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利用工业试验和OM、SEM和EBSD等研究了830℃和860℃终轧温度下50W600无取向硅钢组织结构的演变规律及成品电磁性能。结果表明,提高终轧温度有利于促进热轧板特别是其心部的再结晶和晶粒长大,促进退火冷轧板的晶粒长大。50W600无取向硅钢在热轧—冷轧—退火过程中的织构演变规律主要为高斯织构{110}<001>→{112}<110>、{001}<110>和{111}面纤维织构→{111}面纤维织构。终轧温度从830℃提高到860℃,一方面减弱了热轧板中的{111}面纤维织构组分,另一方面增强了冷轧板中的{111}面纤维织构组分并减弱了其{001}<110>织构组分,最终促进退火冷轧板中对磁性有害的{111}面纤维织构组分减弱和对磁性有利的{001}<110>织构组分增强。提高终轧温度有利于无取向硅钢的铁损降低和磁感应强度提高。
The evolution of the microstructures of 50W600 non-oriented silicon steel at 830 ℃ and 860 ℃ finishing temperature and the electromagnetic properties of the finished product were investigated by means of industrial tests, OM, SEM and EBSD. The results show that increasing the finishing temperature can promote the recrystallization and grain growth of the hot-rolled sheet, especially its core, and promote the grain growth of the annealed cold-rolled sheet. The texture evolution of 50W600 non-oriented silicon steel during hot rolling-cold-rolling-annealing mainly includes Gaussian texture {110} <001> → {112} <110>, {001} <110> and {111} Texture → {111} surface fiber texture. The finishing temperature increased from 830 ℃ to 860 ℃. On the one hand, the {111} plane fiber texture components in the hot-rolled sheet were weakened and the {111} plane fiber texture components in the cold- Weakens the {001} <110> texture component, and finally promotes the reduction of the magnetically harmful {111} plane fiber texture component and the magnetically favorable {001} <110> texture component in the annealed cold- Enhanced. Increasing the finishing temperature is conducive to the reduction of iron loss and the improvement of magnetic induction strength of non-oriented silicon steel.