ISSN 0491-6441

Journal "Svarochnoe Proizvodstvo"

WELDING, RELATED PROCESSES AND TECHNOLOGIES

UDC 681.5.015
DOI: 10.34641/SP.2024.1064.1.001
Petrov S. Yu., Orlov S. E. — Determination of the amount of energy released at the rail ends during flash-butt welding based on solving the inverse heat conduction problem

As a result of the conducted numerical studies of the kinematics of temperature fields during rail welding, two finite element problems were solved to determine the energy used for the formation of a welded joint at the initial stage of end flashing: 1) the direct heat conduction problem for uniform heating of the rail end; 2) the inverse heat conduction problem with a bevel at the rail end. The regularities of energy release during uniform and non-uniform (presence of a bevel) heating of the rail end are established.
Keywords: identification, current lines, bevel, finite element method, flash-butt welding, direct and inverse heat conduction problems, rail, thermal imager, thermal cycle, end, energy

SCIENTIFIC AND TECHNICAL SECTION

UDC 621.791
DOI: 10.34641/SP.2024.1064.1.002
Semenov V. N., Rizakhanov R. N., Koshlakov V. V. — High-temperature brazing of multiphase structures

The physical and chemical processes accompanying the formation of a high-temperature brazed joint based on copper-silver solder, when the surfaces to be brazed are multiphase structures (heat-resistant steel, precipitation-hardening alloy, etc.), are investigated. The analysis of the processes occurring during the interaction of the copper-silver melt and the brazed surface and leading to joint failure is carried out.
Keywords: high-temperature brazing, copper-silver solder, barrier coating, multiphase structure, precipitation-hardening alloy, heat-resistant steel, crack, failure, strength

UDC 621.791.923
DOI: 10.34641/SP.2024.1064.1.003
Kovtunov A. I., Isakov Yu. A., Vershinin L. V. — Structure and properties of deposited titanium cuprides

The technology of argon arc surfacing of alloys based on titanium cuprides using an electrode wire based on aluminum bronze is proposed.
Keywords: intermetallic alloys, titanium cuprides, arc surfacing, chemical composition, phase composition, electrode wire, hardness, wear resistance, deposited bead

UDC 812.35.03.13
DOI: 10.34641/SP.2024.1064.1.004
Matyunin V. M., Marchenkov A. Yu., Tsvetkova N. O., Sviridov G. B., Pankina A. A., Zhgut D. A. — Operational control of residual stresses in welded joints

On a welded joint obtained by electron beam welding, the method for determining residual stresses by instrumental indentation, regulated by GOST R 57172-2016, is tested. Practical recommendations are given for the application of the considered method for welded joints with control of residual stresses at various points of the weld cross-section at different distances from the surface.
Keywords: residual stresses, welded joints, instrumental indentation, electron beam welding, indentation diagram, hardness, low-alloy steel

UDC 812.35.19.17
DOI: 10.34641/TM.2023.247.1.003
Kryuchina O. A., Shiganov I. N., Sadovnikov I. E. — Features of the energy characteristics of the light technological medium during laser and laser-arc processing of metals with fiber lasers

The article presents the features of the energy characteristics of the light medium of laser and hybrid laser-arc technological welding. It is shown that during laser processing of various metallic materials, different spectra of the light medium arise — ultraviolet, infrared, and visible radiation. The measurement results showed that the parameters of ultraviolet and infrared radiation during laser welding of aluminum alloys are higher than during welding of steel specimens. In hybrid laser-arc welding, high values of ultraviolet and infrared radiation prevail, while laser irradiance is practically absent. The means of protection against laser and accompanying radiation that must be provided for in the processes under consideration are determined.
Keywords: laser welding, hybrid laser-arc welding, energy characteristics, laser radiation, protective equipment

PRODUCTION SECTION

UDC 691:721.75
DOI: 10.34641/SP.2024.1064.1.005
Feofanov A. N., Ovchinnikov V. V., Smirnov S. V. — Automation of quality control of joints in resistance spot welding of needle fasteners made of titanium alloys

