e9

	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�09 2019)
to russian

SCIENTIFIC-TECHNICAL SECTION

Stepanova K. V., Sleptsov O. I., Everstov �. �., Stepanov V. �., Argunova �. �. � Microstructural analysis and study of the metal deposit hardness alloyed with rare-earth elements

The article presents the results of chemical analysis, microstructural studies, hardness measurements of the deposited layers obtained by manual arc welding through the use of the welding-depositing materials containing rare-earth and rare elements from the Tomtor field and electrodes covered with UONI 13/55. The positive effect of the modifying additive with REM on the formation of a crushed structure in the zone of the metal deposit and at the fusion boundary is indicated. A slight increase in hardness in the metal deposit alloyed with rare earth metals is detected.
Key words: microstructure, hardness, deposition, metal deposit, rare-earth elements, flux-cored electrode

Saraev Yu. N., Bezborodov V. P., Perovskaya M. V., Semenchuk V. M. � Modification of the coatings structure deposited with T-590 and EN-60M electrodes on articles from 09G2S, St.3 and 12Kh18N10T steels, during deposition in the mode of low-frequency modulation of current

The paper studies the influence of the modes of arc welding electrodes T590 and EN-60M on the properties of coatings of unalloyed, low-alloy and alloy steels: St. 3, 09G2S, 12H18N10T. The influence of electric arc influence on the structure, physical, mechanical and operational properties of coatings deposited with T590 and EN-60M electrodes was studied.
It is established that this modification allows to increase the uniformity of the structure of the deposited coatings, to grind it, to increase the hardness and corrosion resistance.
It was found that the application of the method of pulsed arc welding allows to keep the previously formed strengthening phases in the coatings deposited by the electrodes T-590 and EN-60M.
Key words: electric arc deposition, properties of coatings, welding seam hardness, mechanical properties of a welded joint, structure of a welded joint

Karkhin V. A., Artinov �. E. � Comparison of the size of the long weld crater and weld pool in the solution of heat conduction problem

A task analytical solution of heat conduction after the action termination of a moving heat source for various combinations of the source and the welded body is adduced. It is shown that after turning off the source, additional melting of the base metal is possible.
For example, at laser welding with through fusion penetration of a steel plate 2 mm thick, the crater length of the seam can be 19 % longer than the steady-state weld pool length.
It is established that the center of the crater, in which the solidification of the liquid metal completes, is shifted toward the tail end of the crater relative to the axis of the heat source at the time of its termination. The speed and direction of crystallization of the molten bath metal and the crater metal are different.
Key words: heat conduction task, heat source, laser welding, molten bath crater, metal crystallization rate of the molten bath

Chudin V. N. � Pressure welding of structural parts from high-strength materials

The proposed correlation for calculating the technological modes of pressure welding.
The equations of state of the deformable material with rigid plasticity and creep plasticity are used. The ratios determine the necessary quantities of deformations, pressure and time at the stages of the process.
Key words: sediment, deformation, pressure, creep, relaxation, continuity of the material

Gavrish S. V., Loginov V. V., Petrenko N. Yu., Puchnina S. V. � Study of the brazing physicochemical processes of structural elements of the gas discharge lamps with sapphire shell

In the present work, the results of the research gas discharge lamp constructive elements those made from niobium and zirconium alloy, sealing by means of melting titanium with its alloy with nickel are presented. It is performed construction peculiarities analysis of gas discharge lamp with sapphire shell. The requirements to sealing materials are formed. It is studied physical and chemical processes occurring in materials during lamp sealing and lifetime.
Key words: gas discharge lamp, sealing, juncture, sapphire, niobium, zirconium, titanium, titanium nickelide, intermetallide, x-ray analysis

PRODUCTION SECTION

Kovalchuk V. G., Golev E. V., Khodakova �. �., Odintsov N. S. � Technological variations for argon arc and electron beam welding of shaped parts from heat resistant nickel alloy

The paper clarifies the influence of TIG and EB welding variants and highly temperature-resistant cast nickel super alloy shaped parts being in a heat-hard enable condition on mechanical properties and structure of welded joints of the combinations casting with casting and casting with deformable semi-finished product. The research trackles the problem of short-term durability ate temperature of 20 �� and long-term durability at a temperature of 650 and 1000 �C. The filler materials for argon-arc welding and relevant modes for electron-beam welding are selected. They provide a high complex of mechanical properties and an appropriate structure of welded joints.
Key words: casting, deformable semi-finished product, argon-arc welding, filler materials, electron beam welding, welding regimes parameters, short-term durability, long-term durability, structure

Lukin V.I., Kovalchuk V. G., Samorukov M. L., Kryuchkov P. A. � Friction welding of high-strength casting nickel alloy VZh172L

Technological parameters of continuous drive friction welding of cast nickel superalloy VG172L have been chosen. The alloy was welded in the same name combination and also with the deformed variant of nickel superalloy VG172, mechanical properties and structural peculiarities of produced welded were studied.
Key words: friction welding, welding parameters, short-term durability, long-term durability, structure, fracture toughness, superalloy VG172, superalloy VG172L

Sidorov S. A., Lyalyakin V. P., Mironov D. A. � The choice of the coating mode by plasma spattering on flat work surfaces

Processes of gas-thermal (plasma, detonation, gas-flame, etc.) deposition of powder coatings are widespread in industry. The article presents the development of a method of preliminary calculation of the modes of deposition of powder coatings on flat work surfaces.
The main determined (selected) parameters are the thickness of the sprayed layer, the speed of the translational motion of the part, the overlap of the applied bands, the deposition time.
The known, used in calculations, technological characteristics of installation and materials are given. A schematic diagram of the deposition of powder coating is presented.
Experimental studies confirmed the high convergence of the calculated parameters (the difference does not exceed 5�7 %).
Key words: plasma sputtering, coatings, powder materials, plasma torch

Skoblo T. S., Sidashenko A. I., Maltsev T. V., Taran A. V., Muratov R. M. � Ion-plasma strengthening through the use of piston rings

The multilayer ion-plasma coating TiN/CrN, 6 layers of CrN and 5 lauers of TiN, for hardening of piston rings is proposed. It is established that as a result of hardening, the wear rate of rings decreases 15.7 times. A new method for estimating the residual thickness of the coating, which gives recommendations for improving the quality of coatings, is proposed.
Key words: multilayer hardening, piston rings, ion-plasma coating, wear rate

ECONOMIC AND PRODUCTION ORGANIZATION

Feofanov A. N., Turapin M. V. � Organizational and methodological aspects of the automatic approach application to the risk analysis of the supplier at the designing process

This article provides an overview of organizational and methodological features of functioning automated risk analysis system of raw and material suppliers in the implementation of project activities. A modular structure of the human-machine automated risk analysis vendor system are overviewed. The features of the implementation of the risk analysis process provider in the project activities with the use of automated risk analysis system supplier of raw and materials.
Key words: risk analysis, supplier, methods of analysis, expert evaluation, automation of processes, processes information support

INFORMATION

Sarajev Yu. N., 70 years

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