电工钢中{100}织构的演变规律

Evolution of microstructures and textures of {100} initial texture in an electrical steel

利用X射线衍射及EBSD取向成像技术考察了电工钢初始柱状晶组织在热轧、冷轧、退火过程中的组织及织构演变规律,分析了立方取向和旋转立方取向晶粒与其他取向晶粒的关系。结果表明,{100}面近似平行板法线的柱状晶组织热轧及冷轧时都较稳定,难以发生再结晶,退火后晶粒尺寸粗大。热轧时的表面剪切力和反复冷轧及退火会逐渐减弱这类组织及织构;退火次数越多,消除的效果越好。本文讨论了这类织构在电工钢中的作用及对磁性能的影响。

The evolution of microstructures and textures during hot rolling, cold rolling and annealing in an electrical steel containing initial columnar grains was studied by XRD and EBSD techniques. The rela- tionships among rotated cube orientation, cube orientation and other orientations were analyzed. The resuits showed that the columnar grain structure with the { 100 / being nearly parallel to the rolling plane was stable and was hard to recrystallize during both hot rolling and cold rolling. Coarse grain size was resulted after annealing. The shear stress on the surface during hot rolling and the repeated cold rolling followed by annealing weaken such microstructure and texture, and the more times it is rolled and annealed, the more effective this initial texture is weakened. The behavior and the influence of this kind of texture on the magnetic properties of electrical steel are discussed.