Abstract: Based on theory of solubility of nitrogen in steel and de-nitriding kinetics, the control model of nitrogen alloying during AOD refining has been established. The application results for refining stainless steel 0Crl9Ni9N (≤0. 08C, 18 ~20Cr, 8 ~ 11Ni, 0. 10 ~0. 16N) by a 45 t AOD unit showed that it was available to accurately control N content in stainless steel by solubility of nitrogen and de-nitriding in AOD process and the data calculated by model nicely conformed to real measured data in production.

Key words: AOD, Nitrogen Alloying, Controlling Model

摘要： 根据氮在钢中的溶解热力学和脱除动力学理论,建立了AOD精炼氮合金化的控制模型。经45 t AOD装置精炼0Cr19Ni9N不锈钢(%:≤0.08C、18～20Cr、8～11Ni、0.10～0.16N)的应用结果表明,模型计算值与实测值吻合良好,可通过AOD氮气溶解和氩气脱除,精确控制不锈钢的N含量。

关键词: AOD, 氮合金化, 控制模型