关键词: 冷轧无取向硅钢, 常化, 退火, 高频磁性能, 抗拉强度

Abstract: The cold-rolled non-oriented silicon steel (/%: 0.003C, 2.35Si, 0.22Mn, 0.011P, 0,002S, 0. 36Al, 0.003 0N) is cold-rolled to 0.35 mm sheet from 2. 3 mm hot-rolled plate normalized at 890 °C or 940 for 3 min. The effect of normalizing temperature and annealing process at 800 ~ 920 ℃ for 3 min on high frequency (400 Hz) magnetic properties and tensile strength of the steel has been tested and studied. Results show that with annealing at 830 ~ 920 °C the high frequency iron loss value P_10/400 is lowest, and with increasing annealing temperature the grain size increases and tensile strength of steel decreases; the optimum heat treatment process for the non-oriented steel is normalizing at 940 X. and annealing at 830 °C, in this case the tensile strength Rm, high frequency iron loss P_10/400 and magnetic induction J₅₀ of steel are respectively 565 MPa, 21. 5 W/kg and 1. 69 T.