时速350 km中国标准动车组车轴用钢DZ2的生产工艺实践

特殊钢 ›› 2019, Vol. 40 ›› Issue (1): 19-22.

时速350 km中国标准动车组车轴用钢DZ2的生产工艺实践

王之香，高建兵，王玉玲，王育田，张锦文

山西太钢不锈钢股份有限公司技术中心，太原030003

收稿日期:2018-11-01 出版日期:2019-02-01 发布日期:2022-05-23
作者简介:王之香(1975-),女，硕士(2011年北京科技大学)，高级工程师,2000年鞍山科技大学(本科)毕业，车轴、齿轮材料研究。
基金资助:
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”

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

Wang Zhixiang,Gao Jianbing, Wang Yuling, Wang Yutian ， Zhang Jinwen

Technology Center , Shangxi Taigang Stainless Steel Co. , Ltd. , Taiyuan 030003

Received:2018-11-01 Published:2019-02-01 Online:2022-05-23

摘要/Abstract

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）/（SiO₂）=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[O]≤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6×10⁵ km的运用考核试验。

Abstract: 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) 250 mm x 250 mm is 80 t EBT EAF-LF-VD-8.4 t ingot casting-rolling mill practice. With the process measures including electric arc 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. 0 kg/t Si-Ca wire and argon shielding ingot casting, the cleanliness of produced steel DZ2 is [O] ≤ 10x 10^-6 , [ H]≤ 1. 0 x 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 DZ2 EMU Axle》,bloom and axle is past the step-up judging of the railway head office organizational, and finished 6 X 10⁵ km handle examine test.

王之香, 高建兵, 王玉玲, 王育田, 张锦文. 时速350 km中国标准动车组车轴用钢DZ2的生产工艺实践[J]. 特殊钢, 2019, 40(1): 19-22.

Wang Zhixiang, Gao Jianbing, Wang Yuling, Wang Yutian , Zhang Jinwen. Practice of Production Technology for 350 km/h Chinese Standard EMU Axle Steel DZ2[J]. Special Steel, 2019, 40(1): 19-22.