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Fe-3%Si电工钢铸锭中普遍存在柱状晶,其晶体学及形状各向异性对随后的热轧、冷轧及退火织构产生很大的影响.利用xRD与EBSD技术对长轴分别平行于轧面法向(ND),轧制方向(RD)和横向(TD)的柱状晶冷轧样品的织构及组织进行了研究,并对晶界的特殊作用进行了分析.结果表明,中等压下量下,3种柱状晶样品具有不同程度的{001}织构遗传性,即3种样品均不同程度的摆脱了{111}线织构的形成;柱状晶长轴平行于ND和TD时,{001}取向在冷轧时得到大的保留;柱状晶长轴平行于RD时,得到最强的{111}〈112〉织构;柱状晶长轴平行于TD时,冷轧组织中旋转立方织构及{111}〈110〉织构较强.此外,3种样品的织构均表现出由立方→{001}〈130〉→{113}〈251〉的过渡路径,与等轴多晶样品沿α线和γ线转动的路径不同.不同方向的柱状晶晶界对冷轧变形过程中晶粒转动的作用不同,但因晶粒尺寸大而作用有限,且与初始取向相关.
Columnar crystals are commonly found in Fe-3% Si electrical steel ingots, and their crystallographic and shape anisotropy have a great influence on the subsequent hot rolling, cold rolling and annealing texturing.Using xRD and EBSD techniques, The textures and microstructure of cold-rolled columnar grains parallel to the normal (ND), rolling (RD) and transverse (TD) of the rolling surface were studied and the special effects of the grain boundaries were analyzed. Under moderate reduction, the three kinds of columnar crystals have {001} texture inheritance, that is, the three kinds of samples all get rid of {111} line texture to some extent. The long axis of columnar crystals is parallel to ND and TD, the {001} orientation is greatly preserved during cold rolling. The strongest {111} <112> texture is obtained when the long axis of columnar crystals is parallel to RD. When the long axis of columnar crystals is parallel to TD, And the texture of {111} <110> is stronger.In addition, the texture of the three samples shows the transition path from cubic → {001} <130> → {113} <251> Axial polycrystalline samples rotate along the α-ray and the γ-ray with different paths.The columnar grain boundaries in different directions have different effects on the grain rotation in the cold-rolling deformation process, but they are affected by the large grain size Limit, and is associated with the initial orientation.