硅钢极薄带三次再结晶退火过程中的组织演化

Structure development of ultra-thin silicon steel sheet in annealing

采用异步轧制方法将成品工业取向硅钢板冷轧到0.10mm,然后在氢气热处理炉中进行三次再结晶高温退火,研究异步轧制硅钢极薄带退火过程中的再结晶过程。结果表明,硅钢极薄带在800℃退火时发生初次再结晶,晶粒取向主要为高斯取向,磁感低;900℃时初次再结晶中极少数晶粒突然长大而发生二次再结晶,对0.1mm的极薄带不能形成完善的高斯织构,磁性能下降;在1200℃时在合适的退火条件下可以发生三次再结晶,在极薄带中获得了取向集中的高斯织构和优异的磁性能。

It is a new procedure to produce ultra-thin silicon steel sheet by cross shear rolling and tertiary recrystallization annealing. The commercial grain oriented silicon steel sheet of 0.3 mm was rolled to 0.1 mm by cross shear rolling. The grain-oriented silicon steel strips were annealed in a furnace at different temperatures for recrystallizing. Study on texture development of the tertiary recrystallization in the ultra-thin grain-oriented silicon steel sheet was investigated. The results show that primary recrystallization occurs in the ultra-thin grain-oriented silicon steel sheet at 800°C. The recrystallized texture ({110} ) formed in the silicon steel strip, and its magnetic property is poor. As temperature increasing up to 900°C, few grain grows to chaotic textures and secondary recrystallization in the silicon steel strip occurs. The magnetic property of the silicon steel strip is decreased. Annealing at 1200°C, the tertiary recrystallization in the silicon steel strip occurs and sharp {110} texture forms and excellent magnetic properties are obtained.