高温退火气氛对薄规格中温取向硅钢二次再结晶行为的影响

发布时间：2018-05-04 23:06

本文选题：取向硅钢 + 薄规格　；参考：《金属学报》2016年01期

【摘要】：通过调整最终退火保护气氛来控制0.18 mm厚含Cu中温取向硅钢二次再结晶时抑制剂的熟化和分解行为,从而达到提高二次再结晶后Goss织构锋锐度和磁性能的目的.运用EBSD系统观察和分析二次再结晶中断抽出试样的组织和取向.结果表明:提高高温退火气氛中的N_2比例至90%,最终0.18 mm规格成品磁感达1.95 T.成品减薄后样品中抑制剂的粗化行为受气氛的影响更为强烈,表现在提高N2比例后初次晶粒尺寸减小,二次再结晶持续时间延长,此时Goss取向晶粒拥有足够的时间发生异常长大以获得尺寸优势,从而抑制偏转Goss取向晶粒的异常长大,提高了Goss织构的锋锐度和薄规格成品的最终磁性能.
[Abstract]:By adjusting the final annealing atmosphere to control the ripening and decomposition behavior of the inhibitor during secondary recrystallization of 0.18mm thick Cu-containing medium-temperature oriented silicon steel, the sharpness and magnetic properties of Goss texture after secondary recrystallization can be improved. EBSD system was used to observe and analyze the microstructure and orientation of the secondary recrystallization sample. The results show that the magnetic inductance of 0.18 mm standard finished product can reach 1.95 T by increasing the ratio of NSC2 to 90 in high temperature annealing atmosphere. The coarsening behavior of the inhibitors in the sample is more strongly affected by the atmosphere after the product is thinned. The initial grain size decreases and the duration of secondary recrystallization is prolonged when the N _ 2 ratio is increased. At this point, the Goss orientation grain has enough time to grow abnormally to obtain the size advantage, thus the abnormal growth of the deflected Goss orientation grain can be restrained, and the edge sharpness of the Goss texture and the final magnetic properties of the thin specification product can be improved.
【作者单位】：北京科技大学材料科学与工程学院;
【基金】：国家高技术研究发展计划资助项目2012AA03A505~~
【分类号】：TG161;TG142.1

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