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.

摘要： 冷轧无取向硅钢(/%:0.003C,2.35Si,0.22Mn,0.011P,0.002S,0.36Al,0.003 0N)经890℃或940℃3 min常化的2.3 mm热轧板冷轧成0.35 mm薄板。研究了常化温度和800~920℃3 min退火对该钢高频(400Hz)磁性能和抗拉强度的影响。结果表明,830~920℃退火时高频铁损P_10/400值最低,随退火温度增加,晶粒尺寸增大,钢的抗拉强度降低;该钢的最佳热处理工艺为常化温度940℃,退火温度830℃,其抗拉强度R_m、高频铁损P_10/400和磁感应强度J₅₀分别为565 MPa,21.5 W/kg和1.69 T。

关键词: 冷轧无取向硅钢, 常化, 退火, 高频磁性能, 抗拉强度