Abstract

In order to investigate the thermodynamic interactions between Si and N in austenitic Fe, equilibrium experiments of Fe–Si foils and N₂ gas with controlled partial pressure were carried out at 1373, 1423 and 1473 K. Based on the equilibrium concentration of N in the Fe foil with different Si content, the first order interaction coefficient between Si and N in austenitic Fe could be determined in 1373–1473 K and its temperature dependency was found to be as follows. In the austenitic Fe, Si and N have a positive interaction coefficient value, which has a repulsive relationship with each other. Using interaction between Si and N, the precipitation behavior of various nitrides is to be predicted.

$$e_{{\text{N}}}^{{{\text{Si}}}} = \frac{199.5}{{\text{T}}} - 0.119$$

Graphic Abstract

中文翻译：

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1373–1473 K中凝固的奥氏体铁中硅和氮之间的相互作用

摘要

为了研究奥氏体Fe中Si和N之间的热力学相互作用，在1373、1423和1473 K下进行了Fe-Si箔和N ₂气体在受控分压下的平衡实验。具有不同Si含量的铁箔，可以在1373–1473 K中确定奥氏体Fe中Si与N之间的一阶相互作用系数，并且发现其温度依赖性如下。在奥氏体Fe中，Si和N具有正的相互作用系数值，这彼此具有排斥关系。利用Si和N之间的相互作用，可以预测各种氮化物的沉淀行为。

$$ e _ {{\ text {N}}} ^ {{{{\ text {Si}}}}} = \ frac {199.5} {{\ text {T}}}-0.119 $$

图形摘要