Abstract: In spring steel 60Si2MnA and 55CrSiA steelmaking by EAF-LF-VD, it is available to control [ Als ] ≤ 60 x 10^-6 , the total [O] (9 〜20) x 10^-6 , and get the rating of A series inclusion ≤0.5 , B series ≤0. 5 , C series ≤ 1. 5 and D series ≤0. 5 by adding 17 ~ 23 kg/t low aluminum ferrosilicon (Al content ≤0. 50% ) during EAF tapping, adding more 3 ~6 kg/t ferrosilicon during LF refining and controlling basicity of refining slag ≤2. 5. The molten steel produced by this deoxidation process has excellent castability being available for mass production.

Key words: Spring Steel 60Si2MnA, 55CrSiA, Non-Aluminum Deoxidation, Process Practice

摘要： EAF-LF-VD冶炼60Si2MnA和55CrSiA弹簧钢时EAF出钢过程加17～23 kg/t低铝硅铁(Al含量≤0.50%)脱氧,LF补加3～6 kg/t硅铁,并控制精炼渣的碱度≤2.5,可控制[Als]≤60×10^-6,总[O](9～20)×10^-6,A类夹杂级别≤0.5,B类≤0.5,C类≤1.5,D类≤0.5。用该脱氧工艺冶炼的钢水可浇注性强,适合大批量工业性生产。

关键词: 60Si2MnA、55CrSiA弹簧钢, 无铝脱氧, 工艺实践