100t转炉-LF(VD)工艺冶炼轴承钢的氧含量控制  

Control of Oxygen Content in Bearing Steel GCr15 Steelmaking by 100 t Converter-LF(VD) Process

作　　者：刘跃[1] 吴伟[1] 刘浏[1] 赵继宇[2] 吴建鹏[2] 李小明[2] 王建国[2] 

机构地区：[1]钢铁研究总院工艺所,北京100081 [2]武汉钢铁集团公司,武汉430080

出　　处：《特殊钢》2005年第6期47-49,共3页Special Steel

摘　　要：通过铁水预脱硫-100 t顶底复吹转炉-吹Ar-LF(VD)-方坯连铸工艺生产轴承钢的实践,得出冶炼终点钢水碳含量为0.2%～0.6%时,钢水氧含量在50×10-6到150×10-6之间;经出钢时脱氧、吹氩、LF(VD)精炼后,中间包钢水中的全氧含量为(14～16)×10-6,铸坯中的全氧量＜12×10-6.分析表明,加强熔池搅拌,使钢渣充分反应,控制转炉下渣量＜5 kg/t钢,加强吹氩搅拌,控制LF顶渣碱度在2.0～2.5之间,(FeO)+(MnO)小于0.5%,可使轴承钢中全氧量进一步降低.Through practice of bearing steel producing by hot metal pre-desulfurization - 100t top and bottom combined blown converter - Ar stirring - LF（VD） - billet concasfing process, it was obtained that with melting end point carbon between 0.2% and 0.6%, the oxygen content in steel was between 50 × 10^-6 and 150 × 10^-6 , by deoxidation in tapping, Ar stirring and LF（VD） refining, the total oxygen content in molten steel in tundish was between 14 × 10^-6 and 16 × 10^-6 and was less than 12 × 10^-6 in cast billet. The analysis results show that it is available to further decrease the total oxygen contet in bearing steel by intensifying bath stirring to make steel-slag enough react, and controlling BOF tapping slag amount less than 5 kg/t steel, intensifying Ar stirring, and controlling LF top slag basicity between 2.0 and 2.5 and （FeO） ＋ （MnO） less than 0.5%.

关 键 词：100t顶底复吹转炉 轴承钢 氧含量 控制 顶底复吹转炉 含量控制 全氧含量 工艺生产 冶炼终点 100t 

分 类 号：TF711[冶金工程—钢铁冶金]