UDC 812.35.31.03.15 DOI: 10.34641/SP.2024.1065.2.007 Semenov V. N., Koshlakov V. V., Rizakhanov R. N., Sigalaev S. K., Danilin K. D. — Brazing of liquid rocket engine structures — achievements and discovery
The paper considers the issue of interaction of brazed metals during brazing of liquid rocket engine structures with a simultaneous increase in the reliability of brazed structures. Keywords: brazing, cracks, EP 202 alloy, solder, crystal lattice
SCIENTIFIC AND TECHNICAL SECTION
UDC 812.35.27.15 DOI: 10.34641/SP.2024.1065.2.008 Skoblikov Ya. P., Shamrai F. A., Efimov E. I., Strukov I. G., Kurakin A. I., Murzin V. V. — Investigation of the influence of the surfacing mode on the geometry of the deposited layer in wire arc additive manufacturing using Sv-08G2S wire
This work is devoted to the study of the surfacing mode influence on the geometry of the deposited metal in wire arc additive manufacturing of products using Sv-08G2S wire. The construction of a mathematical model of the dependence of the width and height of the deposited metal on the surfacing mode is carried out. The construction of response surfaces (iso-width and iso-height) depending on the surfacing mode is performed. Keywords: additive manufacturing, surfacing, wire, mathematical model, geometry of deposited metal
UDC 812.35.17 DOI: 10.34641/SP.2024.1065.2.009 Natalenko V. S., Latypov R. A., Latypova G. R., Strizheus V. A. — Properties of the joint obtained by electric resistance welding of PGS-27M metal powder in the cells of a metal woven mesh on steel 45
The results of experimental studies of the macrostructure, microstructure, microhardness of the coating and its joint zone, obtained by electric resistance welding of PGS-27M metal powder in the cells of a metal woven mesh made of low-carbon steel on a steel 45 specimen, are presented. Keywords: electric resistance welding, metal woven mesh, metal powder, coating, microstructure, phase analysis, microhardness, wear resistance
UDC 621.791.927; 621.791.75.042-492 DOI: 10.34641/SP.2024.1065.2.010 Leshchinsky L. K., Ivanov V. P., Matvienko V. N. — Influence of surfacing a layer of variable composition on increasing the cracking resistance of blooming mill rolls
The results of research on technology and surfacing materials aimed at increasing the cracking resistance of deposited grooves of blooming mill rolls are presented. It is shown that one of the ways to solve this problem is the use of technology for surfacing a layer of variable composition and properties by changing the content of alloying elements in the deposited metal in accordance with the unevenness of the load acting on the roll grooves. Keywords: blooming mill, roll, groove, cracking, uneven wear, surfacing, alloying elements, variable composition, properties
UDC 621.791.011 DOI: 10.34641/SP.2024.1065.2.011 Semykin V. N., Protsenko V. N., Besko A. V., Sviridov D. A., Matveeva S. D. — Supplement to the classification in the geometry of residual stresses
The article supplements the classification of fields of trajectories of principal residual stresses (isostats), as well as zones and regions formed in such fields after processing specimens of low-carbon steel for the purpose of stress relief. The work opens up additional possibilities for assessing the stress state of parts and assemblies made of ferromagnetic materials. Keywords: welding, surfacing, magnetoelastic method, elastic and tortuous trajectories of principal stresses
UDC 812.35.01.81 DOI: 10.34641/SP.2024.1065.2.012 Trefilov V. F., Serov A. V. — The arc as a source of information
The use of a magnetic field and high-voltage probes makes it possible to create simple and cheap sensors capable of operating in conditions of interference created by the arc, as well as close to the infrared range. Keywords: arc, joint sensor, magnetic field, voltage
PRODUCTION SECTION
UDC 621.791.037 DOI: 10.34641/SP.2024.1065.2.013 Gulakov S. V., Burlaka V. V., Golovin A. Yu., Fedosov A. V., Zarechensky D. A., Psareva I. S. — Universal apparatus for field welding
The paper presents the results of the development of universal equipment for performing mechanized welding operations and electrical supply to consumers in non-standard conditions. Schematic and design solutions of the main units are shown. Keywords: welding current source, charger, electrical circuit, welding gun-torch, wire feed mechanism, self-shielded flux-cored wire
UDC 621.791:621.643.1/2 DOI: 10.34641/SP.2024.1065.2.014 Zorin E. E., Neganov D. A., Kasyanov A. N. — Assessment of the influence of technological and operational stress concentrators in the zone of welded joints on the long-term serviceability of oil pipelines
The influence of structural-phase transformations in pipe steels of the ferrite-pearlite class (17G1S and X70) in the heat-affected zone of field welds on the cyclic crack resistance of the metal of this zone in air and in a corrosive-active environment is investigated. The results of the studies can be used to adjust the hazard degree indicators of surface stress concentrators located in the zone of welded joints of the pipeline. Keywords: pipeline, welded joint, structural transformations during welding, cyclic crack resistance
UDC 812.35.31.13.15 DOI: 10.34641/SP.2024.1065.2.015 Pashkov I. N., Gadzhiev M. R., Morozov V. A., Bazlova T. A. — Selection of solder in the production of road machine cutters and investigation of the microstructure of brazed joints
This paper considers the process of induction brazing of road machine cutters with various solders having different forms of application. The microstructure of brazed joints for two classes of solders — copper-manganese and copper-zinc — is investigated; differences in the formation of a diffusion zone in the hard alloy, accompanied by a decrease in cobalt content, are found. The influence of solder forms on the quality of brazed seams is studied. Keywords: induction brazing, brazing of road cutters, import substitution, diffusion zone, solder form
INFORMATION
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