冷轧压下率对无抑制剂取向硅钢初次再结晶退火的影响

Effect of reduction of cold rolling on primary recrystallization annealing of grain-oriented silicon steel without inhibitor

对无抑制剂取向硅钢不同压下率下初次再结晶退火后的显微组织、宏观织构和微观织构进行了研究。结果表明,冷轧板织构主要为α取向线{001}<110>、{112}<110>和{111}<110>织构以及γ取向线{111}<110>织构。初次再结晶退火后,α取向线织构减弱,织构主要为γ取向线{111}<112>织构。随冷轧压下率的增加,冷轧和初次再结晶织构强度增加。当压下率为88%时,初次再结晶退火后Goss织构和{111}<112>织构强度最高,最有利于发生二次再结晶。EBSD分析显示,Goss取向晶粒大多与{111}<112>取向晶粒相邻。提高冷轧压下率,Goss取向晶粒和{111}<112>取向晶粒都增加,Goss取向晶粒偏离理想取向角度减少。

The microstructures,macro-textures and micro-textures of grain-oriented silicon steel without inhibitor with three different reductions of cold rolling（88%,85% and 82%）were studied.The results indicate that the main textures areαfiber textures（{001}〈110〉,{112}〈110〉 and {111}〈110〉 texture）andγfiber{111}〈110〉 texture after cold-rolling.Thenαtextures decrease dramatically while{111}〈112〉texture is strengthened after primary recrystallization annealing.The intensities of cold-rolled textures and primary recrystallization textures increase with the increase of reduction of cold rolling.Under the reduction of cold rolling of 88%,the intensities of textures of Goss and{111}〈112〉 are the highest after primary recrystallization annealing,which is benefit for secondary recrystallization.The orientation maps indicate that Goss grains mainly nucleate around{111}〈112〉orientation grains.With the increase of reduction of cold rolling,both Goss and{111}〈112〉 oriented grains increase and the deviation from ideal Goss orientation of Goss grains decreases.