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Mechanism and Peculiarities of Formation of Diffusion Coatings Based on Carbide-Forming Elements on Steel Surfaces in the Medium of Fusible Liquid-Metal Solutions

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Abstract

Interaction between the elements of a coating with the elements in the composition of the coated steel is found to influence the mechanism and kinetics of formation of diffusion coatings deposited in the medium of fusible liquid-metal solutions. Two peculiarities of the deposition of diffusion coatings on steel are described. The first is intensive diffusion of carbon from steel to the outer layers of the coating and hindered diffusion of the coating elements into the base material in the case of coatings made of carbide-forming elements. The second feature met in coatings based on carbide-forming elements is that the hindering action of carbon depends on the amount of carbon in steel, thermal stability of carbides of the elements of the coating, and temperature and duration of the process. The structure of the arising coating contains the adsorbed layer, carbide layer, intermediate zone, and carbon-depleted zone. The scheme of creating of the diffusion coatings of carbide-forming elements is presented. Formulas for calculating the diffusion flows and the coating thickness are given; variants of coating formation at different diffusion flows are described.

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Funding

This innovative project was supported by the Kuban Scientific Fund in the slope of the Competition of scientific innovative projects oriented to the commercial application (no. NIP-20.1-62/20).

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Authors and Affiliations

  1. Kuban State Technological University, 350000, Krasnodar, Russia

    A. G. Sokolov & E. E. Bobylev

  2. Armavir Institute of Mechanics and Technology, branch of Kuban State Technological University, 352905, Krasnodar, Russia

    I. D. Storozhenko

Authors
  1. A. G. Sokolov
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  2. E. E. Bobylev
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  3. I. D. Storozhenko
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Corresponding author

Correspondence to E. E. Bobylev.

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Translated by S. Efimov

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Sokolov, A.G., Bobylev, E.E. & Storozhenko, I.D. Mechanism and Peculiarities of Formation of Diffusion Coatings Based on Carbide-Forming Elements on Steel Surfaces in the Medium of Fusible Liquid-Metal Solutions. Steel Transl. 53, 37–41 (2023). https://doi.org/10.3103/S0967091223010114

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  • DOI: https://doi.org/10.3103/S0967091223010114

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