Abstract:Tin-phosphor bronze cast billets are prone to anti-segregation phenomena during production, and internal holes-type defects may form. These defects in the subsequent cold rolling process are crushed and gradually transferred to the surface layer. The formation of peeling, delamination, and other defects seriously affect the surface quality of the tin-phosphor bronze strip. Given this problem, this paper adopted prefabricated holes to simulate casting defects. To study the "pre-roll-annealing" process to promote the feasibility of the healing of the hole defects, optical metallography (OM), scanning electron microscopy (SEM), electron backscattering diffraction (EBSD) and other methods were used to analyze the evolution of the holes during processing, It was found that the introduction of the recrystallization process can be effective in achieving the healing of the holes, which was classified into three kinds of healing forms according to the relationship between the position of recrystallized nuclei and the interface of hole closure. The research work presented in this paper can provide a reference for industrial production.