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	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�9 2015)
to russian

SCIENTIFIC-TECHNICAL SECTION

Karkhin V. A., Zharkov S. V., Mikhaylov V. G. � The thermal processes alculation for the thick plates welding via a movable axially symmetric heat sources

The solution of heat conduction problem for mobile axisymmetric heat sources in a plane layer (thick plate) is considered. Analytical solutions for heating by mobile uniformly distributed annular and circular sources, as well as volume sources, randomly distributed across the thickness of the flat layer are derived. Quasi-stationary (steady) dimensionless temperature field art shown. The comparison of the calculated results and experimental thermal cycle during argon-arc welding of the steel plate is adduced.
Key words: temperature, method of sources, annular source, circular source, volume source, welding, plate, fat layer

Sholokhov M. A., Melnikov A. Yu., Razikov M. N. � Thermal deformation processes features for high strength steels welding with different forms of beveling

Thermal deformation processes features for single-arc and twin-arc welding of the joints with different shapes of beveling are researched. Based on experimental researches, it was found that all kinds of deformations are lower by using constricted shapes of beveling than by using standard beveling. Additionally, reduce the article deformation level can be reduce through the use of the twin-arc welding. According to the study results, it was noted that in the final stage of welding in the vicinity of the article edge it is necessary to make adjustments of the mode parameters for overheating effect elimenation caused by the reflection of the heat flux from the edge.
Key words: twin-arc welding, narrow beveling, high-strength steel, housing design, the angular deformation, heat flow reflection, cold crack, welding productivity

Vlasov A. F., Makarenko N. A. � Features of the electrodes heating and melting with the exothermal mixture in a deposit

Experimental methods established that the exothermic reaction on the stage of heating and melting of the electrode coatingoccur when the content in it more than 35 % of the exothermic mixture.
It presents data on the effect of the amount of exothermic mixture in the coating of the electrodes on their heating and melting. Are calculated articles heat balance of the melting electrodes with exothermic mixture of the coating. Found that the temperature 1000 K at which the exothermic reaction proceeds efficiently achieved at a distance of about 1 mm from the electrode tip.lt is proved that the introduction to the coating of the electrodes exothermic mixture to 53,4 % increases the values effective coefficient of efficiency heating: of the base metal from 0,715 to 0,815 and the electrode from 0,28 to 0,415.
Key words: electrode exothermic mixture, coating electrodes, welding, heat balance

Mikheev A. A., Zeer G. M., Koroleva Yu. P., Zelenkova E. G., Sartpaeva A. B. � The formation of the microstructure and the transition zone for steel 45 diffusion welding through a powder layer

The microstructure and properties of the diffusion joints obtained through the powder layer of the submicron nickel deposited on the metal coating at welding temperatures (0,4�0,7)Tpl. It was found that the use of sub-micron powder as an activating layer allows to obtain high quality diffusion joint at 850 �C, which is 0,6Tpl.
Key words: diffusion welding, sub-micron powders, sintering, microstructure, transition zone

Puchnina S. V. � Structural changes in materials for the glass-ceramic brazing of the niobium with sapphire

Work is devoted to the study of structural changes in the mix of sapphire with niobium at brazing solder glass-CaO-Al2O3. Shown the effect of temperature on the recrystallization process in niobium and its alloys with zirconium, on the use of the second phase in the system ��-�l2�3, on the diffusion of niobium in the glass-ceramic solder. Defined optimal soldering regimes niobium alloy with sapphire.
Key words: structure, sapphire, niobium, glass-solder, recrystallization, junction, sealed lead, second phase, alumina, calcium oxide

PRODUCTION SECTION

Zhilin P. L., Konishchev B. P., Lebedev S. A. � Welding in CO2 with additional cold addition as a more qualitative and productive process

This article presents research to improve the quality of the welding process in CO2 with additional filler wire (hereinafter DPP), served in the caudal portion of the molten bath in the cold. We investigate the effect of DPP on the quality of the resulting cushion. The results of metallographic investigations of welded joints, as well as testing the impact strength In the end, if you use DPP the quality of the weld is significantly higher when the best appearance of the weld, increasing the efficiency of the process.
Key words: MAG welding, semi-automatic welding, additional cold wire, welding with additional wire, carbon steel, increasing of welding seam quality, decrease of welding deformation, macromicroscopic examination, increasing of welding productivity, impact test, hardness test

