Effects of Production Process and Chemical Compositions on Magnetic Properties of Phosphorus-bearing Non- oriented Silicon Steel

Based on industrialization of low and medium grade non-oriented silicon steel,the effects of production process and chemical compositions on magnetic properties of phosphorus-bearing non-oriented silicon steel are investigated.The results show that phosphorus could restrain the recrystallization of hot rolled strips and decrease the grain size of finished steel sheets.Thus,phosphorus can remarkably influence magnetic properties of non-oriented silicon steel.For aluminum free steel,the magnetic induction changes little but the iron loss increases gradually with the increase of phosphorus before and after SRA.For aluminum-bearing steel,no matter the silicon content is high or low,the magnetic induction decreases rapidly and continuously with the increase of phosphorus under the same conditions.However,the effects of phosphorus content on the iron loss are gradually weakened with the increase of silicon content.After the intermediate annealing process,a small amount of phosphorus could effectively improve the magnetic induction but result in little iron loss.