0. 17Bi) has been developed to replace Pb free-cutting steel SUM24L. The flow sheet for production of Bi free-cutting steel is 40 t UHP EAF- 40 t LF (feeding Bi wire)-180 mm X 180 mm CC-continuous rolling process. Test results show that the distribution of inclusions in Φ9 mm coil of Bi free-cutting steel 1215M is homogeneous
and the cutting performance of Bi free-cutting steel 1215M is better than that of S free-cutting steel SUM23HS and is equal to Pb free-cutting steel SUM24L.