冷轧压下率对双辊铸轧硅钢形变和再结晶织构的影响

2.0 mm厚双辊铸轧Fe-2.8%Si-0.8%Al硅钢带坯进行直接冷轧和退火,研究了不同冷轧压下率样品的形变与再结晶织构特征.形变织构主要由α(110//RD),γ(111//ND)和λ(001//ND)纤维织构组分构成,其取向密度峰值分别位于{001}110,{111}110和{001}110~210.随压下率提高(40%~90%),各主要形变织构组分增强,压下率为60%时,剪切带特征最显著.再结晶织构包含Goss({110}001),Cube({001}100),λ,{113}361和{111}112等织构组分.随压下率提高,再结晶机制由剪切带形核主导转变为形变带和晶界形核主导,导致再结晶Goss组分减弱,而{113}361,Cube,λ以及{111}112再结晶织构组分增强.

Effect of Cold Rolling Reduction on Deformation and Recrystallization Texture in Twin-Roll Cast Non-oriented Silicon Steel

The twin-roll cast Fe-2.8%Si-0.8%Al strips were directly cold rolled and annealed to investigate the effect of cold rolling reduction on deformation and recrystallization texture. The deformation texture is mainly composed of α， γ and λ fibers with peak at 001<110>， 111<110> and 001<110>~<210>， respectively. The main deformation texture components are enhanced when the reduction increases from 40% to 90%， while the shear banding becomes the most notable feature at 60% reduction. The recrystallization texture is characterized by Goss， λ fiber， 113<361>， Cube and 111<112> components. The dominant nucleation sites transform from shear bands to deformation bands and grain boundary regions as the cold rolling reduction increases， resulting in the weakening of Goss and the strengthening of λ fiber， 113<361>， Cube and 111<112> components.