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Development of Recycling of Alloyed Industrial Waste by Carbothermic Reduction with the Determination of Structural and Phase Composition of the Obtained Materials

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Abstract:

The structural-phase compositions of the alloy obtained through reduction melting with oxide waste use from the production of high-alloy steels and alloys with different charge compositions have been studied. It is crucial to determine the technological parameters that ensure the reduction of alloying element losses during the production and use of the alloying material. In the phase composition of the resulting alloy, a solid solution of alloying elements and carbon in the lattice of γ -Fe, Fe3C, as well as FeNi in the case of adding alloyed metal chips to the charge has been found.At the same time, a relative increase in the content of alloying elements in the studied areas of the alloy has been ensured (wt.%): Cr – from 1.84–32.90 to 0.59–43.98; Ni – from 1.41–20.74 to 4.24–45.02; Mo – from 0.35–1.30 to 0.00–11.89; W – from 0.00–0.08 to 0.00–21.37, respectively. This led to the formation of new phase structures containing refractory elements, presumably of carbide and intermetallic nature, which been observed in microstructural images. The proportion of residual carbon in the form of carbide component and residual unreacted reductant is aimed at providing the required reducing capacity during the alloy usage. The studies have identified new technological aspects of processing high-alloy industrial waste, resulting in a resource-efficient alloying material with the potential to partially replace standard ferroalloys in steel production.

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Periodical:

Materials Science Forum (Volume 1164)

Pages:

87-98

DOI:

https://doi.org/10.4028/p-1SsrDc

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Online since:

November 2025

Authors:

Bohdan Tsymbal, Artem Petryshchev*, Mykhailo Motrych, Olena Sharovatova

Keywords:

Microstructure, Recycling, Reduction Melting, Resource Saving, Scale, Swarf, Technological Waste, X-Ray Phase Research

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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