Abstract: In order to find the reasons for the fluctuation of magnetic properties in the head and tail during the industrial production of nonoriented silicon steel，the microstructure and texture were analyzed by OM, XRD and EBSD techniques. The results showed that: (1)because of the temperature fluctuation, the closer to the tail, the banded structure was more serious, and the banded structure still existed in the core at 25 m from the tail; (2) the average grain size of the head and tail of the strip steel was smaller than that of the middle 7~10 μm, which is the direct cause of the reduction in iron core loss of the head and tail; (3) compared to the middle of the strip steel, the unfavorable texture {111}〈112〉 of the head specimen was reduced by 2.8 %, but the favorable texture {100}〈010〉 was also reduced by 1 %,which resulted in a small difference in magnetic flux density. 

Key words: nonoriented electrical steel, magnetic properties, microstructure, texture