Calculation Model of Optimal Basicity for the Refining Slag of Bearing Steel Based on IMCT Theory
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摘要: 针对轴承钢精炼过程中全氧含量的控制问题,基于熔渣分子与离子共存理论(IMCT),建立了CaO-SiO2-MgO-Al2O3-FeO精炼渣系在1 853 K时炉渣最适碱度的计算模型,并对该渣系最适碱度的影响因素进行了讨论分析。结果表明:①在不同的FeO含量时,NFeO均在碱度为3左右时出现最大值,最适碱度基本不随FeO含量的变化而改变。②MgO含量对最适碱度有较大的影响。随着MgO含量的增加,最适碱度呈减小的趋势。③Al2O3含量对最适碱度的影响与MgO相反,随着Al2O3含量的增加,最适碱度明显增大。Abstract: The fatigue life of bearing steel is closely related to the total oxygen content in the steel.Aimming at the control of T[O]in the bearing steel during refining process,a calculation model of optimal basicity for the refining slag CaO-SiO2-MgO-Al2O3-FeO at 1 853 K is established,based on the ion and molecule coexistence theory(IMCT).And the influence factors on optimal basicity for the slag system are discussed and analyzed.The results show that:①For different FeO content,the maximum value of NFeO occured when the basicity are all around 3,the optimal basicity basically does not change with the variation of FeO content.②The content of MgO has a great influence on the optimal basicity,with the increase of MgO content,the optimal basicity decreased.③The effect of Al2O3 content on the optimal basicity is opposite to that of MgO.With the increase of Al2O3 content,the optimal basicity increases significantly.
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Key words:
- bearing steel /
- refining slag /
- coexistence theory /
- optimal basicity /
- calculation model
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