STUDY OF THE INFLUENCE OF THE Si/Mn CONTENT RATIO ON THE DENDRITIC STRUCTURE OF STEELS FOR RAILWAY AXLES

Babachenko, О.; Balakhanova, T. V.; Safronova, O.; Kononenko, G.

doi:10.15588/1607-6885-2022-1-1

НМТ

2022

DOI: 10.15588/1607-6885-2022-1-1

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STUDY OF THE INFLUENCE OF THE Si/Mn CONTENT RATIO ON THE DENDRITIC STRUCTURE OF STEELS FOR RAILWAY AXLES

О. Babachenko¹,

T. V. Balakhanova²,

O. Safronova³

et al.

Abstract: Purpose. Investigation of the effect of different total concentration and ratio of Si and Mn content on the dendritic structure and segregation inhomogeneity of cast carbon steel and its transformation after hot plastic deformation. Methods of research. To determine the effect of the content of Si and Mn, experimental ingots with a variable chemical composition within the grade were made for three steel grades used for the manufacture of railway axles – grade OS according to DSTU 31334, F according to AA… Show more

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Cited by 2 publications

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Modern perspective metal materials for armored obstacle (overview)

Kononenko¹,

Kimstach²,

Safronova³

et al. 2022

Fund.Appl.Probl.F.Met

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To date, means of protection of all types of armored vehicles against damage by small arms are actively being developed, new grades of steel with increased anti-projectile resistance indicators are being developed, which ensure a reduction in the metal content of structures while simultaneously increasing the tactical and technical characteristics of the product. The constant increase in requirements for the protection of armored vehicles, caused by the improvement of highly effective means of attack, dictates the need to find new approaches to increase the dynamic stability of armored steels using modern metallurgical, material science and construction achievements. The development and design of workable materials and structures of armor protection is a complex scientific and technical problem. The purpose of the work is to determine, based on the analysis of literary sources, the main trends in the development and improvement of modern metal materials for the manufacture of armored obstacles, which have high dynamic resistance against modern highly effective small arms weapons. The paper analyzes the most widely used metal materials for the manufacture of armored barriers, presents information about their advantages and disadvantages, and provides an assessment of the prospects for further development of this industry. It is noted that the current concept of weapons development is aimed at the use of high-tech materials and innovative methods that allow improving protective functions without increasing the mass and dimensions of armor protection. Currently, many different materials are used to create armor protection: metal plates based on steel, titanium, aluminum and their alloys, aramid or polyethylene fibers, as well as ceramics based on boron carbides, silicon, and others. In accordance with the existing concept of increasing the effectiveness of armor protection and ensuring a combination of firepower, security and mobility, the use of promising materials for the creation of armor protection provides an additional reserve for increasing the combat and military-economic efficiency of military equipment.

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Modern perspective metal materials for armored obstacle (overview)

Kononenko¹,

Kimstach²,

Safronova³

et al. 2022

Fund.Appl.Probl.F.Met

View full text Add to dashboard Cite

show abstract

Formation of the macrostructure depending on the city and the ratio of the main components in railway steel ingots

Babachenko¹,

Balakhanova²,

Kononenko³

et al. 2022

Fund.Appl.Probl.F.Met

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The purpose of the work is to establish the influence of the basic elements of the chemical composition of steel for railway axles on the features of the formation of the primary structure. The problem of macrosegregation of alloying elements, which occurs during the solidification of a cast billet during continuous casting, remains relevant; it is the subject of countless experiments and theoretical judgments. A large percentage of these studies are devoted to carbon segregation, which is understandably highly relevant for the production of carbon steels. The relationship of processing, microstructure and properties indicates that the morphology and properties of the various phases at the microscopic level are largely closely related to the macroscopic behavior of materials. Basic knowledge about the mechanism of segregation shows that this is a very complex effect and it is necessary to take into account a wide range of factors that affect the continuous casting process. Due to the limited solubility of individual elements in the crystal lattice of steel, during the solidification of the melt, the residual liquid is enriched, resulting in the formation of micro- and macrosegregations (segregations, heterogeneities). The aim of the work is to reveal the influence of chemical elements on the formation of reverse segregation. As part of this work, pilot batches of steel samples were made and analyzed, which are used for the manufacture of railway axles - steel grades OS according to DSTU 31334, F according to AAR M 101 and EA1N according to EN 13261. Separate emphasis was placed on the ratio of content in steel Si and Mn. The formation of the so-called "reverse segregation" zone, observed in the studied ingots, is most likely due to the contamination and gas contamination of steel. The nature of the formation of this zone coincides with the features of the formation of places of contact between the branches of higher-order dendrites. It is established that the presence of structural heterogeneity reduces the mechanical properties. It has been shown for the first time that an increase in the ratio of Mn to Si content in axial steels of the EA1N, OC, and F grades contributes to an increase in the gas saturation of the steel and the appearance of anomalous structures.

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STUDY OF THE INFLUENCE OF THE Si/Mn CONTENT RATIO ON THE DENDRITIC STRUCTURE OF STEELS FOR RAILWAY AXLES

Cited by 2 publications

References 4 publications

Modern perspective metal materials for armored obstacle (overview)

Modern perspective metal materials for armored obstacle (overview)

Formation of the macrostructure depending on the city and the ratio of the main components in railway steel ingots

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