UDC 669:621.791.01:621.791.75 DOI: 10.34641/SP.2025.1070.1.001 Dolzhansky Yu. M., Kochergin S. A., Makarov A. S. — Application of ultrasonic effects in technological processes with liquid-phase working zones
The experience of applying ultrasonic effects ("sonication") of liquid-phase working media in metallurgical production and technological processes of electric arc welding is considered. It is proposed to use ultrasound in friction stir welding technology. Keywords: ultrasonic effect on liquid-phase media, metal melting, electric arc welding, friction stir welding
SCIENTIFIC AND TECHNICAL SECTION
UDC 812.35.15.01 DOI: 10.34641/SP.2025.1070.1.002 Utkin I. Yu., Kapustin O. E., Murashov N. A., Zaitseva A. A. — Determination of permissible technological parameters of manual arc welding for K70 strength grade steel based on process modeling
The influence of cooling rates characteristic of manual arc welding on the kinetics of austenite decomposition in various areas of the heat-affected zone of K70 strength grade steel is investigated. Technological parameters of the welding process are determined that ensure the values of the mechanical properties of the heat-affected zone at the level of standard values. Keywords: kinetics of phase transformations of austenite, alloying elements, heat-affected zone, mechanical properties
UDC 615.471:66.017 DOI: 10.34641/SP.2025.1070.1.003 Samotugin S. S., Reutsky N. M. — Calculation of plasma treatment modes for soil-cultivating tools
Based on the solution of the heat conduction equation in a linear formulation, a mathematical model and a method for calculating the modes of plasma treatment of a tool having the shape of a sharp wedge are developed. Keywords: plasma treatment, micro- and macro-melting, soil-cultivating tool, mathematical model of heat propagation
UDC 621.791.3 DOI: 10.34641/SP.2025.1070.1.004 Bakulin S. S., Sharonova N. I. — Features of the interaction of VPr1 solder with 12Kh18N10T steel during brazing of thin-walled pipelines
The influence of the solder on the structure of the brazed material away from the brazed seam is considered. The spreading of the solder in the form of a film and penetration along the grain boundaries of the material under the film are established. Keywords: spreading, dissolution, erosion, strength
UDC 621.791.927.048 DOI: 10.34641/SP.2025.1070.1.005 Ershov A. V., Ershov A. A. — Influence of the surface properties of welding fluxes on the shape and geometric dimensions of weld beads
The influence of the basicity of welding fluxes on the shape and geometric dimensions of weld beads is investigated. Keywords: welding, surfacing, flux, weld bead, calcination temperature
UDC 621.791.927 DOI: 10.34641/SP.2025.1070.1.006 Zarechensky D. A., Chigarev V. V., Vorobiev V. V., Shpak A. A. — Influence of the design of a flux-cored strip electrode on the dilution of the base metal in the deposited metal
The paper presents the results of comparative studies of the influence of the design of flux-cored strips on the dilution of the base metal in the deposited metal. It is established that the location of the lock joints of the flux-cored strip shell affects the penetration depth and the dilution of the base metal in the deposited metal. Keywords: flux-cored strip, lock joints, shell design, penetration depth, dilution of base metal in deposited metal
PRODUCTION SECTION
UDC 691:721.75 DOI: 10.34641/SP.2025.1070.1.007 Feofanov A. N., Ovchinnikov V. V., Smirnov S. V. — Improving the quality of double-sided needle fasteners made of titanium alloys for fixing parts made of composite materials
The features of joint formation during resistance spot welding of double-sided needle fasteners for connecting two parts made of non-metallic composite materials in a structure are studied. It is shown that in double-sided fastener joints between the needle and the plate, the formation of a permanent joint is possible due to the diffusion bonding of the metal of the welded parts. Keywords: double-sided needle fastener, resistance welding, needle, plate, titanium alloys, welding current, pulse duration, mechanical properties of joints
UDC 812.35.03.13 DOI: 10.34641/TM.2024.263.5.033 Antonov A. A., Doroshenko F. E. — Technologies for reducing welding stresses in tanks
The technological features of performing heat treatment of large-sized units of tank structures in furnaces, as well as by the local heat treatment option, are outlined. To reduce the level of residual welding stresses, it is proposed to use low-cost and effective technologies of ultrasonic impact treatment and low-frequency vibration treatment. Methods for measuring residual stresses are presented, which allow optimizing welding processes to ensure a safe level of residual stresses in welded joints of structures. Keywords: vertical tanks, welding stresses, heat treatment, ultrasonic impact treatment, low-frequency vibration treatment, stress measurement methods
UDC 621.791.75; 621.314 DOI: 10.34641/SP.2025.1070.1.008 Burlaka V. V., Gulakov S. V., Golovin A. Yu. — New directions and developments in the field of welding equipment at the Priazovsky State Technical University
The article presents the results of the work of the Scientific and Technical Center of Power Electronics of the Federal State Budgetary Educational Institution of Higher Education "Priazovsky State Technical University," Mariupol, aimed at the development and creation of highly efficient power welding equipment. Keywords: arc welding, power source, inverter, printed circuit board, welding properties, power factor
METHODS AND INSTRUMENTS FOR CONTROL AND DIAGNOSTICS OF MATERIALS AND PRODUCTS
UDC 621.791.92:620.16:669.14:621.771 DOI: 10.34641/SP.2025.1070.1.009 Butsukin V. V., Shiryaev A. V. — Investigation of the mechanical characteristics of hardened 90KhF roll steel
The results of comparative studies of the yield strength of 90KhF steel with a hardness of 45 HRC by the ball indentation method and the standard compression method are presented. High accuracy of determining the yield strength of hardened high-carbon steel by the ball indentation method is established. Keywords: mechanical characteristics, deposited part, new part, hardened steel, plastic imprint, yield strength
INFORMATION
23rd International Exhibition of Welding Materials, Equipment and Technologies. Weldex and Fastenex 2024 Exhibitions
XII International Industrial Forum "Territory NDT. Non-Destructive Testing. Testing. Diagnostics" (Territory NDT-2025)