The features of joint formation between the needle and the plate of a needle bushing during resistance spot welding are investigated. A technological scheme for making the joint of the needle with the needle bushing plate is proposed, which ensures the formation of a cast zone between the needle and the plate metal.
Keywords: needle bushing, resistance welding, needle, plate, titanium alloys, automation of joint quality control, welding current, pulse duration, pressing-out force

UDC 621.791.75; 621.314
DOI: 10.34641/SP.2024.1064.1.006
Zarechensky D. A., Gulakov S. V., Burlaka V. V., Fedosov A. V., Golovin A. Yu. — Analysis of welding properties and energy consumption of single-phase arc welding power sources

The results of comparative tests of single-phase welding current power sources — inverters and a transformer from different manufacturers — are presented, as a result of which differences in welding properties and energy consumption characteristics are established. The possibility and feasibility of increasing the power factor of inverter power sources are shown.
Keywords: power source, inverter, transformer, welding properties, power factor

PRODUCT QUALITY MANAGEMENT, STANDARDIZATION. ORGANIZATION OF PRODUCTION

UDC 339.133.017, 339.133.2, 339.138, 621.791
Belov E. I. — Current state and problems of prospective development of the Russian welding industry

The article considers the current state of the Russian welding industry. The volumes of welding equipment production in Russia and the level of import dependence for various welding technologies are determined. A list of priority directions for the development and support of the welding industry is formed.
Keywords: welding industry, state of welding equipment, development, prospects

INFORMATION

Invitation to the International Conference "Welding and Related Technologies for the Manufacture of Special and Critical Equipment"

Results of the X Anniversary International Industrial Forum "Territory NDT-2023. Non-Destructive Testing. Testing. Diagnostics"

ISSN 0491-6441

Journal "Svarochnoe Proizvodstvo"

WELDING, RELATED PROCESSES AND TECHNOLOGIES

UDC 621.791.16
DOI: 10.34641/SP.2024.1069.6.038
Volkov S. S., Rozanov D. S., Sudarev A. V., Remizov A. L. — Energy performance indicators of the acoustic assembly in ultrasonic welding of synthetic fabrics

Magnetostrictive acoustic systems are considered, and the materials from which they are manufactured are given. Work aimed at reducing the acoustic power introduced into the welded products during ultrasonic welding of synthetic fabrics is carried out. Dependences of the electroacoustic efficiency of the acoustic system are plotted.
Keywords: ultrasonic welding, waveguide oscillation amplitude, oscillation frequency, welding pressure, acoustic assembly, gain factor

SCIENTIFIC AND TECHNICAL SECTION

UDC 621.791.75
DOI: 10.34641/SP.2024.1069.6.039
Korotkova G. M., Rychin A. I. — Technological properties of a rectangular AC arc in welding of aluminum alloys

The paper presents the results of studies of the indicators of the technological properties of a rectangular AC arc during non-consumable electrode welding of AMg6 alloy.
Keywords: TIG welding, Al alloys, technological properties of a free rectangular AC arc, penetrating ability, arc burning stability, structure of the fusion zone and weld, oxide film cleaning, variety of adjustable parameters with their separate regulation

UDC 621.79
DOI: 10.34641/SP.2024.1069.6.040
Melyukov V. V., Zhilin P. L., Melnichenko O. P. — Modeling of the thermal process of material processing by combined sources

Cases of combined action of two or more energy sources in welding and material processing are considered. A mathematical model of the thermal process under the action of two or more sources is developed, and the results of a numerical solution are presented.
Keywords: concentrated source, combined sources, isotherm, thermal cycle

UDC 621.791
DOI: 10.34641/SP.2024.1069.6.041
Latypov R. A., Lyushinsky A. V., Sotskov A. A., Latypova G. R. — Features of the formation of an aluminum-to-glass-ceramic joint through an intermediate indium layer

The possibility of diffusion welding of aluminum to glass-ceramic through an intermediate indium layer at room temperature is shown.
Keywords: diffusion welding, aluminum, deformation, glass-ceramic, indium, joint zone, X-ray spectral analysis, microhardness

UDC 621.791.927
DOI: 10.34641/SP.2024.1069.6.042
Kozhechenko A. S., Shcherbakov A. V., Rodyakina R. V., Lunin V. P. — Determination of distortions of the current density distribution due to electron re-reflection when measuring powerful technological electron beams

