Abstract: Based on the actual production conditions of non⁃oriented silicon steel, this paper explored the influence of carbon content on the electromagnetic properties of non⁃oriented silicon steel, revealed the key issue that excessive carbon content leads to an increase in iron loss and a decrease in magnetic flux density, and formulates corresponding solutions and preventive measures. According to the actual production of 50W1300 and the results of electromagnetic properties and hardness tests of the products, it can be known that when the carbon content exceeds 0.005 %, the iron loss value P1.5/50 increases from 5.653 W/kg to 6.422 W/kg, an increase of 13.60 %. The magnetic induction intensity B50 decreases from 1.766 T to 1.742 T, a reduction of 1.36 %. At the same time, the hardness of the finished product rises from HV105 to HV129, an increase of 22.86 %. In response to this problem, optimization strategies for the steelmaking and cold rolling annealing processes were formulated, successfully solving the situation that the low electromagnetic properties and the high hardness of the products due to excessive carbon content.

Key words: non?oriented silicon steel, carbon content, electromagnetic properties, process optimization