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首页> 外文期刊>High temperature materials and processes >Thermodynamic Analysis on the Minimum of Oxygen Content in the Deoxidation Equilibrium Curve in Liquid Iron
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Thermodynamic Analysis on the Minimum of Oxygen Content in the Deoxidation Equilibrium Curve in Liquid Iron

机译：液态铁脱氧平衡曲线中最小含氧量的热力学分析

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摘要

The minimum of oxygen content in the deoxidation equilibrium in liquid iron was thermodynamically analyzed in the present paper. Two criteria were developed to determine the existence of the minimum. The first criterion was 0 ≤ xγ_M~M + yγ_O_M ≤ min(x/4.606[%M]_(ex)~2, (xe_M~M + ye_O~M)~2 /3.474x) with xe_M~M + ye_O~M＜0, or xγ_M~m + yγ_O~M ＜0. And the second criterion was (xe_M~O + ye_O~O)+ γ/2.303[%O]_(ex)＞0. The criteria in terms of first-order activity interaction parameters were the special case of present thermodynamic analysis with neglecting the second-order activity interaction parameters. They were not fit for the case of xe_M~M + ye_O~M ＞ 0, in which case the criteria in terms of second-order activity interaction parameters should be taken into account to determine the existence of the minimum. The value 0.11 of e_(Si)~(Si) was smaller based on the existence of the minimum for the Fe-O-Si system. It was guaranteed that the minimum value of oxygen content on the deoxidation equilibrium curve existed at silicon content 20 mass%, when the value 0.32 of e_(Si)~(Si) was chosen, and the second-order activity interaction coefficients γ_(Si)~(Si) and γ_O~(Si) satisfied the condition γ_(Si)~(Si) + 2γ_O~(Si) = -1.54 × 10~(-3).
机译：本文通过热力学分析了铁水脱氧平衡中的最小氧含量。开发了两个标准来确定最小值的存在。第一个标准是0≤xγ_M〜M +yγ_O_M≤min（x / 4.606 [％M] _（ex）〜2，（xe_M〜M + ye_O〜M）〜2 /3.474x）xe_M〜M + ye_O〜 M ＜0，或xγ_M〜m +yγ_O〜M ＜0。第二个标准是（xe_M〜O + ye_O〜O）+γ/ 2.303 [％O] _（ex）＞ 0。关于一阶活性相互作用参数的标准是当前热力学分析的特例，而忽略了二阶活性相互作用参数。它们不适用于xe_M〜M + ye_O〜M＞ 0的情况，在这种情况下，应考虑二级活动相互作用参数的标准，以确定最小值的存在。基于Fe-O-Si体系存在最小值，e_（Si）〜（Si）的值0.11较小。保证当选择e_（Si）〜（Si）的值为0.32时，脱氧平衡曲线上的氧含量最小值存在于硅含量为20质量％时，二级活性相互作用系数γ_（Si ）〜（Si）和γ_O〜（Si）满足条件γ_（Si）〜（Si）+2γ_O〜（Si）= -1.54×10〜（-3）。

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