退火温度和再结晶比例对0.58Si无取向硅钢0.50mm冷轧板性能的影响

Effect of Annealing Temperature and Recrystallized Grain Rate on Properties of 0.50 mm Cold-Rolled Sheet of 0.58Si Non-Oriented Silicon Steel

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390~820℃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J_(50)1.70 T,综合性能最佳。

The 0. 5 mm cold-rolled sheet of non-oriented silicon steel （/% ： 0. 003C, 0. 58Si, 0. 20Mn, 0. 010P, 0. 002S, 0. 25A1, 0. 003 ON） is cold-rolled by 2. 6 mm hot-rolled plate. The effect of recrystallized grain rate in sheet an- nealed at 390 - 820 ℃ on magnetic performance, tensile strength and hardness of the steel has been studied. Results show that before crystallization of steel （ annealed at 390 - 480 ℃ ）, the effect of annealing temperature on tensile strength and hardness of steel is minor; as recrystallized grain rate is 〉70% （ annealed at 560 N 820 ℃ ）, decreasing annealing temper- ature is available to effectively increase tensile strength of steel while deterioration of steel＇s magnetic performance is no-ob- vious, but has no-effect on hardness of steel; as recrystallized grain rate is less than 70% （ annealed at 〉 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 ℃ with recrystallized grain rate 70% , the comprehensive properties of non-oriented silicon steel are best i.e. tensile strength Rm 470 MPa, HV1 hardness value 140, iron loss P 7.5 W/k and magnetic Dole intensity .L, 1.70 T.