e12

	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�12 2022)
to russian

WELDING, RELATED PROCESSES AND TECHNOLOGIES

DOI: 10.34641/SP.2022.1057.12.084
Volkov S. S., Kobernik N. V., Remizov A. L., Pankratov A. S. � Study of the amplitude and phase errors of the sensor-support during ultrasonic welding of plastics

Research of amplitude and phase errors of the sensor support at ultrasonic weldings of plastic. In article the technique allowing to make an assessment of amplitude and phase errors of the magnetoelastic sensor support used at ultrasonic weldings of plastic is described. The analysis is necessary for detection of compliance of the used sensors of support with parameters of process of ultrasonic welding. Measuring amplitude of fluctuations of the sensor of a support it is possible to monitor change of the main physical properties of the welded polymer in the course of welding his temperature and thickness.
Key words: ultrasonic welding, oscillation amplitude of the support, static pressure, sensor support, magnetoelastic sensor, oscillation frequency, ultrasonic vibrations

SCIENTIFIC AND TECHNICAL SECTION

DOI: 10.34641/SP.2022.1057.12.085
Karkhin V. A., Levchenko A. M., Tishkov M. K., Aldaiee Y. � Estimated estimate of the temperature and time of heating the welded joint to remove hydrogen

Model for hydrogen diffusion taking into account the weld geometry and welded butt joint thickness is presented. The solution of the diffusion problem obtained by using Green's function and image methods is given. The method for estimation of the additional heating temperature and time required to reduce hydrogen concentration to a specified level preventing hydrogen-induced cold cracking is developed.
Key words: hydrogen, diffusion problem, butt joint, heating temperature, heating time

DOI: 10.34641/SP.2022.1057.12.086
Terentiev E. V., Dragunov V. K., Sliva A. P., Kozyrev Kh. M., Goncharov A. L., Borodavkina K. T. � Influence of welding speed and thermophysical properties of alloys on thermal efficiency in electron beam welding

The paper is devoted to the study of the material thermophysical properties and the welding speed influence on the electron beam welding (EBW) process thermal efficiency. The thermal efficiency for welds was determined by a computational and experimental method based on measuring the fusion zones and estimating the energy costs of melting.
It is shown that with deepmelting EBW, the thermal efficiency increases with an increase in the welding speed and a decrease in the thermal conductivity of the material being welded, and the experimental dependence of the thermal efficiency on the welding speed is well approximated by a logarithmic curve. An empirical relation is proposed to determine the thermal efficiency of the deepmelting EBW process for various materials depending on the dimensionless parameter vd/2a.
Key words: electron beam welding, thermal efficiency, deep melting welding, welding speed, thermophysical properties

PRODUCTION SECTION

DOI: 10.34641/SP.2022.1057.12.087
Feofanov A. N., Ovchinnikov V. V., Ter-Vaganyants Yu. S. � Automation of the process of gas-shielded arc welding of fasteners with panels

The results of studies of the formation of the connection of anchor nuts and studs with panels of tank structures made of steel VNS-2 and aluminum alloys AMg6, 1420 and 1565ch are presented. The destruction of the connection of the studs with the panels during the tests took place in the metal of the weld. It has been established that the use of automatic argon-arc welding of fasteners with panels of tank structures makes it possible to reduce the number of leaky structures by 2.3�3.2 times compared to manual welding. Designs of overhead welding machines for welding fasteners in panels have been developed.
Key words: anchor nuts, studs, argon arc welding, tank panels, welding automation, joint strength factor, tightness of joints

DOI: 10.34641/SP.2022.1057.12.088
Efimenko L. A., Kapustin O. E., Murashov N. A., Utkin I. Yu., Vyshemirsky E. M., Sevostyanov S. P., Muratov R. Yu. � Substantiation of the manual arc welding modes of field circumferential butt joints of pipes 1220�20 mm of strength class K80

The influence of the chemical composition of steel of strength class K80 on the kinetics of austenite decay, hardness and toughness of the near-shock area of the thermal influence zone at different cooling rates has been studied. The range of metal cooling rates during manual arc welding is shown, in which the values of mechanical properties of welded joints are provided at the regulatory level.
Key words: austenite decay kinetics, strength class, thermal welding cycle

DOI: 1034641/SP.2022.1057.12.089
Vasiliev A. A., Osinnikov A. A., Gorsky A. I., Murzakov M. A., Ponomarenko D. V., Shiganov I. N. � Features of hybrid laser-arc welding of low-alloy steels with a thickness of 16 mm

The paper presents the features of hybrid laser-arc welding of butt joints made of structural low-alloy steel of X52 and X80 grades with a thickness of 16 mm. The optimal parameters of the mode of hybrid laser welding with a pulsed arc were determined using a fiber laser with a power of up to 10 kW. The influence of the type of welding wire and grooves on the structure and mechanical properties of the weld is considered. It is shown that the cutting of edges and the use of powder wire makes it possible to obtain structures that provide the impact strength of welded joints at low temperatures that meet the requirements of regulatory documentation.
Key words: hybrid laser arc welding, pulse arc, low alloy steel, fiber laser, welding wire, microstructure, mechanical properties

INFORMATION

21st international exhibition of welding materials, equipment and technologies Weldex 2022

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Yu. V. Kazakov � 90 years old

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Nikiforov N. I.

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Alphabetical index of articles for 2022

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