退火均热时间对Fe-3.2 %Si无取向硅钢铁损的影响研究

研究了连续退火均热时间对Fe-3.2 %Si高牌号无取向硅钢P1.0/50和P1.5/50铁损性能的影响规律。结果表明：随着退火均热时间的增加，P1.0/50和P1.5/50均呈现先降低再升高的趋势，P1.0/50在110 s时最低值为1.008 W/kg，而P1.5/50在90 s时最低值为2.601 W/kg；当退火均热时间从50 s增加到130 s时，平均晶粒尺寸从70 μm增加至164 μm。均热时间短，{110}〈001〉取向晶粒尺寸小、数量多，其织构组分强度高；随着均热时间增加，γ纤维和{100}〈0vw〉、{110}〈001〉强度增强，但增幅逐渐变缓。在退火温度1 000 ℃×90 s工艺下，Fe-3.2 %Si可获得较优异的，P1.0/50和P1.5/50铁损性能和均匀性高的材料组织。

Effect of annealing time on the iron loss of Fe-3.2 % Si non-oriented silicon steel

Based on high grade non oriented silicon steel with Si content of 3.2 % , the influences of annealing time on the iron losses of P1.0/50 and P1.5/50 were studied. The results showed that：with the increase of the annealing time，the iron losses of P1.0/50 and P1.5/50 decreased first and then increased. The iron loss P1.0/50 became the lowest, which was 1.008 W/kg, when the annealing time was 110 s. While the lowest iron loss P1.5/50 was 2.601 W/kg when the annealing time was 90 s. The average grain size increased from 70 μm to 164 μm as the annealing time increased from 50 s to 130 s. The {110}〈001〉 orientation grain was small and much with short annealing heat time,and its texture component strength was high.While when the annealing time increased, the strengths of γ-fiber texture,{100}〈0vw〉 and {110}〈001〉 were increased，but the increasing amplitude was gradually slowed down. At the annealing temperature of 1 000 ℃ and the time 90 s,the Fe-3.2% Si non-oriented silicon steel can obtain excellent properties of low iron losses of P1.0/50 and P1.5/50 and high homogeneity.