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	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�01 2023)
to russian

WELDING, RELATED PROCESSES AND TECHNOLOGIES

DOI: 10.34641/TM.2022.240.6.036
Zhdankova D. S., Timofeev P. A., Timofeev A. N. � Carbon and silicon carbide fibers used for reinforcing ceramic matrix composite materials

This article discusses the main types of foreign citizens intended for armament of ceramic composite materials (CCM) for products of rocket-space and aviation equipment. On the observance of methods for the formation of reinforcing preforms based on silicon carbide proteins.
Key words: reinforcement fiber, ceramic matrix composite materials, rocket and space and aviation technology

SCIENTIFIC AND TECHNICAL SECTION

DOI: 10.34641/SP.2023.1058.1.001
Kulikov V. A., Sobko S. A., Ageev K. A. � Features of the formation of seams in multibeam welding of stainless steel plates

The work is devoted to determining the parameters of modes and heat input of single-beam and multi-beam welding with through penetration of plates made of steel 12Kh18N10T.
Key words: electron-beam welding, heat input, multi-factor experiment planning, multibeam welding, beam splitting, longitudinal and circular welds, through penetration

DOI: 10.34641/SP.2023.1058.1.002
Bulkov A. B., Peshkov V. V., Korchagin I. B., Selivanov G. V. � Experimental studies of the kinetics of auto-evacuation of the contact zone during diffusion welding of titanium

The condition for obtaining high-quality joints in diffusion welding of titanium and its alloys is the formation of physical contact between surfaces free of oxide films. Cleaning of welded titanium surfaces from oxides under production conditions is possible as a result of the development of auto-evacuation of the contact gap at the heating stage and subsequent dissolution of oxides formed at the auto-vacuum stage in the metal base. The article presents the results of a study of the process of auto-evacuation of the contact gap, depending on its size and heating temperature.
Key words: titanium, embrittled layers, auto-evacuation, contact gap

DOI: 10.34641/SP.2023.1058.1.003
Korotkova G. M. � Influence of the form of alternating current during welding with a non-consumable electrode on the structure of the welded joint of aluminum alloys

Comparative results of the study of the microstructure of the weld and the fusion zone in non-consumable electrode welding of aluminum alloys on alternating current of sinusoidal and rectangular current forms are presented. It has been established that when welding with alternating current of a rectangular shape, a finer grain is formed in the weld zone and in the fusion zone than when welding with a sinusoidal current, which will positively affect the quality of the welded joint.
Key words: TIG-welding, aluminum alloys, measuring the power of an AC sinusoidal and rectangular arc, metallographic studies of the structure of a welded joint in the fusion and seam zones

DOI: 10.34641/SP.2023.1058.1.004
Melyukov V. V., Maksimov A. E., Repkin D. A. � Optimization of the thermal regime of the process of crystallization of the metal of the weld pool under spatio-temporal control

The optimal control problem of solidification processes of weld material is formulated when the weld pool form is preset as ellipse form. It is elaborated the algorithm of solution of heat and solidification control problem.
Key words: solidification cracking, methods of optimal control, inverse problem, maximum principle

PRODUCTION SECTION

DOI: 10.34641/SP.2023.1058.1.005
Frolov A. V., Grunina N. Yu. � Universal two-step trajectory of the welding torch

The paper analyzes the recommended trajectories of the welding torch when making a welded joint, and also develops a unified mathematical description of these trajectories � a parametric mathematical model of a universal two-step trajectory of the welding torch when making welds. The model allows you to flexibly configure various parameters, which allows you to describe most types of welding torch trajectories recommended when making welds of various spatial positions and varying complexity.
Key words: welding torch, travel trajectory, mathematical model, two-step trajectory

DOI: 10.34641/SP.2023.1058.1.006
Sitnikov B. V., Marshub V. P. � Improvement of arc welding of aluminum alloys by electromagnetic methods

The article discusses the physical and technological features of arc welding of aluminum alloys with a non-consumable electrode in a magnetic field of a rectilinear currentcarrying conductor (MPCT) located above the tail of the weld pool, in the plane of the welded joint, perpendicular to the electrode.
Key words: welding, arc, non-consumable electrode, argon, aluminum alloys, seam, pores, oxide films, contact conductor, current, magnetic field, mixing, strength, tightness

DOI: 10.34641/SP.2023.1058.1.007
Gorsky A. I., Murzakov M. A., Vasiliev A. A. � Technological methods of combating pore formation during laser welding of high-alloy austenitic steel

In this paper, some technological methods for combating pore formation during laser welding of high-alloy austenitic steel are considered. In particular, the effect of shielding gas type, focus positions of the laser beam, welding speed and weld shape factor is considered. Macrosections and radiographic images of welds with minimum and maximum penetration depths. Graphs of the dependence of penetration depth, weld shape factor on the position of the focus and on the welding speed for various types of shielding gases are plotted. Recommendations for the elimination of internal defects in the form of pores are formulated.
Key words: fiber laser, laser welding, austenitic high-alloy steel, porosity, weld shape factor, welding speed

PRODUCT QUALITY MANAGEMENT, STANDARDIZATION. ORGANIZATION OF PRODUCTION

DOI: 10.34641/SP.2023.1058.1.008
Khismatullin M. R., Efimenko L. A., Schwartz M. V., Utkin I. Yu., Ponomarenko D. V. � Development of a neural network model of the structure formation of the metal of the OShU HAZ of high-strength pipe steels

Results of designing a model using feedforward artificial neural networks (ANN) for K60-K70 high strength pipe steels coarse-grained heat affected zone (CGHAZ) metal structure prediction are presented in the article. Script written in MATLAB software allows to plot a CGHAZ metal structural diagram as a function of steel chemical composition using saved functions of trained ANNs. ANNs were trained by experimental data on cooling rate influence on CGHAZ metal structure of pipe steels K60-K70. Prediction accuracy was experimentally evaluated using data which was not used for ANNs training.
Key words: artificial neural networks, high strength pipe steels, coarse-grained heat affected zone (CGHAZ), weldability, structure prediction

INFORMATION

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