Abstract: Against the backdrop of the carbon peaking and carbon neutrality goals, the optimization of magnetic properties of non⁃oriented silicon steel is pivotal for improving the energy efficiency of power equipment. In this paper, two types of non⁃oriented silicon steel with a thickness of 0.35 mm were taken as the research objects. Based on the iron loss separation model, the total iron loss was decomposed into hysteresis loss (Ph), eddy current loss (Pe) and anomalous loss (Pa), and the influence laws of grain size, microstructure homogeneity and recrystallization texture on each loss component were investigated. The results showed that compared with steel A having a smaller average grain size, a strong {001}<130> texture and a weak {111}<112> texture, the steel B with a larger average grain size, poor microstructure homogeneity and a strong {001}<120> texture exhibits a lower Ph but a higher Pa. This work elucidates the intrinsic correlation between microstructure and texture characteristics and iron loss components, and provides theoretical support for the microstructure and texture regulation as well as magnetic performance optimization of non⁃oriented silicon steels used under different operating frequencies.

Key words: non?oriented silicon steel, texture, hysteresis loss, anomalous loss, eddy current loss