200 mm x 200 mm cast bloom of tyre-cord steel 72A (% : 0. 71 ~ 0. 72C
0. 50 〜0. 60Mn
0. 22 〜 0. 30Si
≤0. 010P
≤0. 008S) is melted by hot metal pretreatment-LD-LF-RH-CC process flow sheet. During casting in conditions of liquid overheat 10 ~20℃
cast speed 0. 98 m/min
secondary cooling water ratio 0. 32 L/kg
mold cooling water rate 220
m3
/h and mold electromagnetic stirring (EMS) with 1. 5 Hz and 500 A
the study of final mold electromagnetic stirring (F-EMS) process parameters are carried out. Results show that as the F-EMS is carried out at distance from liquid meniscus- 8 m with 18 Hz and 450 A
the central carbon segregation index of cast bloom of tire-cord steel 72A is ≤1.05.