60t BOF-LF-VD-CC流程生产齿轮钢20CrMnTiH的工艺实践

特殊钢 ›› 2011, Vol. 32 ›› Issue (4): 36-38.

60t BOF-LF-VD-CC流程生产齿轮钢20CrMnTiH的工艺实践

刘宗辉¹, 秦凤婷², 王红伟²

1 济源钢铁集团公司炼钢厂，济源454650；
2 济源职业技术学院，济源454650

收稿日期:2011-01-28 出版日期:2011-08-01 发布日期:2022-11-01
作者简介:刘宗辉( 1980-),男，硕士，工程师,2008年东北大学毕业. 特殊钢开发及工艺研究。

Process Practice of Production for Gear Steel 20CrMnTiH by 60 t BOF-LF-VD-CC Flow Sheet

Liu Zonghui¹, Qin Fengting², Wang Hongwei²

1 Steelmaking Plant, Jiyuan Iron and Steel Group Co Ltd, Jiyuan 454650.
2 Jiyuan Vocational and Technical College, Jiyuan 454650

Received:2011-01-28 Published:2011-08-01 Online:2022-11-01

摘要/Abstract

摘要： 济源钢铁公司生产齿轮钢20CrMnTiH的工艺路线为60 t顶底复吹转炉-LF(VD)-150mm×150mm方坯连铸工艺。通过控制转炉终点[C]≥0.08%,钢包进行硅钙钡-铝铁-铝粒复合脱氧,LF采用SiO₂-Al₂O₃-CaO渣系精炼,LF精炼时喂Ti-Fe线微调钢中Ti成分,VD真空处理后≥15min软吹,中间包液面自动控制,全保护浇铸、M-EMS和F-EMS电磁搅拌,使齿轮钢20CrMnTiH成品成分(%)为:0.19～0.21C、0.23～0.27Si、0.86～0.90Mn、1.11～1.15Cr、0.057～0.063Ti、≤0.020P、≤0.010S,钢中全氧含量为(5.6～19.3)×10^-6,氮含量为(40.6～65.2)×10^-6,各项检验指标达到标准要求,Φ32～40 mm钢材的J9 HRC值为34.42～39.10,△HRC≤6。

Abstract: The flow sheet for production of gear steel 20CrMnTiH at Jiyuan Iron and Steel Co is 601 top and combined blown converter-LF (VD) -150 mm x 150 mm billet concasting process. With controlling BOF end [ C] ≥0. 08%, using silicon-calcium-barium, ferro-aluminium and aluminium shot combined deoxidizing in ladle, LF refining by SiO₂-Al₂O₃ - CaO slag series and micro adjusting Ti content in liquid by feeding Ti-Fe wire during LF refining, soft argon blowing N15 min after VD vacuum treatment, auto controlling liquid surface in tundish, whole shielding casting and M-EMS and F-EMS stirring, the analysis of finished gear steel 20CrMnTiH is (%) 0. 19 ~0. 21C, 0, 23 ~ 0. 27Si, 0. 86 〜0. 90Mn, 1.11 〜 1. 15Cr, 0.057 ~ 0.063Ti, ≤0.020P, ≤0.010S, (5.6-19.3) x10^-6, (40.6 -65.2) x10^-6 and the J9 HRC value of 032 ~40 mm steel products is 34. 42 -39. 10, △HRC≤6, and all examination indexes meet the requirement of standard.

Key words: , Gear Steel 20CrMnTiH, BOF-LF-VD-CC Flow Sheet, Process Practice

刘宗辉, 秦凤婷, 王红伟. 60t BOF-LF-VD-CC流程生产齿轮钢20CrMnTiH的工艺实践[J]. 特殊钢, 2011, 32(4): 36-38.

Liu Zonghui , Qin Fengting , Wang Hongwei. Process Practice of Production for Gear Steel 20CrMnTiH by 60 t BOF-LF-VD-CC Flow Sheet[J]. Special Steel, 2011, 32(4): 36-38.