CSP制无取向硅钢热轧、常化、冷轧织构的演变

运用EBSD和X射线衍射技术,研究了模拟CSP流程生产无取向硅钢在热轧-常化-冷轧过程中织构的演变。热轧板沿板厚方向应力场和温度场的差异导致由表至中织构锋锐度增高,织构类型存在明显变化,表层主织构为B类纤维织构,次表层为A类纤维织构,中心层为旋转立方织构{001}<110>。常化过程削弱了这种差异性,但中心层仍保留了一定强度的立方织构{001}<100>。冷轧板表层及中心层的主织构均为{112}<110>、{111}<112>,表层织构锋锐度较中心层的强。分析表明热轧、常化、冷轧织构的演变与基体初始织构、组织密切相关。表层、次表层热轧板织构经常化演化成散漫、分布较均匀的织构,中心层主要织构由{001}<-1-10>绕RD逆时针旋转45°演化至{001}<0-10>。冷轧后织构演变为以{223}<110>为主的B类织构和以{111}<112>为主的A类织构。

Evolution of Hot Rolled, Normalized and Cold Rolled Texture of Non-Oriented Silicon Steel Produced by CSP

By using EBSD and X-ray diffraction technology,evolution of hot rolled,normalized and cold rolled textures of non-oriented silicon steel produced by a simulation process of CSP was examined.The results show that the texture types along the thickness in the hot rolled strip are substantially different,including B-fibrous texture,A-fibrous texture and rotated cube texture of {001}<110> in the surface,subsurface and center layer of the hot rolled plate respectively.The difference is weakened in the normalizing process,but cube texture of {001}<100> with certain strength remains in the center layer of the normalized plate.Both surface and center layer of the cold rolled plate consist of B-and A textures with {223}<110> and {111}<112> as their major textures respectively.Analysis shows the evolution of texture is mainly determined by the initial texture and microstructure.