末端电磁搅拌参数对帘线钢72A铸坯中心碳偏析的影响  

Effect of F-EMS Parameters on Central Carbon Segregation of Cast Bloom of Tyre-cord Steel 72A

作　　者：谢文新 许晓红 

机构地区：[1]江阴兴澄特种钢铁有限公司,江阴214400

出　　处：《特殊钢》2010年第1期28-29,共2页Special Steel

摘　　要：帘线钢72A(%:0.71～0.72C、0.50～0.60Mn、0.22～0.30Si、≤0.010P、≤0.008S)的冶炼工艺流程为铁水预处理-LD-LF-RH-CC-200 mm×200 mm连铸。在连铸时钢水过热度10～20℃,拉速0.98 m/min,二冷比水量0.32 L/kg,结晶器冷却水220 m^3/h,结晶器电磁搅拌1.5 Hz、500 A的条件下进行了末端电磁搅拌(F-EMS)的工艺研究。结果表明,当离钢液弯月面8 m处以18 Hz、450 A进行F-EMS,可使帘线钢72A铸坯的中心碳偏析指数≤1.05。200 mm × 200 mm cast bloom of tyre-cord steel 72A （ % ： 9. 71≤0. 72C, 9. 50 - 9. 60Mn,9. 22 0. 30Si, ≤0. O10P, ≤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 electromag- netic 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.

关 键 词：帘线钢72A 方坯连铸 中心碳偏析 末端电磁搅拌 

分 类 号：TF777.2[冶金工程—钢铁冶金]