, it is necessary to form a larger number of {100} and other texture, for which the researchers have carried out a lot of exploration. In recent years, some special preparation techniques on the formation of non-oriented are found out that electrical steel has a significant role in promoting the formation of a larger number of {100} and other texture. The effects of two-stage rolling, cross rolling, asymmetric rolling and twin-roll strip cast on the recrystallization structure of non-oriented electrical steel were summarized, and it is found that the two-stage rolling and twin-roll strip cast can enhance the λ and Gaussian texture and weaken the γ texture, the cross rolling also enhances the λ texture but has little effect on the γ texture, and the iso-speed asymmetric rolling enhances the η texture, but the iso-diameter asymmetric rolling has no effect on the recrystallization texture. The shortcomings of the current special preparation techniques are summarized and some development directions, such as generating more shear bands in conventional cold rolling with the help of the principle of shew rolling and utilizing asymmetric rolling to carry out secondary processing in order to homogenize the magnetic susceptibiltty, which provide more references for the subsequent industrial production of non-oriented silicon steel are put forward.

Keywords

• non-oriented electrical steel
• two-stage rolling
• skew rolling
• asymmetric rolling
• twin-roll strip cast