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第4期 郭靖等:铝镇静钢钙处理后氧化铝夹杂物变性动力学模型 ·431· 力学模型,并通过热力学分析计算了模型参数,工业 ter Trans B,2005,36(1):67 实验验证了模型结果,根据模型可得出以下结论: B]Taguchi K,Ono-Nakazato H,Usui T,et al.Complex deoxidation (1)AL,0,夹杂物完全变性时间与其直径的二 equilibria of molten iron by aluminum and calcium./S/J Int, 2005,11(45):1572 次方成正比,随着A山,03夹杂物直径的增大,其完全 4]Lu D Z,Irons GA,Lu W K.Kinetics and mechanisms of calcium 变性为液态钙铝酸盐的时间急剧延长 dissolution and modification of oxide and sulphide inclusions in (2)钢液中Ca在一定范围内增加,不仅在热力 steel.Ironmaking Steelmaking,1994,21(5):362 学上有利于A山,03变性,也使其变性速率迅速增大, 5]ChengZJ,Guo J,Cheng SS.Inclusion composition control dur- 但Ca超过一定值时变性速率促进减弱.模型结果 ing LF refining for SPCC using FactSage combined with industrial trials.J Iron Steel Res Int,2013,20(2)14 表明钙处理质量分数为0.0020%时钙处理后静吹 Cai K K.Quality Control of Continuous Casting.Beijing:Metal- 时间应保证l5min以上,钙处理质量分数为 lurgical Industry Press,2010 0.0030%时可减少静吹时间到8min以上,可使 (蔡开科.连铸坯质量控制.北京:治金工业出版社,2010) AL,03夹杂物良好变性 7]Choudhary S K,Ghosh A.Thermodynamic evaluation of formation (3)温度升高不利于A山03夹杂物变性反应,从 of oxide-sulfide duplex inclusions in steel.IS/J Int,2008,48 (11):1552 而使变性的驱动力减小,对夹杂物的变性速率的促 8]The Japan Society for the Promotion of Science.Steelmaking Data 进作用不是十分显著 Sourcebook.New York:Gordon Breach Science Publishers, (4)数学模型结果和工业试验结果均表明,保 1988 证钢液合适的Ca含量和钙处理后的静吹时间,在 9]Elliott J F,Gleiser M,Ramakrishna V.Thermochemistry for Steel- LF精炼过程能够使夹杂物良好变性. making.2nd Ed.London:Addison-Wesley,1963 [10]Suito H,Inoue R.Thermodynamics on control of inclusions com- position in ultra-elean steels.IS/J Int,1996,36(5):528 参考文献 [11]Guo H J.Metallurgical Physical Chemistry Course.2nd Ed.Bei- [Ye G.Jonsson P,Lund T.Thermodynamics and kinetics of the jing:Metallurgical Industry Press,2010 modification of Al2O:Inclusions.ISI/Int,1996,36 (Suppl): (郭汉杰.治金物理化学教程.2版.北京:治金工业出版 S105 社,2010) 2]Park J H,Kim D S,Lee S B.Inclusion control of ferritic stainless 12] Kimura T,Suito H.Calcium deoxidation equilibrium in liquid steel by aluminum deoxidation and calcium treatment.Metall Ma- iron.Metall Mater Trans B,1994,25 (1)34第 4 期 郭 靖等: 铝镇静钢钙处理后氧化铝夹杂物变性动力学模型 力学模型,并通过热力学分析计算了模型参数,工业 实验验证了模型结果,根据模型可得出以下结论: ( 1) Al2O3 夹杂物完全变性时间与其直径的二 次方成正比,随着 Al2O3 夹杂物直径的增大,其完全 变性为液态钙铝酸盐的时间急剧延长. ( 2) 钢液中 Ca 在一定范围内增加,不仅在热力 学上有利于 Al2O3 变性,也使其变性速率迅速增大, 但 Ca 超过一定值时变性速率促进减弱. 模型结果 表明钙处理质量分数为 0. 0020% 时钙处理后静吹 时间 应 保 证 15 min 以 上,钙处理质量分数为 0. 0030% 时可 减 少 静 吹 时 间 到 8 min 以 上,可 使 Al2O3 夹杂物良好变性. ( 3) 温度升高不利于 Al2O3 夹杂物变性反应,从 而使变性的驱动力减小,对夹杂物的变性速率的促 进作用不是十分显著. ( 4) 数学模型结果和工业试验结果均表明,保 证钢液合适的 Ca 含量和钙处理后的静吹时间,在 LF 精炼过程能够使夹杂物良好变性. 参 考 文 献 [1] Ye G,Jnsson P,Lund T. Thermodynamics and kinetics of the modification of Al2O3 Inclusions. ISIJ Int,1996,36 ( Suppl) : S105 [2] Park J H,Kim D S,Lee S B. Inclusion control of ferritic stainless steel by aluminum deoxidation and calcium treatment. Metall Ma￾ter Trans B,2005,36( 1) : 67 [3] Taguchi K,Ono-Nakazato H,Usui T,et al. Complex deoxidation equilibria of molten iron by aluminum and calcium. ISIJ Int, 2005,11( 45) : 1572 [4] Lu D Z,Irons G A,Lu W K. Kinetics and mechanisms of calcium dissolution and modification of oxide and sulphide inclusions in steel. Ironmaking Steelmaking,1994,21( 5) : 362 [5] Cheng Z J,Guo J,Cheng S S. Inclusion composition control dur￾ing LF refining for SPCC using FactSage combined with industrial trials. J Iron Steel Res Int,2013,20( 2) : 14 [6] Cai K K. Quality Control of Continuous Casting. Beijing: Metal￾lurgical Industry Press,2010 ( 蔡开科. 连铸坯质量控制. 北京: 冶金工业出版社,2010) [7] Choudhary S K,Ghosh A. Thermodynamic evaluation of formation of oxide-sulfide duplex inclusions in steel. ISIJ Int,2008,48 ( 11) : 1552 [8] The Japan Society for the Promotion of Science. Steelmaking Data Sourcebook. New York: Gordon & Breach Science Publishers, 1988 [9] Elliott J F,Gleiser M,Ramakrishna V. Thermochemistry for Steel￾making. 2nd Ed. London: Addison-Wesley,1963 [10] Suito H,Inoue R. Thermodynamics on control of inclusions com￾position in ultra-clean steels. ISIJ Int,1996,36( 5) : 528 [11] Guo H J. Metallurgical Physical Chemistry Course. 2nd Ed. Bei￾jing: Metallurgical Industry Press,2010 ( 郭汉杰. 冶金物理化学教程. 2 版. 北京: 冶金工业出版 社,2010) [12] Kimura T,Suito H. Calcium deoxidation equilibrium in liquid iron. Metall Mater Trans B,1994,25( 1) : 34 ·431·
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