Centrifugal casting offers unique advantages, combining large centrifugal forces with directional solidification to minimize non-metallic inclusions in steel. This study investigates how calcium wire ladle treatment modifies and reduces these inclusions to improve machinability and mechanical performance. Using samples collected at various stages of treatment and final casting, inclusion analysis and mechanical testing were conducted. Results highlight that calcium addition after argon oxygen decarburization (AOD) is optimal for inclusion modification. However, centrifugal forces played a more dominant role in inclusion distribution, demonstrating the complementary effects of these processes. The findings indicate that a combination of chemical and mechanical treatments can significantly enhance steel cleanliness and mechanical reliability. Furthermore, recommendations are made for optimizing process parameters to achieve consistent production of high-quality steel.