时速350 km中国标准动车组车轴用钢DZ2的生产工艺实践  

Practice of Production Technology for 350 km/h Chinese Standard EMU Axle Steel DZ2

作　　者：王之香[1] 高建兵[1] 王玉玲[1] 王育田 张锦文[1] Wang Zhixiang;Gao Jianbing;Wang Yuling;Wang Yutian;Zhang Jinwen(Technology Center ,Shangxi Taigang Stainless Steel Co.,Ltd.,Taiyuan 030003)

机构地区：[1]山西太钢不锈钢股份有限公司技术中心,太原030003

出　　处：《特殊钢》2019年第1期19-22,共4页Special Steel

基　　金：国家重点研发计划资助项目(2017YFB0304603)"高寒地区用高韧性耐疲劳高速车轴钢关键制造与应用技术"

摘　　要：时速350 km中国标准动车组车轴用钢DZ2(/%:0. 24～0.32C,0.20～0.40Si,0.60～0.90Mn,0.90～1. 20Cr,0. 50～1. 50Ni,0. 20～0. 30Mo,≤0. 010P,≤0. 010S)250 mm×250mm钢坯试制流程为80 t EBT电弧炉-LFVD-浇铸8.4 t钢锭-轧制工艺。通过电弧炉热装≥80%的预处理铁水,电弧炉控制终点[P]≤0. 006%和[C]>0. 10%,出钢留钢10%,LF高碱度渣(CaO)/(SiO_2)=9～12精炼,控制白渣时间20 min以上,VD后喂1. 0 kg/t的Si-Ca线,氩气保护浇铸等工艺措施,使生产的DZ2钢的洁净度为[0]≤10×10^(-6),[H]≤1.0×10^(-6),P≤0.008%,S≤0.005%,A、B、C、D、Ds类非金属夹杂物级别≤1.0,DZ2车轴钢坯和车轴技术指标符合TJ/CL520-2016《动车组用DZ2车轴暂行技术条件》的技术要求,钢坯及车轴已通过铁路总公司组织的上车评审,并完成6×10~5 km的运用考核试验。The pilot production flow sheet of the 350 km/h Chinese Standard EMU DZ2 Axle Steel (/%:0.24- 0.32C,0.20-0.40Si,0.60-0.90Mn,0.90-1.20Cr,0.50-1.50Ni,0.20-0.30Mo,≤0.010P,≤0.010S)250mm × 250mm is 80t EBT EAF-LF-VD-8.4t ingot casting-rolling mill practice.With the process measures including electric are furnace hot charging >80% pre-treating hot metal,EBT electric arc furnace controlling end [P]≤0.006% and[C] > 0.10%,10% heel liquid in tapping,refining of with LF high basicity slag (CaO)/(SiO2)=9-12 and white slag hour with twenty minute upwards,after-VD process feeding 1.0kg/t Si-Ca wire.and.argon shielding ingot casting,the cleanliness of produced steel DZ2 is [O]≤10×10^-6,[H]≤1.0×10^-6,P≤0.008%,S≤0.005%,and inclusion rating of A,B,C,D and Ds series ≤1.0,the technical indexes of bloom and axle of steel DZ2 all meet TJ/CL520-2016《Tentative specifications of DZ2EMU Axle》,bloom and axle is past the step-up judging of the railway head office organizational,and finished 6×10^5 km handle examine test.

关 键 词：中国标准动车组 车轴用钢DZ2 EBT电弧炉-LF-VD 生产工艺实践 

分 类 号：TF777[冶金工程—钢铁冶金] TG335[金属学及工艺—金属压力加工]