Abstract

The effect of ultra-fast (induction) heating of a commercial Fe–3% Si alloy strip (grain oriented electrical steel) at a rate of ~100°С/s on the magnetic properties of finished product is studied in this work. This heating is accomplished after cold rolling followed by recrystallizing decarburizing annealing. It is shown that, in parallel with a reference sample, the ultra-fast heating leads (1) after recrystallizing decarburizing annealing to an increase in the average ferrite grain and, within the near-surface layer, to an increase in the edge component of the {110}〈001〉 texture and decrease in the fraction of {111}〈112〉 component; (2) after the second cold rolling at the final stages of annealing before secondary recrystallization, to an increase in the sharpness of the {110}〈001〉 component; and (3) in the finished product, to a decrease in the average macrograin size by 1.5 times (from ~9 to ~6 mm) and a decrease in the average angle of deviation of easy magnetization axes 〈001〉 from the rolling direction from ~7° to ~6°. The magnetic properties of the studied material exceed those of the comparison metal in all cases. The effect of ultra-fast heating on the texture transformations in the alloy and the formation of the final properties are explained by different nucleation places of grains of different orientations upon primary recrystallization.

中文翻译：

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脱碳退火前的超快加热对商品Fe-3％Si合金的组织转变和性能的影响

摘要

在这项工作中，研究了以〜100°С/ s的速度对商用Fe-3％Si合金带（晶粒取向电工钢）进行超快（感应）加热对最终产品的磁性能的影响。该加热在冷轧之后进行，然后进行再结晶脱碳退火。结果表明，与参考样品平行，再结晶脱碳退火后的超快加热引线（1）导致平均铁素体晶粒的增加，并且在近表层内，其边缘成分的增加。 {110} 〈001〉纹理和{111} 〈112〉分量的减少；（2）在二次再结晶前的退火的最后阶段进行第二次冷轧之后，{110} 〈001〉成分的清晰度提高；（3）在成品中，使平均大晶粒尺寸减小了1.5倍（从〜9到〜6 mm），并且易磁化轴〈001〉相对于轧制方向的平均偏离角从〜7°减小到〜6°。在所有情况下，所研究材料的磁性能都超过了对比金属。超快速加热对合金组织转变和最终性能形成的影响，是通过初次再结晶时不同取向晶粒的不同成核位置来解释的。