超低氧弹簧钢脱磷回磷的热力学研究  

A Study on Thermodynamics of Dephosphorization and Rephosphorization of Ultra-Low Oxygen Spring Steel

作　　者：王郢[1] 李海波[1] 于会香[1] 周红霞[1] 郭佳 王新华[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《特殊钢》2008年第3期7-9,共3页Special Steel

基　　金：973新一代钢铁材料重大基础研究基金(2004C13619106)

摘　　要：采用80 t LD-LF-VD-CC流程生产超低氧弹簧钢(0.60%C、1.8%Si、0.8%Mn、5×10^(-6)O),对精炼过程脱磷回磷进行了热力学分析和研究。结果表明,碱度≥4,FeO+MnO≤1%高碱度低氧化性炉渣精炼弹簧钢时,回磷现象不可避免,但还原脱磷有可能发生。通过转炉挡渣出钢,保持精炼渣高碱度,精炼时避免强搅拌,在高碱低氧化性炉渣下,可有效减少精炼过程钢水回磷,可控制[P]为0.010%。The thermodynamics on dephosphorization and rephosphorizafion of an ultra-low oxygen spring steel （0. 60 C, 1.8Si, 0. 8Mn, 5 ×10^-6 O） during refining process with 80 t LD-LF-VD-CC flow sheet has been analyzed and studied. Results show that as spring steel refined by basieity ≥4, FeO ＋ MnO ≤ 1% high basieity low oxidation slag, the rephosphorization couldn＇t be avoided but the reduetive dephosphorization was likely to occur. With LD tapping by stopping slag, avoiding strongly stirring during refining, and using high basieity low oxidation slag, it is available to decrease liquid steel rephosphorization during refining and control 0. 010% [ P].

关 键 词：超低氧弹簧钢 LF精炼 脱磷 回磷 热力学 

分 类 号：TG142.15[一般工业技术—材料科学与工程]