Leushin I.O., Vakhidov U.Sh., Ryabova L.I., Shilyaev А.А. Production of synthetic cast iron using material from worn-out automobile tires
The article discusses the use of worn-out car tires as a carbonizer in the production of synthetic cast iron. A technical solution has been found that is suitable for existing production facilities. The article proposes the use of a carbonizer for carbonizing synthetic cast iron, which contains coarse rubber crumbs of a specific fraction obtained from worn-out car tires, as part of a briquette produced using a "warm" pressing method. This carbonizer is characterized by its availability, high degree of carbon absorption by the melt, and low consumption, which ensures the production of high-quality cast iron without compromising the working conditions of the production staff.
Keywords:Steel scrap, synthetic cast iron, worn-out car tires, carburizer, briquettes.

Marukovich E.I., Stetsenko V.Yu., Stetsenko A.V. Nanostructuring during crystallization of carbon cast steels
The crystallization of carbon cast steels is a nanostructural process in which elementary iron and graphite nanocrystals play a major role. Molecular and atomic hydrogen, atomic oxygen are the demodifying elements of the crystallizing phases. To modify carbon cast steels, it is necessary to reduce the concentrations of oxygen and hydrogen atoms in the melts and (or) increase the rate of solidification of the melts.
Keywords:Carbon casting steels, crystallization, nanocrystals, melt, oxygen, hydrogen, adsorption.

Malinov L.S., Malinov V.L., Lavrova E.L., Tsys E.A. Economically alloyed manganese steel with metastable austenite-alternative to steel 110G13L
Data on the influence of chemical composition, heat treatment modes, and abrasive conditions characterized by the coefficient of dynamicity (Сd) on the wear resistance of economically alloyed manganese steels with metastable austenite are presented. During the wear process, it undergoes a dynamic deformation martensitic transformation -DDMT (the effect of self-hardening under loading-SHL). A differentiated approach to the choice of chemical composition and heat treatment modes of the steels under consideration in relation to the conditions of abrasive action provides them with higher wear resistance than steel 110G13L and in many cases lower cost and environmental pollution during smelting. They are an alternative to steel 110G13L.
Keywords:Steel, metastable austenite, wear resistance, self-hardening effect under loading, heat treatment modes.

Baranov D.A., Isaev S.L., Zhatkin S.S., Nikitin К.V. Structure formation of Inconel 718 alloy obtained by direct laser growth, depending on the cooling rate during quenching
The paper presents the results of studies on the effect of cooling rate after quenching on the structure and properties of the heat-resistant alloy Inconel 718 obtained by the direct laser growth method. The paper presents data on metallographic studies, physical and mechanical properties, and long-term strength. It is shown that the primary structure of the grown samples forms a fine-celled dendritic multidirectional structure of austenitic composition. In the cross-section, the formation of a needle-like structure with a chaotic direction of crystal growth is observed, and in the longitudinal section, the formation of columnar dendrites is observed. It has been established that the cooling rate after quenching has a significant effect on the amount and distribution of the ?’ phase in the alloy, as well as on the long-term strength at elevated temperatures.
Keywords:Additive technologies, structure, homogenizing annealing, metal power composition, phase.

Gruzdeva I.A. Lost-wax casting or selective laser smelting: prospects for technologies in jewelry manufacturing
The study is devoted to comparative analysis of two technologies for manufacturing metal jewelry blanks: lost-wax casting and selective laser melting. The macrostructure of samples obtained by selective laser melting is studied, and distinctive features are highlighted. The approach to selecting a jewelry alloy composition should be modified to ensure its suitability for selective laser melting. The reflectivity, thermal conductivity, and liquidus temperature are key alloy characteristics that should be considered when selecting and setting the process parameters for selective laser melting. Potential alloying additives for gold jewelry alloys for the purpose of producing high-quality blanks manufactured using selective laser melting are presented.
Keywords:Lost-wax casting, selective laser melting, jewelry manufacturing.

Nikitin K.V., Glushenkov V.A., Timoshkin I.Yu., Solomatin D.A., Toropishcheva O.N. Modeling of metal flows in a melt under the influence of pulsed magnetic fields
Using computer modeling and a search experiment, the possibility of forming metal flows in a melt under the influence of a dynamic microsecond pulse generated by a magnetic field is shown. The process was modeled using the immersed body method in the Ansys CFX software package. Visualization patterns of the flow of a viscous medium (melt) under the influence of a pulsed magnetic field have been obtained, showing the possibility of the formation of local turbulent zones around a submerged body, the interaction of direct and reflected metal flows. A field experiment performed using the "thin threads" method, which was placed inside a viscous medium, confirmed the main findings of the computer simulation.
Keywords:Pulsed magnetic fields, melt, computer modeling, metal flows.

Leushin I.O., Vakhidov U.Sh., Ryabova L.I., Shilyaev А.А. Production of synthetic cast iron using material from worn-out automobile tires

Marukovich E.I., Stetsenko V.Yu., Stetsenko A.V. Nanostructuring during crystallization of carbon cast steels

Malinov L.S., Malinov V.L., Lavrova E.L., Tsys E.A. Economically alloyed manganese steel with metastable austenite-alternative to steel 110G13L

Baranov D.A., Isaev S.L., Zhatkin S.S., Nikitin К.V. Structure formation of Inconel 718 alloy obtained by direct laser growth, depending on the cooling rate during quenching

Gruzdeva I.A. Lost-wax casting or selective laser smelting: prospects for technologies in jewelry manufacturing

Nikitin K.V., Glushenkov V.A., Timoshkin I.Yu., Solomatin D.A., Toropishcheva O.N. Modeling of metal flows in a melt under the influence of pulsed magnetic fields