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首页> 外文期刊>Journal of Iron and Steel Research International >Thermodynamic Calculation of Carbide Precipitate in Niobium Microallloyed Steels
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Thermodynamic Calculation of Carbide Precipitate in Niobium Microallloyed Steels

机译：铌微合金钢中碳化物沉淀的热力学计算

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摘要

On the basis of regular solution sublattice model, thermodynamic equilibrium of austenite/carbide in Fe-Nb-C ternary system was investigated. The equilibrium volume fraction, chemical driving force of carbide precipitates and molar fraction of niobium and carbon in solution at different temperatures were evaluated respectively. The volume fraction of precipitates increases, molar fraction of niobium dissolved in austenite decreases and molar fraction of carbon increases with decreasing the niobium content. The driving force increases with the decrease of temperature, and then comes to be stable at relatively low temperatures. The predicted ratio of carbon in precipitates is in good agreement with the measured one.
机译：在规则溶液亚晶格模型的基础上，研究了Fe-Nb-C三元体系中奥氏体/碳化物的热力学平衡。分别评估了溶液在不同温度下的平衡体积分数，碳化物沉淀的化学驱动力以及溶液中铌和碳的摩尔分数。随着铌含量的降低，析出物的体积分数增加，溶解在奥氏体中的铌的摩尔分数降低，碳的摩尔分数升高。驱动力随着温度的降低而增加，然后在相对较低的温度下变得稳定。沉淀物中碳的预测比例与测得的碳比例很好。

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