A geometric model and detector materials for measuring technological electron beams are presented. The influence of reflected and re-reflected electrons during interaction with the sensor diaphragms on the recorded signals is shown.
Keywords: electron beam, technological electron beam, welding electron beam, electron re-reflection, electron beam diagnostics, electron beam measurement

PRODUCTION SECTION

UDC 621.791.042.4
DOI: 10.34641/SP.2024.1069.6.043
Sheksheev M. A. — Investigation of the influence of arc welding modes on the structure and microhardness of the deposited metal in the presence of powder modifiers

This work is devoted to studies of the influence of the WC modifying additive in the coating of stick electrodes on the structural parameters of the deposited metal and its microhardness level.
Keywords: welding, surfacing, coated electrode, modification, inoculation, metal structure, microhardness

UDC 621.791/.792
DOI: 10.34641/SP.2024.1069.6.044
Korshunov V. Ya., Kupreenko A. I., Isaev Kh. M., Isaev S. Kh., Mikhailichenko S. M. — Determination of the energy efficiency of methods for surfacing worn surfaces of tillage tools and machine parts

The paper presents an assessment of the energy efficiency of methods for surfacing worn surfaces of tillage tools and machine parts. The analysis of the data obtained in the work showed that mechanized methods of restoring worn surfaces of tillage tools and machine parts have greater energy efficiency in terms of efficiency factor than the manual surfacing method.
Keywords: energy, enthalpy, surfacing methods, productivity, efficiency factor

UDC 621.791.927.5
DOI: 10.34641/SP.2024.1069.6.045
Chigarev V. V., Zarechensky D. A., Vorobiev V. V. — Formation of the structure and properties of deposited metal by flux-cored strips

The main types of alloys deposited on parts of blast furnace equipment by flux-cored strip electrodes are considered. The results of studies of the chemical composition, microstructure, and hardness of the phase constituents of alloys resistant under gas-abrasive wear conditions are presented.
Keywords: flux-cored strip, deposited metal, gas-abrasive wear, hardness, wear resistance, crack formation, carbide phase

UDC 621.791.927.048
DOI: 10.34641/SP.2024.1069.6.046
Ershov A. V., Ershov A. A. — Increasing the productivity and quality of anti-corrosion surfacing of NPP power equipment

A review of domestic and foreign welding fused fluxes currently used for anti-corrosion surfacing of NPP power equipment is carried out. The fluxes are divided into 3 groups according to their chemical activity. Their positive and negative aspects depending on their chemical activity and base are shown.
Keywords: anti-corrosion surfacing, welding flux, fused flux, ceramic flux, welding-technical properties, strength characteristics

INFORMATION

Alphabetical index of articles for 2024

ISSN 0491-6441

Journal "Svarochnoe Proizvodstvo"

WELDING, RELATED PROCESSES AND TECHNOLOGIES

UDC 546
DOI: 10.34641/SP.2024.1068.5.030
Silyakov S. L., Boyarchenko O. D., Sychev A. E. — Synthesis of cast rod products in the SHS mode for pulsed electric spark surfacing

This work is devoted to the creation of long-length products by the method of self-propagating high-temperature synthesis. The paper determines the main parameters that ensure the possibility of obtaining long-length products based on a cast alloy. A comprehensive study of the structure and phase composition of the synthesized alloy is carried out.
Keywords: long-length products, cast alloys, exothermic mixtures, method of self-propagating high-temperature synthesis

SCIENTIFIC AND TECHNICAL SECTION

UDC 621.791.053-83
DOI: 10.34641/SP.2024.1068.5.031
Gulakov S. V., Burlaka V. V., Golovin A. Yu., Psareva I. S. — The issue of the mechanism of undercut formation in arc welding

The paper presents the results of a study of the causes of the formation of welding defects — undercuts. A new model of the undercut formation process based on the hydrodynamic situation in the weld pool is proposed.
Keywords: arc welding, undercuts, weld pool, weld, flows in the weld pool

UDC 621.791+621.9.048.6
DOI: 10.34641/SP.2024.1068.5.032
Ponomarev K. E., Strelnikov I. V., Antonov A. A. — Results of the application of vibration treatment of AMg6 alloy joints in consumable and non-consumable electrode welding

