{"id":5624,"date":"2025-12-01T20:51:34","date_gmt":"2025-12-01T17:51:34","guid":{"rendered":"https:\/\/jrn.isi.gov.ua\/?page_id=5624"},"modified":"2026-03-28T00:12:56","modified_gmt":"2026-03-27T21:12:56","slug":"doi-10-52150-2522-9117-2025-39-18","status":"publish","type":"page","link":"https:\/\/jrn.isi.gov.ua\/?page_id=5624&lang=en","title":{"rendered":"DOI: 10.52150\/2522-9117-2025-39-18"},"content":{"rendered":"\n

K. O. Chornoivanenko<\/strong>1,*<\/sup>, Ph. D. (Tech.), Assoc. Prof., ORCID 0000-0003-1613-7784
K. \u0406. Uzlov<\/strong>1<\/sup>, D. Sc. (Tech.), Professor, ORCID 0000-0003-0744-9890
Y. L. Povzlo<\/strong>1<\/sup>, ORCID 0009-0008-1432-8003<\/p>\n\n\n\n

1<\/sup>Ukrainian State University of Science and Technologies<\/em>, Lazariana St., 2, Dnipro, 49010, Ukraine<\/em><\/p>\n\n\n\n

* <\/sup><\/em>Corresponding author: vladimir.antonchik1958@gmail.com<\/em><\/p>\n\n\n\n

INFLUENCE OF DEFORMATION ON THE FORMATION OF COMPOSITE STRUCTURE DURING CARBURIZING OF CHROMIUM STEEL<\/strong><\/h2>\n\n\n\n

Abstract.\u00a0<\/strong>The initial state of the ferritic matrix in Fe-20% Cr chromium steel significantly affects the mechanisms of cooperative decomposition of ferrite into austenite and carbides during carburizing. As a result of the \u03b1\u2192\u03b3+C phase transformation, an austenite-carbide composite structure is formed, similar to a eutectoid structure. Studies have shown that deformation of samples prior to carburizing leads to a noticeable reduction in differentiation within austenite-carbide colonies. When carburizing an alloy pre-deformed to a 5% reduction, the grains in the carburized layer are finer compared to the as-cast state and are elongated in the direction of carbon diffusion. Increasing the degree of reduction to 50% before carburizing enhances the features of austenite-carbide layer formation described for the carburized sample deformed to 5%. Annealing of deformed samples results in the formation of secondary boundaries and the development of large equilibrium polyhedral grains, regardless of the degree of prior deformation. The influence of deformation and annealing on the morphology of the \u03b1\u2192\u03b3 transformation front was investigated. With increasing deformation, the curvature of the two-phase front becomes more pronounced; a flat interface between ferrite and austenite is almost never observed, and signs of protrusion nucleation are evident. The austenite\u2013ferrite interface in samples annealed after 5% deformation is mostly flat, whereas after 50% deformation, the interface is uneven. It is shown that during carburizing of chromium steel annealed after significant deformation, large and rare equilibrium faceted carbide inclusions are initially precipitated in ferrite, after which the \u03b1\u2192\u03b3+C phase transformation occurs partially abnormally \u2014 with the formation of conglomerate structures \u2014 and partially normally \u2014 with the formation of composite structures. The obtained results enable optimization of chemical-thermal, mechanical, and heat treatment parameters for targeted control of the microstructure and properties of chromium steels, which is important for improving their wear resistance, strength, and durability under operating conditions.<\/p>\n\n\n\n

Keywords: <\/strong>composite structure, carburizing, deformation, diffusion, annealing, chromium steel, recrystallization, transformation front.<\/p>\n\n\n\n

For citation:<\/strong> Chornoivanenko, K. O., Uzlov, K. I., & Povzlo, Y. L. (2025). Influence of deformation on the formation of composite structure during carburizing of chromium steel. Fundamental and applied problems of ferrous metallurgy,<\/em>\u00a039, 296-308. https:\/\/doi.org\/10.52150\/2522-9117-2025-39-18<\/a><\/p>\n\n\n\n

References<\/strong><\/p>\n\n\n\n

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  10. Chornoivanenko, K. O., & Povzlo, Y. L. (2025). Formuvannia kompozytnykh struktur pry nasychenni khromovykh stalei vuhletsem, XIX Mizhnarodna konferentsiia Stratehiia yakosti v promyslovosti i osviti<\/em>, Dnipro, Zhurfond, 131-138.<\/li>\n<\/ol>\n\n\n\n

    Received  19.07.2025<\/em>
    Accepted 21.10.2025<\/em>
    Published online 01.12.2025<\/em><\/p>\n\n\n\n

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    K. O. Chornoivanenko1,*, Ph. D. (Tech.), Assoc. Prof., ORCID 0000-0003-1613-7784K. \u0406. Uzlov1, D. Sc. (Tech.), Professor, ORCID 0000-0003-0744-9890Y. L. Povzlo1, ORCID 0009-0008-1432-8003 1Ukrainian State University of Science and Technologies, Lazariana St., 2, Dnipro, 49010, Ukraine * Corresponding author: vladimir.antonchik1958@gmail.com INFLUENCE OF DEFORMATION ON THE FORMATION OF COMPOSITE STRUCTURE DURING CARBURIZING OF CHROMIUM STEEL Abstract.\u00a0The initial state […]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-5624","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages\/5624","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5624"}],"version-history":[{"count":2,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages\/5624\/revisions"}],"predecessor-version":[{"id":5935,"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=\/wp\/v2\/pages\/5624\/revisions\/5935"}],"wp:attachment":[{"href":"https:\/\/jrn.isi.gov.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}