The final carbon content of austenite in equilibrium with tempered martensite can be estimated by the so-called constrained carbon equilibrium in the presence of carbide (CCEθ) model. However, the linear predictions under CCEθ deviate from both the initial and the experimentally measured carbon content. A modified approach to the CCEθ model is proposed, which predicts an increase of the carbon content in austenite with the decrease of temperature below the onset of martensitic transformation.

中文翻译：

---

碳化物沉淀伴随的平衡约束碳平衡

的最终碳含量的奥氏体平衡与回火马氏体能够通过在存在碳化物（CCE所谓受限碳平衡来估计θ）模型。但是，在CCE线性预测θ偏离初始和实验测量碳含量。一种改进的方法来CCE θ模型提出了一种预测在奥氏体中的碳含量与温度的马氏体相变的开始下面的减少的增加。