The article considers examples of the practical implementation of vibration treatment carried out together with different methods of arc welding of AMg6 aluminum alloy: gas tungsten arc welding and semi-automatic welding. Based on the criteria of residual stresses and residual deformations, a comparative analysis of specimens obtained by these welding methods with and without the use of accompanying vibration treatment is carried out.
Keywords: gas tungsten arc welding, semi-automatic consumable electrode welding, welding process with vibration, arc welding, residual stresses, residual displacements, laser speckle interferometry, laser 3D scanning

UDC 621.791.18 (075.8)
DOI: 10.34641/SP.2024.1068.5.033
Barabanova O. A., Aleksandrova S. S. — Influence of the manufacturing technology of silicon single crystal wafers on the distribution of residual stresses and the state of the surface layer

The article is devoted to the assessment of the quality of single-crystal silicon wafers after performing the technologies of growing a single-crystal seed and subsequent mechanical treatments before diffusion welding with a metal part.
Keywords: silicon single crystal, wafers, manufacturing, surface layer, defects

UDC 621.791.72
DOI: 10.34641/SP.2024.1068.5.034
Goncharov A. L., Rodyakina R. V., Lunin V. P., Chulkov I. S., Nekhoroshev A. V., Glinsky A. V. — Assessment of the influence of beam deflection in electron beam welding on the degree of weld metal penetration and the properties of welded dissimilar materials

The presented work is devoted to the assessment of the influence of beam deflection in electron beam welding on the degree of weld metal penetration and, as a consequence, on the properties of welded dissimilar materials, which opens up wider opportunities for controlling the composition of the weld metal during welding. The paper presents the relationship between beam deflection and the properties of the resulting welded joints. It is shown that the use of numerical models makes it possible to quantitatively predict the parameters of beam deflection in electron beam welding of dissimilar steels.
Keywords: electron beam welding, dissimilar steels, influence of beam deflection on the degree of weld metal penetration, numerical modeling, control of the chemical composition of the weld metal, spectral analysis of the weld metal, heat treatment of welded joints

PRODUCTION SECTION

UDC 621.9.048
DOI: 10.34641/SP.2024.1068.5.035
Kostyukov A. Yu. — Restoration of machine parts by electric spark treatment

The work is devoted to familiarization with the proven capabilities for hardening and restoring engine parts of machines by electric spark treatment. Practical recommendations for the restoration of parts are given, based on the results of theoretical and experimental studies, the effectiveness is confirmed by successful implementation in production practice.
Keywords: electric spark treatment, technology, electrode, part, restoration, coating

UDC 621.791.927.93
DOI: 10.34641/SP.2024.1068.5.036
Ershov A. V., Ershov A. A. — New ceramic flux for welding austenitic-ferritic steels

The article presents materials on the study of the welding and technological properties of passive fused flux 48-OF-6 and two ceramic fluxes FTsK-27 and FVK-1.
Keywords: flux, submerged arc welding, ceramic flux, metallurgical and welding-technological properties

UDC 621.791.36
DOI: 10.34641/SP.2024.1068.5.037
Fedotov I. V., Ivannikov A. A., Terekhova S. M., Dzhumaev P. S., Klyushin I. I., Sevryukov O. N. — Application of a rapidly quenched solder for obtaining a biocompatible brazed joint

In this work, the wetting angle of the STEMET 1201 solder on ZTA ceramics and VT1-0 alloy was measured, microstructural studies of brazed ZTA ceramic-Ti joints with various configurations, as well as corrosion studies in accordance with the ASTM F2129 standard were carried out. The structure of brazed joints before and after corrosion tests is shown, areas of corrosion damage are established, and recommendations for modifying the brazing mode to improve the corrosion properties of the joint are formulated.
Keywords: brazing, ceramic-to-titanium joint, microstructure formation

METHODS AND INSTRUMENTS FOR CONTROL AND DIAGNOSTICS OF MATERIALS AND PRODUCTS

UDC 812.35.01.81.31.25
DOI: 10.34641/TM.2024.267.9.061
Razygraev A. N., Mazilkin I. S., Mikhailov I. V., Razygraev N. P. — Ultrasonic testing of anti-corrosion claddings of NPP equipment and pipelines

