Identification of the features of structural-phase transformations in the processing of waste from the production of high-alloy steels

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.238763

Keywords:

oxide anthropogenic waste, alloy steel scale, reduction melting, X-ray phase studies

Abstract

This paper reports a study into the peculiarities of the structural-phase composition of the alloy obtained by using anthropogenic waste from the production of high-alloy steels involving reduction melting. That is necessary for determining the technological parameters that could help decrease the loss of alloying elements in the process of obtaining and using a doped alloy. This study has shown that at an O:C ratio in the charge of 1.84, the alloy consisted mainly of the solid solution of carbon and alloying elements in α-Fe. The manifestation of Fe3C C carbide with alloying elements as substitution atoms was of relatively weak intensity. At the O:C ratios in the charge of 1.42 and 1.17, there was an increase in the intensity of the Fe3C carbide manifestation. At the same time, the emergence of the carbide compounds W2C·Mo2C and WC was identified. Several phases with different content of alloying elements were present in the microstructure images. Cr content in the examined areas changed in the range of 0.64–33.86 % by weight; W content reached 41.58 % by weight; Mo –19.53 % by weight; V – 18.55 % by weight; Co – 3.95 % by weight. The carbon content was in the range of 0.28–2.43 % by weight. Analysis of the study results reveals that the most favorable ratio of O:C in the charge was 1.42. At the same time, the phase composition was dominated by a solid solution of the alloying elements and carbon in α-Fe. The share of the residual carbon concentrated in the carbide component was in the range of 0.52–2.11 % by weight, thereby ensuring the required reduction capability of the alloy when used. The study reported here has made it possible to identify new technological aspects of obtaining an alloy by utilizing anthropogenic waste, and whose indicators provide for the possibility of replacing part of standard ferroalloys when smelting steels without strict restrictions on carbon content.

Author Biographies

Viacheslav Borysov, Donbass Institute of Technique and Management Private Higher Educational Establishment «Academician Yuriy Bugay International Scientific and Technical University»

Head of Laboratory

Research Laboratory of Applied Materials Science

Tetiana Solomko, Donbass Institute of Technique and Management Private Higher Educational Establishment «Academician Yuriy Bugay International Scientific and Technical University»

Senior Researcher

Research Laboratory of Applied Materials Science

Mykhail Yamshinskij, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

Doctor of Technical Science, Associate Professor

Department of Foundry of Ferrous and Nonferrous Metals

Ivan Lukianenko, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"

PhD

Department of Foundry of Ferrous and Nonferrous Metals

Bohdan Tsymbal, National University of Civil Defence of Ukraine

PhD

Department of Occupational, Technogenic and Environmental Safety

Andrey Andreev, Zaporizhzhia National University

Doctor of Pedagogical Sciences, Associate Professor, Head of Department

Department of General and Applied Physics

Viacheslav Bratishko, National University of Life and Environmental Sciences of Ukraine

Doctor of Technical Sciences, Senior Researcher, Dean

Mechanical and Technological Faculty

Tamara Bilko, National University of Life and Environmental Sciences of Ukraine

PhD, Associate Professor

Department of Occupational Safety аnd Environmental Engineering

Victor Rebenko, National University of Life and Environmental Sciences of Ukraine

PhD, Associate Professor

Department of Mechanization of Animal Husbandry

Tetiana Chorna, Dmytro Motornyi Tavria State Agrotechnological University

PhD, Associate Professor

Department of Machine Usage in Agriculture

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Published

2021-08-26

How to Cite

Borysov, V., Solomko, T., Yamshinskij, M., Lukianenko, I., Tsymbal, B., Andreev, A., Bratishko, V., Bilko, T., Rebenko, V., & Chorna, T. (2021). Identification of the features of structural-phase transformations in the processing of waste from the production of high-alloy steels . Eastern-European Journal of Enterprise Technologies, 4(12(112), 33–38. https://doi.org/10.15587/1729-4061.2021.238763

Issue

Section

Materials Science