Journal "Svarochnoe Proizvodstvo"ISSN 0491-6441
Contents (№04 2022)
to russian


DOI: 10.34641/SP.2022.1049.4.026
Pankov V. V., Bogorodsky I. G., Pankov S. V., Bukin V. M. — Measure the shape of the weld

Based on physical concepts of the formation of a free interfacial surface of the liquid metal of the tail part of the weld pool during fusion welding, the shape of the surface standard of the butt and fillet welds in the Cartesian coordinate system and in the parametric form is mathematically described. It is proposed to take as a measure of the shape of the surface of the weld a reference shape, determined by the numerical solution of a differential equation in a Cartesian coordinate system or in a parametric form. Numerical values calculated according to the developed equations make it possible to reproduce and store information about the standard shape of the weld surface of given dimensions for various welding materials formed in various spatial positions. It is shown by examples that the standard quantitatively calculated by the formulas objectively and unambiguously determines the measure of the shape of the surface of the weld in fusion welding at a given position in space, width, area and capillary constant.
Key words: measure of the shape of the surface of the weld, reference shape, quality of the welded joint, numerical solution of the differential equation, numerical values of the reference shapes

DOI: 10.34641/TM.2021.234.12.049
Zhidovich A. O., Stolin A. M., Chizhikov A. P., Konstantinov A. S. — Investigation of coatings obtained by electric arc surfacing in an argon atmosphere by SHS electrodes of the Ti-Co-B system

In this work, promising metal-ceramic electrodes of the Ti-Co-B system with reinforcing particles TiB2, Co2B in a titanium matrix were obtained by the method of SHS extrusion.
By the method of electric arc surfacing in an argon medium, protective coatings were applied with the obtained SHS electrodes. The phase composition and structure of the deposited coatings are investigated. It is shown that the deposited layer has a complex phase composition, and the phases TiB2 and Co2B are transferred to the coating during surfacing. The microhardness values for individual hardening particles reach 1500 HV, and the microhardness of the deposited layer exceeds the microhardness of the substrate by more than 2 times.
Key words: electric arc surfacing, metal-ceramic electrode, SHS electrode, borides, protective coating, microstructure

DOI: 10.34641/TM.2022.237.3.014
Vasiliev A. A., Osinnikov A. A., Gorsky A. I., Murzakov M. A., Grezev N. V., Ponomarenko D. V., Shiganov I. N. — Influence of heat input of hybrid laser-arc welding on the properties of low-alloy steel welds

The influence of heat input during hybrid laser-arc welding of low alloy steel of X52 and X80 gradeswith a thickness from 8 to 12 mm on the mechanical properties of the weld is considered. The optimal ratio of the input energy of the laser beam and the welding arc in the hybrid process has been established. The optimal welding speeds for hybrid laser welding with a pulsed welding arc using a fiber laser with a power of up to 10 kW have been determined.
Key words: hybrid laser arc welding, pulse arc, low alloy steel, fiber laser, heat input

DOI: 10.34641/SP.2022.1049.4.027
Lyushinsky A. V. — Influence of laser treatment of welded surfaces on the formation of diffusion-welded joints

The influence of laser radiant energy density on formation of submicron structures on the surfaces, which are subject to diffusion bonding, is demonstrated. It is established that the formation of diffusion-bonding join through these structures differs from the formation of the same join through the microroughnesses obtained by mechanical processing.
A supposition is expressed that these differences are connected with a modification of the surface by the laser emission.
Key words: diffusion welding, laser treatment, temperature, welding force, submicron structures


DOI: 10.34641/SP.2022.1049.4.028
Moskvitin G. V., Polyakov A. N., Birger E. M. — Laser welding of composite materials

This review considers the features of laser welding of the latest level of development, incl. polymer composites and metal-composites with similar and fundamentally different materials, a comparison of laser welding technology with traditional types of welding was carried out, and issues of welding with lasers of various types were considered. Examples of the application of the technology of laser welding of composite materials in various industries and important trends in the near future are given.
Key words: laser welding, metal-composites, composite materials, prospects for the development of laser welding

DOI: 10.34641/SP.2022.1049.4.029
Emelyanov M. V., Tebyakin A. V., Fokanov A. N. — Peculiarities of soldering dissimilar materials in the manufacture of X-ray tubes with a ceramic body and a beryllium exit window (review)

The methods of manufacturing brazed metal-ceramic assemblies with an output beryllium window used in X-ray equipment designs are considered. The article is devoted to the study of the possibilities of brazing dissimilar materials using metal with an output beryllium window and ceramic casing as a frame. The advantages of ceramic housings over glass housings of X-ray tubes are described. Technological methods for obtaining soldered metal-ceramic assemblies are presented. The conclusion is made about the most promising direction of research in this direction.
Key words: ceramics, windows, brazing, brazing alloy, beryllium, tightness tests


DOI: 10.34641/SP.2022.1049.4.030
Lomakin M. I., Niyazova Yu. M., Dokukin A. V., Zlydnev M. I., Garin A. V. — Evaluation of the quality of business processes of an enterprise in conditions of incomplete data

The problem of determining the lower and upper estimates of the quality indicators of business processes, the model of which is regenerating processes, on a set of distribution functions known up to the first few moments, is considered, a general solution of the problem is obtained for a specific functional that is included in most quality indicators of periodically monitored business processes, examples are given of finding lower and upper estimates of the average time of stay of a business process in an abnormal state and the readiness coefficient of a business process.
Key words: quality, quality indicators, business process, random variable, distribution function, distribution moments, control, estimates

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