The issues of manufacturing and ultrasonic testing of anti-corrosion claddings of NPP equipment and pipelines are considered. The results of research and development, approbation, testing, and implementation of standard and new methods and technologies of ultrasonic testing are presented.
Keywords: ultrasonic testing, longitudinal wave, transverse wave, head wave, anti-corrosion cladding, transducer, root tandem

PERSONNEL TRAINING

UDC 621.791:378.4
Chigarev V. V., Zarechensky D. A. — 80 years of training welding engineers at the Priazovsky State Technical University

The article presents the historical stages of organizing the training of welding engineers in the city of Mariupol. The features of practical training of students and research activities at the welding departments of the Priazovsky State Technical University are revealed, which ensured the solution of scientific and practical tasks in fruitful cooperation with industrial enterprises, the graduation of qualified engineering personnel and highly qualified personnel.
Keywords: welding engineer, university, department, research work

INFORMATION

Saraev Yu. N. — 75 years

ISSN 0491-6441

Journal "Svarochnoe Proizvodstvo"

SCIENTIFIC AND TECHNICAL SECTION

UDC 812.35.15; 812.35.03.11
DOI: 10.34641/SP.2024.1067.4.023
Orlov V. V., Nosov S. I., Volobuev Yu. S., Kazantsev A. G., Silaev A. A., Darakhvelidze Yu. D., Denisov K. A. — The issue of selecting criteria for substantiating the resistance of the metal of low-alloy Ni-Mn-Mo welds to brittle fracture

The documentation of technical designs for export units of NPPs with VVER provides for increased requirements for the level of properties of the base metal and welds of the main circulation pipelines.
Keywords: welded joints, manual arc welding, weld, Ni-Mn-Mo steels, parameters, fracture

UDC 812.35.27.13.19
DOI: 10.34641/SP.2024.1067.4.024
Volobuev Yu. S., Denisov K. A., Volobuev S. Yu., Karakin I. A., Bobrikov Yu. V. — Methodology for the comparative assessment of the surface characteristics of fluxes for welding and surfacing when conducting research on the welding and technological properties of new materials

The paper considers a methodology for the comparative assessment of the surface characteristics of fluxes for welding and surfacing when conducting research on the welding and technological properties of new materials. Comparative studies of the slag systems of experimental fluxes for welding chromium steels are carried out.
Keywords: flux, welding and surfacing, welding consumables, slag, spreadability

UDC 812.35.15.13
DOI: 10.34641/SP.2024.1067.4.025
Bastakov L. A., Geller A. B., Kovalevich E. V., Kurnosenko M. L. — Selection of materials and investigation of the weldability of high-strength gray cast iron with nodular graphite

Some aspects of the welding processes of gray high-strength cast iron with nodular graphite arising during manual arc welding with coated electrodes with different levels of alloying are considered. Changes in the structures of transition layers along the fusion line of various welding consumables with the base metal, as well as the welding conditions, are shown.
Keywords: welding, cast iron, nodular graphite, electrode

PRODUCTION SECTION

UDC 812.35.27.11
DOI: 10.34641/SP.2024.1067.4.026
Volobuev Yu. S., Volosov N. A., Mitrofanov V. M. — Evolution of technologies and materials for anti-corrosion surfacing of critical equipment at JSC NPO TsNIITMASH

The evolution of the technology of anti-corrosion protection of nuclear power equipment and critical equipment is described. The methods of applying anti-corrosion coating developed at JSC NPO TsNIITMASH are considered. The current directions of development of corrosion protection of nuclear power equipment are given.
Keywords: anti-corrosion coating, history of development, automatic surfacing, implementation, relevance

UDC 812.35.01.81
DOI: 10.34641/SP.2024.1067.4.027
Razygraev A. N., Razygraev N. P., Orlov V. V., Efimov S. V., Evtushenko S. G., Skorobogatykh V. N., Bastakov L. A., Davydov D. M., Samedov Ya. Yu. — Manufacturing of test and calibration specimens, certification of systems and methods for non-destructive testing of NPP equipment and pipelines

