Investigation of the main factors affecting the magnetic properties of silicon steel sheets by comparing three kinds of silicon steel

As an important magnetic material, silicon steel is widespread used in various motors, generators, relays and transformers. It is of great significance to explore the factors affecting the magnetic properties of non-oriented silicon steel. This paper introduces the production process of 50W800, 50W600 and 35W550 non-oriented silicon steel, and compares their magnetic properties, observes the microstructure of silicon steel sheet under hot rolling, cold rolling and annealing three technological states, analyzes the influence of sheet thickness, composition, microstructure and impurity on the magnetic properties of non-oriented silicon steel. The results can be summarized as follows: (1) The magnetic properties of the silicon steel sheet can be improved to a certain extent by reducing the thickness of the silicon steel sheet.(2) Increasing silicon content in a certain range can reduce core loss of silicon steel. (3) After annealing, the grain size of cold rolled silicon steel sheet becomes larger, the defect of grain decreases, the loss of iron core decreases, and the finished silicon steel sheet with good magnetic properties is obtained.