Abstract: A steel plant tried to develop an SPCC sheet based on ferritic rolling process, cold rolling and bell annealing. It was found that compared with the traditional austenite rolling process, the mechanical properties of the products under this process route were decreased in varying degrees, and the r value was significantly reduced. Then the microstructure and textures of hot rolled sheet and cold rolled annealed sheet with these two processing routes were compared and analyzed, and the improvement measures were put forward. The results show that in the ferrite rolling process, the hot rolling finishing temperature is too high to form two-phase zone rolling, resulting in the uneven room temperature microstructure of coarse F+fibrous F, so that resulting in the existence of high strength {001} <110> texture components in the cold rolled annealed sheet, which is the main reason for the reduction of r value of the final product.

Key words: low carbon aluminum-killed steel sheet, ferrite rolling, texture, plastic strain ratio r value