Abstract: The pilot production flow sheet for 300 mm x 300 mm bloom of steel EA1N (/%: 0. 32 ~0. 38C, 0. 15 ~0. 35Si, 0. 80 ~ 1. 10Mn, ≤0. 015P, ≤0.010S) for axle is 60 t EAF-LF-VD-8.4 t ingot casting-1 000 mm blooming mill breakdown process. With the process measures including EAF hot charging ≥70% pre-treating hot metal, EAF controlling end [ P] ≤008P and [C]≥O.10%, 10% heel liquid in tapping, refining with high basicity slag ( CaO)/( SiO₂) =4 ~ 7 and feeding Al wire to control [Al] s 0. 020% ~0. 040%, after VD process feeding 0. 5 kg/t Si-Ca wire and argon shielding ingot casting, the cleanliness of produced steel EA1N is [ O] ≤15 x 10^-6，[H] ≤1. 0 x 10^-6，[N] ≤80 x 10^-6, P ≤0. 015%, S ≤0. 005%, and inclusion rating of A, B, C and D series ≤1. 0； the technical indexes of bloom and axle of steel EA1N all meet specification requirement for axle of high-power electric locomotive.

摘要： 车轴用钢EAlN(/%:0.32~0.38C,0.15~0.35Si,0.80~1.10Mn,≤0.015P,≤0.010S)300 mm×300mm钢坯试制流程为60 t电弧炉-LF-VD-8.4 t铸锭-1 000 mm初轧机开坯工艺。通过EAF热装≥70%的预处理铁水,EAF控制终点[P]≤0.008%和[C]≥0.10%,出钢留钢10%,高碱度渣(CaO)/(SiO2)=4~7并喂Al线精炼,控制[Al]s 0.020%~0.040%,VD后喂0.5 kg/t Si-Ca线,氩气保护浇铸等工艺措施,使生产的EAlN钢的洁净度为[O]≤15×10-6,[H]≤1.0×10-6,[N]≤80×10-6,P≤0.015%,S≤0.005%,A、B、C、D类非金属夹杂物级别≤1.0,EAlN车轴钢坯和车轴技术指标符合大功率电力机车车轴的技术要求。