普通取向硅钢轧制过程中组织和织构的演变

借助电子背散射衍射(EBSD)及ZEISS-200MAT金相显微镜对某钢厂普通取向硅钢(CGO)进行研究,研究结果表明:热轧板组织、织构沿板厚方向存在明显的不均匀性,在热轧板表层及次表层发生再结晶,同时存在强度较高的Goss织构,中心层存在较强的{001}110变形织构。冷轧组织均呈纤维状条带组织,一次冷轧后,热轧板中的Goss织构消失,织构主要为α、γ织构,经中间脱碳退火后,α、γ织构强度减弱,并出现一定强度的Goss织构和利于Goss织构发展的{554}225、{332}113等织构,经二次冷轧后,二次冷轧织构类型与一次冷轧织构一致,但织构强度不同。

Evolutions of Microstructures and Textures in Grain-Oriented Silicon Steel During Rolling Process

The grain-oriented silicon steel produced by a steel factory was investigated by EBSD and ZEISS-200MAT metallographic microscope. The results show that the textures and microstructures along thickness of hot rolled slab are inhomogeneous. The surface layer and the layer near that are recrystallized structure which has a high Goss texture, but there is deformation texture {001}<110> in the central layer. The structure after cold rolling is a structure like fiber strip. After the first cold rolling, the Goss texture of hot rolled slab disappears, and the cold rolled texture is mainly ?? texture and ?? texture. Furthermore, after decarburizing annealing, the orientation densities of ?? texture and ?? texture are weaker, and there are Goss texture and some {554}<225> and {332}<113> textures which are beneficial to development of Goss texture. After the second cold rolling, the texture type is the same as that after first cold rolling, but the orientation densities of textures are different.