Abstract: The 0. 5 mm cold-rolled sheet of non-oriented silicon steel (/% : 0. 003C, 0. 58Si, 0. 20Mn, 0. 010P, 0. 002S, 0. 25Al, 0.003 ON) is cold-rolled by 2. 6 mm hot-rolled plate. The effect of recrystallized grain rate in sheet annealed at 390 ~ 820 °C on magnetic performance, tensile strength and hardness of the steel has been studied. Results show that before crystallization of steel (annealed at 390 ~ 480 °C) , the effect of annealing temperature on tensile strength and hardness of steel is minor; as recrystallized grain rate is ≥70% (annealed at 560 ~820) , decreasing annealing temperature is available to effectively increase tensile strength of steel while deterioration of steel's magnetic performance is no-obvious ,but has no-effect on hardness of steel; as recrystallized grain rate is less than <70% (>480 ~<560℃) , with decreasing annealing temperature the steel's magnetic performance deteriorates sharply, but the tensile strength and hardness of steel increase obviously; as the steel anneals temperature at 560 °C with recrystallized grain rate 70% , the comprehensive properties of non-oriented silicon steel are best i. e. tensile strength R_m 470 MPa, HV1 hardness value 140, iron loss P_1.5/50 7. 5 W/kg and magnetic pole intensity 1. 70 T.

摘要： 无取向硅钢（/%:0.003C,0.58Si,0.20Mn,0.010P,0.002S,0.25Al,0.003 0N）0.5 mm冷轧薄板由2.6mm热轧板冷轧而成。研究了390820℃退火再结晶组织比例对该钢磁性能、抗拉强度和硬度的影响。结果表明,未发生再结晶时（390~480℃退火）,退火温度对抗拉强度和硬度的影响很小;当再结晶组织比例≥70%时（560~820℃退火）,降低退火温度能够有效提高抗拉强度,同时不显著恶化磁性能,但对硬度没有影响;当再结晶组织比例<70%时（>480 ~<560℃退火）,降低退火温度使磁性能剧烈恶化,但能够大幅提高抗拉强度和硬度;当退火温度560℃,再结晶比例70%时无取向硅钢的性能为抗拉强度R_m 470 MPa,HV1硬度值140,铁损P_1.5/50 7.5W/kg,磁极化强度J₅₀ 1.70 T,综合性能最佳。