2_2020_sen_7

Title of the article

METAL SCIENCE ASPECTS OF THE INFLUENCE OF DISPERSION NITRIDE HARDENING ON THE STRUCTURE OF HYPOEUTECTOID AND EUTECTOID CARBON STEELS
Authors

SHIPITSYN Sergey Ya., D. Sc. in Eng., Head of the Laboratory, Physico-Technological Institute of Metals and Alloys of the NAS of Ukraine, Kiev, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ZHORNIK Viktor I., D. Sc. in Eng., Assoc. Prof., Head of the Department of Technologies of Mechanical Engineering and Metallurgy — Head of the Laboratory of Nanostructured and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ISAEVA Lyudmila E., Ph. D. in Chem., Associate Professor of the Department of Theory of Metallurgical Processes and Chemistry, National Metallurgical Academy of Ukraine, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KUCHERENKO Pavel N., Junior Researcher, Physico-Technological Institute of Metals and Alloys of the NAS of Ukraine, Kiev, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

LIHOVEY Dmitry I., Junior Researcher, Physico-Technological Institute of Metals and Alloys of the NAS of Ukraine, Kiev, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MATERIALS SCIENCE IN MECHANICAL ENGINEERING
Year 2020 Issue 2 Pages 63–73
Type of article RAR Index UDK 621.78:669.14 Index BBK  
Abstract The article presents the results of metal science research on the influence of nitrogen and vanadium microalloying of carbon steels with a carbon content of 0.5–0.8 wt.% on the thermodynamic and thermokinetic parameters of the phase redistribution of nitrogen and vanadium, as well as the formation of ferrite-pearlite, bainite and martensite structures and their transformation during high tempering. It was shown that the dispersion of the structure formed during cooling after austenitization, as well as the decrease of the growth rate and coagulation of cementite particles are the result of dispersion of the pearlite, bainite and martensite tempering structures. The positive effect of the dispersion of structures of all levels on the improvement of the mechanical properties (yield point, impact toughness, wear resistance under sliding and rolling friction, etc.) of the steel modified by nitrogen and vanadium microalloying is noted. That provides good prospects for the effective use of steels with dispersion nitride hardening for the production of railway wheels and rails.
Keywords

carbon steels, alloying, dispersion nitride hardening, ferrite-pearlite, bainite and martensite structures, austenitization, tempering, phase transformations, railway wheels and rails
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