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利用EBSD技术研究了电工钢中长轴平行于轧向的柱状晶样品在热轧和退火过程中组织和取向的演变规律,并与长轴平行于板法向的样品的已有研究结果进行对比。结果表明,无论柱状晶按何种方向排列,只要表面存在剪切力,热轧后都可形成剪切织构,同时中心形成轧制织构,主要包括旋转立方织构和{112}<1-10>。柱状晶造成的影响主要体现在板中心层,长轴平行于轧向排列的样品热轧时形成的粗大旋转立方晶粒要到脱碳退火后才能完全消除,但破坏了正常的不同取向晶粒间的取向差分布及尺寸均匀性,导致二次再结晶不完全及磁性能降低。
The evolution of microstructure and orientation during the hot rolling and annealing of the long axis parallel to the rolled columnar grain in electrical steel was studied by EBSD technique and compared with the existing research results of the sample with the long axis parallel to the plate normal . The results show that, no matter what direction the columnar crystals are arranged, as long as there is shear force on the surface, the shear texture can be formed after hot rolling, meanwhile, the rolling texture is formed in the center, including the rotational cubic texture and {112} <1 -10>. The influence of columnar crystals is mainly reflected in the central layer of the plate. The coarse rotating cubic grains formed during the hot rolling of the sample whose major axis is parallel to the rolling direction are not completely eliminated after the decarburization annealing, but destroy the normal grains with different orientations The difference between the orientation of the distribution and size uniformity, resulting in incomplete secondary recrystallization and magnetic properties decreased.