The article presents the results of work on providing ROSATOM with technologies for manufacturing specialized test and calibration specimens that are necessary for conducting certification tests of systems, methods, and personnel of non-destructive testing by ultrasonic, visual, television, and eddy current methods, as well as for setting up and checking system equipment before testing the base metal, welded joints, and cladded surfaces of equipment and pipelines. The performance of this work demonstrated and ensured the technological sovereignty of ROSATOM in global production.
Keywords: nuclear power plant, non-destructive testing, ultrasonic testing, eddy current testing, television inspection, defect, discontinuity, test specimen, calibration specimen, base metal, welded joint, anti-corrosion cladding

UDC 812.35.03.07
DOI: 10.34641/SP.2024.1067.4.028
Khodakov D. V., Orlov V. V., Khodakov V. D., Potapov N. N., Volobuev Yu. S. — Metallographic studies of dissimilar welded joints depending on the features of the formation of fusion zones of welded joints of austenitic and pearlitic steels

The article systematizes and summarizes the main regularity determining the structure and properties of welded joints of dissimilar steels used in the manufacture of nuclear power equipment.
Keywords: welded joint, dissimilar steels, welding consumables, fusion zone

UDC 621.78
DOI: 10.34641/SP.2024.1067.4.029
Abrosin A. A., Ershov A. A., Feklistov S. I., Alekseenok P. A. — Computer modeling of the heat treatment technology of a welded rotor of a steam turbine for NPPs

The article considers a method of computer modeling for analyzing the temperature distribution over the cross-section of a welded rotor using heat treatment technology.
Keywords: welded rotor, heat treatment, temperature distribution, modeling, heating

PRODUCT QUALITY MANAGEMENT, STANDARDIZATION. ORGANIZATION OF PRODUCTION

UDC 006.01
Budkin Yu. V. — The contribution of scientist V. A. Kazakov to the technical standardization of mechanical engineering

The contribution of scientist Valentin Alekseevich Kazakov to the development of methods of technical standardization in mechanical engineering is investigated, which resulted in the formation of the section "Product Quality Management. Standardization. Organization of Production" in the journals of the publishing house "Tekhnologiya Mashinostroeniya."

The organizational ability to unite scientists, engineers, and technologists for the development of technical standardization in mechanical engineering is revealed. It is shown that the results of publications became the basis for the development of modern enterprise standards (technical specifications) of the machine-building complex for the implementation of scientific and technical solutions, as well as for inclusion in the Federal Information Fund of Standards.

INFORMATION

Invitation to the Weldex-2024 exhibition

ISSN 0491-6441

Journal "Svarochnoe Proizvodstvo"

WELDING, RELATED PROCESSES AND TECHNOLOGIES

UDC 621.791.14
DOI: 10.34641/SP.2024.1066.3.016
Vasiliev P. A., Shvedov M. A., Kalinin A. G., Grigoriev V. S. — Technology of friction stir welding of copper

The results of research on the technology of friction stir welding of copper and copper-aluminum products are presented.
Keywords: copper, friction stir welding, welded joint, underwater welding, temperature jump, mechanical properties, bimetal, thermoelectricity

SCIENTIFIC AND TECHNICAL SECTION

UDC 621.791.011
DOI: 10.34641/SP.2024.1066.3.017
Semykin V. N., Protsenko V. N., Besko A. V., Sviridov D. A., Kosarev G. G. — Determination of the field of principal stress trajectories in a large-sized welded structure

The article shows the sequence of identifying the trajectories of principal stresses (isostats) in a large-sized welded structure, briefly characterizes the types of principal stress trajectories and the possibilities of controlling their fields. A methodology for identifying trajectories based on the physical non-destructive magnetoelastic method is presented.
Keywords: welded structure, magnetoelastic method, principal stress trajectories

UDC 812.35.19.17.15
DOI: 10.34641/TM.2023.249.3.018
Ishkinyaev E. D., Petrovsky V. N., Grezev N. V., Khriptovich E. V., Shiganov I. N. — Improving the operational properties of metal surfaces using high-power fiber lasers

The paper shows the possibilities of surface hardening of metal products by laser quenching using high-power fiber lasers and various optical systems. The results of quenching an area up to 200 mm wide to a depth of up to 2 mm in a single-pass mode due to controlled heating and cooling of a broadband thermal front formed by a static rectangular radiation spot and an oscillating laser beam with a source power of up to 10 kW are presented. Examples of the practical use of laser broadband heat treatment on real industrial products are given.
Keywords: fiber lasers, laser quenching, beam intensity distribution transformation, scanning optics, temperature field modeling

