高压气瓶用钢4147 Φ500 mm连铸圆坯的生产实践

特殊钢 ›› 2016, Vol. 37 ›› Issue (1): 47-49.

高压气瓶用钢4147 Φ500 mm连铸圆坯的生产实践

李尚兵，张新文，薛伟江

江苏永钢集团有限公司技术研发中心,张家港215628

收稿日期:2015-08-23 出版日期:2016-02-01 发布日期:2022-08-25
作者简介:李尚兵(1978-)，男，硕士(2007年重庆大学),工程师，特殊钢冶炼工艺与产品质量控制等。

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

Li Shangbing, Zhang Xinwen， Xue Weijiang

Technology Research and Development Center, Jiangsu Yonggang Group Co Ltd, Zhangjiagang 215628

Received:2015-08-23 Published:2016-02-01 Online:2022-08-25

摘要/Abstract

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,20~30Al₂O₃,≤6MgO,≤4.0SiO₂,≤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。

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

Abstract: The steelmaking process of steel 4147 for high pressure cylinder (/% : 0. 46 ~0. 50C, 0.15 〜0. 35Si, 0.8-1. OMn, ≤0. 015P, ≤0. 008S, 0. 85 ~ 1. lOCr, 0. 15 ~0. 25Mo, 0. 02 ~0. 04Al) at Yonggang is 110 t EBT EAF- LF-VD-Φ500 mm round bloom CC. With using charging 80% hot metal + 20% scrap to control (Pb + As + Sn + Sb + Bi) ≤150 x 10^-6 , controlling EAF end [C] NO. 08% and end [ P]≤ O. 006% and adding 1. 0 kg/t Al during tapping； using LF synthetic refining slag (/% : 40 ~55CaO, 20 ~ 30Al₂O₃, ≤6MgO, ≤4.0SiO₂, ≤1.5FeO), the sulphur content in finished liquid is <0.002% with T [O] ≤17 x 10^-6，[N] ≤32 x 10^-6, [ H]≤ 0. 9 x 10^-6, and (Pb + Sn + Sb + As + Bi) ≤0, 013 7% ； 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.

李尚兵, 张新文, 薛伟江. 高压气瓶用钢4147 Φ500 mm连铸圆坯的生产实践[J]. 特殊钢, 2016, 37(1): 47-49.

Li Shangbing, Zhang Xinwen, Xue Weijiang. Production Practice of Φ500 mm Casting Round Bloom of Steel 4147 for High Pressure Cylinder[J]. Special Steel, 2016, 37(1): 47-49.