Journal "Svarochnoe Proizvodstvo"ISSN 0491-6441
Contents (№12 2015)
to russian


SCIENTIFIC-TECHNICAL SECTION

Khodakov V. D., Khodakov D. V. — The nature and mechanism of heterogeneous welded joints formation for atomenergy equipment from austenitic and pearlitic steels

In this work analysis results of the welded joint nature and mechanism formation from austenitic and pearlitic steels and binding with respect to the power engineering structure are adduced.
The investigation results of metals crystal structure and metallurgical processes taking place in the welding zone are adduced. Recommendations over the welding technology features, welding materials are given. Chemical composition of the used materials is specified.
Key words: heterogeneous welded joints, metall crystallization, crystal lattice, pearlitic and austenitic steels, power-engineering production

Savinov A. V., Lapin I. E., Polesskiy O. A., Lysak V. I., Krasikov P. P. — Thermoforce influence of the arc with nonconsumable electrode in mixtures of inert gases on the molten bath

The interconnection researches results between the arc pressure distribution in the welding bath with shielding gas composition and the nature of the cathodic processes are adduced. It is shown that the most favorable pressure diagram in terms of defect-free seam formation provides the use of electrodes that allows to receive the diffusive cathode spot and the helium concentration increase in the shielding gas at welding with electrode, sharpened to a cone.
Key words: arc pressure, welding bath, shielding gas, welding joint

Shatov A. P., Steklov O. I. — Faulty fusions and hot cracking formation during steel construction welding with corrosion-resistant zinc coating

The conditions of the faulty fusions and hot cracking formation in the seams at steel construction welding with zinc coating are considered. It is established that the probability of faulty fusions formation in the metal seams obtained with mechanized welding in carbonic gas via a consumable electrode increases with the thickness of the zinc coating and caused by additional heat costs of the welding arc for zinc evaporation. To avoid faulty fusions formation in the metal of these seams is recommended to fulfil correction of the welding conditions taking into account the zinc coating thickness.
The probability of hot cracks formation in the metal of welding seams obtained by manual arc welding via electrodes UONI13/55 and by mehanized welding in carbonic gas via an consumable electrode (Sv-08G2C) increases, which is caused by the formation of fusible iron-zinc interlaying along the grain boundaries. To prevent the formation of hot cracks and faulty fusions is recommended to limit the zinc coating thickness on the welded edges within 50—80 μm — for hot zinc plating and up to 200 μm — for metal spraying.
Key words: welding, welding wire, welding deposit, pores, faulty fusions, calorimetry, arc, coating

Dragunov V. K., Terentev E. V., Goncharov A. L., Marchenkov A. Yu. — Investigation of the EBW speed influence on the chemical composition, structure and properties of the alloy D16 welding joints

Experimental researches for interrelation between welding speeds in rate of 20—120 meters per hour and mechanical properties of 20-mm thickness welded joints of D16 aluminum alloy plates, obtained by electron-beam welding are made. The impact of welding speed on magnesium distributions in welded joints cross sections is researched. Welded joints microstructure researches using the optical and electron microscopy methods are performed. Hardness tests in different zones of welded joints directly after welding and after the various heat treatments are made. The "chemical composition-microstructure-mechanical properties" relationships for described welded joints are obtained.
Key words: electron-beam welding, aluminum alloy D16, welding speed, microstructure of the welding joints

Kuryntsev S. V., Gryazev N. V., Shamov E. M. — Fiber laser welding of large thickness materials with scanning beam and the use of the powder addition on nickel base

Mechanical tests and metallographic investigation of welded joints obtained by using a fiber laser in the scanning mode and a powder based on nickel as the filler material were carried out. The conclusion about this technology application to reasonability instead of labor-intensive preliminary preparation for laser welding is performed, improvement directions of the proposed technology.
Key words: laser welding, fiber lasers, scanning beam welding, fiber powder, floating clearance, mechanical properties, metallographic investigation

