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Integral Diffusion Model of the Kinetics of Growth of Nitrided Layer in Gas Nitriding of Armco Iron

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Metal Science and Heat Treatment Aims and scope

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.

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Authors and Affiliations

  1. Laboratoire de Technologie des Materiaux, Faculte G.M. & G.P., USTHB, Bab-Ezzouar, Algiers, Algeria

    Mourad Keddam

  2. Faculty of Material Sciences and Technology of the STU in Trnava, Trnava, Slovakia

    Peter Jurči

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  1. Mourad Keddam
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  2. Peter Jurči
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Correspondence to Mourad Keddam.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 36 – 44, March, 2021.

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Keddam, M., Jurči, P. Integral Diffusion Model of the Kinetics of Growth of Nitrided Layer in Gas Nitriding of Armco Iron. Met Sci Heat Treat 63, 148–155 (2021). https://doi.org/10.1007/s11041-021-00662-0

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  • DOI: https://doi.org/10.1007/s11041-021-00662-0

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