退火均热时间对Fe-3.2%Si无取向硅钢铁损的影响研究

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

研究了连续退火均热时间对Fe-3.2%Si高牌号无取向硅钢P_(1.0/50)和P_(1.5/50)铁损性能的影响规律。结果表明:随着退火均热时间的增加,P_(1.0/50)和P_(1.5/50)均呈现先降低再升高的趋势,P_(1.0/50)在110 s时最低值为1.008 W/kg,而P_(1.5/50)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70μm增加至164μm。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}〈0 vw〉、{110}〈001〉强度增强,但增幅逐渐变缓。在退火温度1000℃×90 s工艺下,Fe-3.2%Si可获得较优异的,P_(1.0/50)和P_(1.5/50)铁损性能和均匀性高的材料组织。

Based on high grade non-oriented silicon steel with Si content of 3.2%,the influences of annealing time on the iron losses of P_(1.0/50) and P_(1.5/50) were studied.The results showed that:with the increase of the annealing time,the iron losses of P_(1.0/50) and P_(1.5/50) decreased first and then increased.The iron loss P_(1.0/50) became the lowest,which was 1.008 W/kg,when the annealing time was 110 s.While the lowest iron loss P_(1.5/50) was 2.601 W/kg when the annealing time was 90 s.The average grain size increased from 70μm to 164μm 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 ofγ-fiber texture,{100}〈0 vw〉and{110}〈001〉were increased,but the increasing amplitude was gradually slowed down.At the annealing temperature of 1000℃and the time 90 s,the Fe-3.2%Si non-oriented silicon steel can obtain excellent properties of low iron losses of P_(1.0/50) and P_(1.5/50) and high homogeneity.