Orishich A. M., Malikov A. G., Shelyagin V. D., Khaskin V. Yu., Chayka A. A. — Processes optimization of the laser, microplasma and hybrid laser-microplasma welding of aluminum alloys

The investigation results of the laser, microplasma and hybrid laser-microplasma welding methods of aluminum alloys are adduced. The optimum values of the linear energy at radiation welding with CO2 laser are shown. Limitations of the microplasma welding and the main advantages of hybrid laser-microplasma welding are established. A detailed study of welding joints macro and microstructures of welds and heat affected zone (HAZ) is showed that in all cases take place sufficiently equiaxial compact dendritic structure with no visible defects.
Key words: laser welding, microplasma welding, hybrid welding, linear energy, dendritic structure

PRODUCTION SECTION

Lukin M. A. — Scientific and technical level of welding production in modern Russia

Through the process of formation and development of the welding industry in Russia and the Soviet Union during the second half of the 19th century to 2013. Studied the causes of the crisis in the industry of modern Russia and proposed several measures to ensure the preservation and development of Russian science and technology capacity Welding.
Key words: welding, production welding, equipment in Russia and the USSR

Sidlin Z. A. — Problems of the welding wire quality for the electrodes manufacture

Materials reflecting the situation with the quality parameters provision of low-carbon and high-alloy welding wire for the production of electrodes are stated. The main problems of the electrodes production technology are considered. The technological and organizational recommendations for ensuring the required quality level of the electrode products are given.
Key words: welding wire, welding electrod, low-carbon wire, high-alloy wire

Mordynskiy V. B., Ilichev M. V., Tyuftyaev A. S. — Influence of gas-forming additives on the layers parameters during plasma powder pad

In order to protect the coating metal from oxidation during the plasma powder coating an option of process with input of gas forming addition of sodium fluoride is tested. An influence of process parameters and of addition rate on the geometry of coated layers of nickel-chromium and chromo manganese alloys during their formation.
Key words: plasma powder coating, scoring resistance, powders for coating, sodium fluoride for gas coverage, coated layer

Strizhakov E. L., Neskoromnyy S. V., Ageev S. O., Lemeshev S. V. — Magneticpulse welding technology features of the thin-sheet die-welded structures

According the authors of reduced weight and providing successful screening of radio board cable systems of cosmic technique interference. For solving this problem in has been developed a technology of producing lightened die — welded screened housings of Connectors by magnetic pulse welding-forming (MISF).
During the theoretical analysis and experimental investigations of MISF process were noted mechanism of welded joint formation and energetic parameters and geometric parameters while assembling witch affect joint formation quality and forming deformation stage. Based on proven investigations welded-forming equipment with MISF inductors with lightened screened housings has been designed and made.
Key words: magnetic-pulse welding-forming, electroerrosion processing, welded-forming equipment, inductor, specific energy, lightened screened connector housing

Shvedov K. M., Kozhevnikova E. V., Fedotov A. A., Pavlov A. B., Lyushinskiy A. V. — Diffusion welding facility UDV-3501

The design and operation of the new generation diffusion welding facility UDV-3501 are considered.
The facility provides a various combinations of the metallic and nonmetallic materials joining in a vacuum more than 10–5 Torr. The maximum welding temperature is 1300 °C, welding pressure to 50 000 kgf. UDV works in both automatic and manual control modes.
Key words: facility, equipment, diffusion welding, vacuum chamber, mode parameters, heterogeneous materials

ECONOMIC AND PRODUCTION ORGANIZATION

Potapov N. N., Volobuev Yu. S. — Features certification of welding personnel in nuclear and thermal power engineering

Peculiarities of systems of certification of welding personnel in nuclear and thermal power.
Recommendations for the adjustment of existing rules and regulations of the procedures for the certification of welding personnel in nuclear and thermal power.
Key words: welding personnel, level of expertise, technical regulations, the examination Committee

BIBLIOGRAPHY

Contents of the foreign journals on welding

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

Index of articles published in the journal in 2015


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