The kinetics of gas nitriding of Armco iron is studied using an integral diffusion model. A system of differential equations is used to calculate the thickness of the diffusion layers of ε- and (ε + γ′)-phases on the surface of saturated armco iron. The calculations do not allow for the incubation time, and the profile of the distribution of the concentration of nitrogen over the thickness of the nitrided layer is assumed to be nonlinear. The model is verified by comparing the values calculated within different kinetic approaches to experimental values of the thickness of nitrided layer. The effect of the nitriding potential on the kinetics of gas nitriding of Armco iron at 550°C is studied. The coincidence between the calculated and the experimental data is good.

使用积分扩散模型研究了 Armco 铁的气体渗氮动力学。一个微分方程组用于计算饱和 armco 铁表面上 ε- 和 (ε + γ')- 相的扩散层厚度。计算中没有考虑到孵化时间，并且氮浓度在氮化层厚度上的分布曲线被假定为非线性的。通过将不同动力学方法计算的值与氮化层厚度的实验值进行比较来验证该模型。研究了渗氮电位对 Armco 铁在 550°C 气体渗氮动力学的影响。计算数据与实验数据吻合较好。