高压气瓶用钢4147 Φ500mm连铸圆坯的生产实践  

Production Practice of Φ500 mm Casting Round Bloom of Steel 4147 for High Pressure Cylinder

作　　者：李尚兵[1] 张新文[1] 薛伟江[1] 

机构地区：[1]江苏永钢集团有限公司技术研发中心,张家港215628

出　　处：《特殊钢》2016年第1期47-49,共3页Special Steel

摘　　要：永钢高压气瓶钢4147(/%:0.46~0.50C,0.15~0.35Si,0.8~1.0Mn,≤0.015P,≤0.008S,0.85~1.10Cr,0.15~0.25Mo,0.02~0.04Al)的冶炼工艺为110 t EBT电弧炉-LF-VD-Φ500 mm圆坯连铸。通过使用炉料80%铁水+20%废钢,控制(Pb+As+Sn+Sb+Bi)≤150×10^(-6),EAF终点[C]≥0.08%,终点[P]≤0.006%,并在出钢过程加1.0 kg/t Al;以及采用LF精炼合成渣(/%:40~55CaO,20~30Al_2O_3,≤6MgO,≤4.0SiO_2,≤1.5FeO),成品硫含量≤0.002%,T[O]≤17×10^(-6),[N]≤32×10^(-6),[H]≤0.9×10^(-6),(Pb+Sn+Sb+As+Bi)≤0.013 7%;连铸圆坯中心疏松、缩孔≤1.5级,轧材各类夹杂物均≤0.5级,满足高压气瓶钢质量要求。The steelmaking process of steel 4147 for high pressure cylinder（/%：0.46 ~0.50 C,0.15 ~0.35 Si,0.8~1.0Mn,≤0.015 P,≤0.008 S,0.85~1.10 Cr,0.15~0.25 Mo,0.02~0.04Al） at Yonggang is 110 t EBT EAFLF-VD-Φ500 mm round bloom CC.With using charging 80%hot metal ＋ 20%scrap to control（Pb ＋ As ＋ Sn ＋ Sb ＋ Bi）≤ 150×10^-6,controlling EAF end[C]≥0.08%and end[P]≤0.006%and adding 1.0 kg/t Al during tapping;using LF synthetic refining slag（/%：40~55 CaO,20~30 Al_2O_3,≤6MgO,≤4.0SiO_2,≤ 1.5 FeO）,the sulphur content in finished Uquid is ≤0.002%with T[O]≤17×10^-6,[N]≤32×10^-6,[H]≤0.9×10^-6,and（Pb ＋ Sn ＋ Sb ＋ As ＋Bi） ≤0.0137%;the rating of center porosity and shrinkage pipe of casting round bloom is ≤1.5,and the rating of each inclusion in rolled products is ≤0.5 to meet the requirement of quality for high pressure cylinder.

关 键 词：高压气瓶钢4147 Φ500 mm连铸圆坯 110t EBT EAF-LF-VD-CC流程 硫含量 气体含量 

分 类 号：TF76[冶金工程—钢铁冶金]