UDC 621.791.16
DOI: 10.34641/SP.2024.1066.3.018
Volkov S. S., Konovalov A. V., Korolev S. A., Sudarev A. V. — Solving the problem of heating of polymer materials during ultrasonic welding

A hypothesis of the mechanism of heat generation during ultrasonic welding of plastics is proposed. The analysis of the thermal regime of ultrasonic welding of plastics and the kinetics of welded joint formation is carried out.
Keywords: ultrasonic welding, hysteresis losses, modulus of elasticity, cyclic deformation, static welding pressure, critical temperature

PRODUCTION SECTION

UDC 812.35.15.14.23
DOI: 10.34641/SP.2024.1066.3.019
Kalugin R. N., Getke A. P., Solovieva N. N. — Problems of repair of heating surfaces of waste heat boilers and ways to solve them

The article considers new approaches to the repair of heating surfaces of waste heat boilers using equipment for automatic argon arc welding with small-sized heads.
Keywords: automatic gas tungsten arc welding, heating surfaces, waste heat boiler, repair of heating surfaces

UDC 615.471:66.017
DOI: 10.34641/SP.2024.1066.3.020
Samotugin S. S., Butsukin V. V., Kazak A. G., Reutsky N. M., Sheksheev M. A. — Selection of the composition of the deposited layer in the combined technology of restoration and hardening of soil-cultivating tools

To improve the performance of soil-cultivating tools, a new combined technology of surfacing and plasma surface hardening has been developed. Based on studies of the structure, hardness, abrasive wear resistance, and dynamic crack resistance, the use of low- and medium-carbon steels, as well as high-chromium cast iron, as a deposited coating is recommended.
Keywords: combined technology, plasma hardening, low- and medium-carbon steel, high-chromium cast iron, wear resistance, dynamic crack resistance

UDC 812.35.31.13.17
DOI: 10.34641/SP.2024.1066.3.021
Gadzhiev M. R., Pashkov I. N., Zakareeva K. M. — Investigation of the technological properties of fluoroborate fluxes for high-temperature brazing of drilling tools

To study the influence of flux composition and technological parameters, a methodology for evaluating the performance of fluoroborate fluxes on a cylindrical surface is proposed. An example of using a full factorial regression analysis to study the properties of fluoroborate fluxes depending on the content of components is given.
Keywords: fluoroborate fluxes, wetting, oxidation protection, brazing of drilling tools, technological properties, regression analysis

PERSONNEL TRAINING

UDC 62-529
DOI: 10.34641/SP.2024.1066.3.022
Lyalyakin V. P., Chavdarov A. V. — Modern welding and surfacing equipment for organizing the educational process at universities

The equipping of educational laboratories with automatic welding equipment in most universities does not meet the requirements set by manufacturers. The article considers the issues of developing the basic principles of layout and equipping programmable welding installations for teaching fusion welding processes in the educational process.
Keywords: welding and surfacing equipment, educational process, software equipment

UDC 21.701:658.386
DOI: 10.34641/TM.2024.263.5.035
Frolov V. A., Fedorov S. A. — Traditions and innovations in domestic higher education

The article considers the concepts of tradition and innovation and their interrelation, analyzes the foundations of traditional and innovative education, and substantiates the need to implement an innovative competency-based approach in teaching. The problems and factors complicating the determination of the optimal ratio of traditions and innovations in educational practice are presented, and the features of the innovative activity of a higher school teacher are noted.
Keywords: tradition, innovation, higher education, training, competency-based approach, innovative activity, teacher, student, university

INFORMATION

Invitation to the Weldex-2024 exhibition

Results of the XI International Industrial Forum "Territory NDT 2024. Non-Destructive Testing. Testing. Diagnostics"

* * *

V. A. Kazakov

ISSN 0491-6441

Journal "Svarochnoe Proizvodstvo"

WELDING, RELATED PROCESSES AND TECHNOLOGIES

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

Rosmould & 3D-TECH 2024

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