Sosnovskiy I. A., Kuznechik O. O., Kurilenok A. A., Belotserkovskiy M. A., Grigorev E. G. � Induction centrifugal facing of charge on the basis of tin bronze powder with the addition of finely dispersed boehmit

A method for the induction centrifugal fasing of the charge on the basis of the medium dipersibility tin bronze powder with the addition of finely finely dispersed Boehmite, which is an intermediate product for receipt of the nanodispersed modifier ((α-Al2O3). Distinctive property of this method is possibility to receive the nanodispersed modifier and its uniform distribution in the liquid phase coating through the welding modes creation providing a chemical transformation in the charge contained intermediate product in the nanodispersed modifier. The results of metallographic researches and tribe-technical tests of these coatings are adduced. Optimum amount of Boehmite content (2�3 %) in the charge, providing after induction centrifugal deposit highest antifriction and wear-resistant properties rates of coatings based on tin bronze is experimentally established.
Key words: induction centrifugal facing, tin bronze powder, modifier, tribe-technical tests, wear resistance

Filonov A. V. � The means of the gas nozzle fixing on the welding torch

The design features of the existing gas nozzle fixing on semi-automatic welding torches are considered. Pros and cons of existing design decisions from a position of manufacturing technology and operation are considered.
Key words: welding torch, torch gas nozzle, welding automatic

Grigoryants A. G., Shiganov I. N., Micyurov A. I., Mikhaylov V. S., Malov I. E., Kolomeets N. P. � Development of technology and new equipment for ultrasonic impact treatment of welded joints

In this paper new technologies and equipment for ultrasonic impact treatment (UUT) products in mechanical engineering are discussed. The design of new equipment and specifications are presented.
The technology and the results of stress relieving after welding, cladding, pressure treatment and other operations are described.
Key words: stress, ultrasonic shock treatment, equipment, technology

Tsumarev Yu. A., Ignatova E. V., Latypova E. Yu., Latun T. S. � The bend influence on the stresses concentration in soldered joints

The stress state of the plates with stress concentrators as an offset through holes is considered.
It is shown that the maximum stress value depends in considerable degree on bend presence has a significant effect of bends, which may be due to eccentric load application or mechanical heterogeneity of the product. Finite element analysis of the stress-strain state for soldered lapped joints of different types is carried out and it is shown that the maximum stresses in the soldered joints can be reduced by a factor of 1,4 due to the partial elimination of bend.
Key words: lapped joints, stress concentration, soldered joint, solid connection, bend, eccentric loading, mechanical heterogeneity

Bigus G. A., Vybornov A. P. � Extension possibility of the vessels operational life working under pressure at disclosure of defects in welding joints

In article the questions connected with operability determination of the vessels and devices which are working under pressure, fulfilled the calculation resource, are considered. Engineering approach for facility operability valuation in cases of defects detection in the welding joints exceeding the most admissible size is offered. As an example the steel vessel in which unacceptable defect is found is considered. Definition possibility of operability conditions for the facility in this case is shown.
Key words: diagnostics, operability, welded joint defect, coefficient of tension

ECONOMIC AND PRODUCTION ORGANIZATION

Bukhalkov M. I., Kuzmin M. A. � The content and objectives of innovation activity in manufacturing plants

The article describes the content and objectives of the development of innovation in modern machine-building enterprises, is a list of the main types of innovation projects.
Key words: innovation, innovation facilities, innovative processes, the effectiveness of innovation., innovation potential

EDUCATION AND TRAINING

Vybornov A. P., Maslov B. G., Spiridonov O. V. � Control and measuring materials (KIM) for quantitative valuation of the technicians knowledge, skills and practics in the field of machine building

Currently, qualified personnel are required for employers in mechanical engineering. It is expedient lo establish a quantitative valuation of specialist knowledge, skills and practices to guarantec the employer correct relationship with technician specialist. Developed measurement and control materials allow to make such valuation for personnel of the "hot" professions (casting welding) and for personal of the "cold" specialties (machining, machine assembly). The general structure of such materials is considered KIM features for "hof" and "cold" specialties are adduced.
Key words: quantitative valuation, qualification, test, "hot" treatment, "cold" treatment

BIBLIOGRAPHY

Contents of the foreign journals on welding

Patents of the Russian Federation for inventions in the field of welding

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