Abstract: The Φ210~310 mm round tube billet of gas bottle steels such as steel and steel 30CrMo and 37Mn are produced by 150 t EAF- 150 t LF(VD)- CC process at Tianjin Pipe Co.The production statistic data showed that during LF refining  using  ≥50Si,≥12Ca,≥13Ba  alloy  to  replace  total  aluminium  deoxidization,the  [Al_t]  decreased  to  0.006%  from 0.026%,the oxygen content in  steel was 25×10^-6,with the result that the cleanliness of steel increased and the  clack rejection rate decreased obviously.

Key words: Gas Bottle Steel,LF Refining,Si-Ca-Ba Alloy

摘要： 天津钢管公司采用150 t EAF-150 t LF(VD)-CC工艺生产30CrMo,37Mn等气瓶钢Φ210~310 mm圆管坯。生产统计数据表明,在LF精炼时用Si≥50%,Ca≥12%,Ba≥13%合金替代全用Al脱氧,使[Al_t]从0.026%降至0.006%,钢中氧含量为25×10^-6,提高了钢的清洁度,减少了轧制过程中钢材的裂纹废品。

关键词: 气瓶钢, LF精, 炼 Si-Ca-Ba合金, 脱氧