e11

	Journal "Svarochnoe Proizvodstvo"	ISSN 0491-6441
	Contents (�11 2015)
to russian

SCIENTIFIC-TECHNICAL SECTION

Yakovlev D. S., Shakhmatov M. V. � Flux-cored electrode application at multiarc welding

The article presents a mathematical model of nonlinear thermal processes when multiarc welding of electric welded pipes. The developed mathematical model allows to assessing the changes in the structure of welded joints produced using flux-cored wire. Results of experimental study of influence micro alloying elements on the mechanical properties of the weld metal were presented.
Microalloying welds using flux-cored wire was tested at condition that flux-cored wire is located on one of the arcs at multiarc welding. On the basis of these results, it was shown that flux-cored wire is effective for microalloying of welds when welding pipe of high-strength steels as well as allows reduce energy welding.
Key words: multiarc welding of pipes, numerical modeling of thermal processes, flux-cored wire, mlcroalloying of welds

Khodakov V. D., Khodakov D. V. � Welding features of the equipment and piping NPP from perlitic and austenitic steels

For prolonged utilization of the heterogeneous welded joints in the assembly of the equipment and pipelines from pearlitic and austenitic steels corrosive damage took place coupled with intergranular corrosion of the metal type 10X16�25AM6, deposited with electrodes EA 395/9. The deposited metal type 02X25H13 features high corrosion resistant, is not prone to crack formation and can be recommended for the "force" pad first layer of the heterogeneous welded joints edges.
Key words: pearlitic steels, austenitic steels, intergranular corrosion, hot cracks, battering

Vinichenko M. Yu., Ishigov I. O., Krivin V. V., Sas A. V., Tyamalov �. �. � The precise mathematical model of the welding joint for a welder multimedia simulator

The article describes improvements to mathematic model of plates and welding joints of nonrotatable pipes. The model is intended to be used in multimedia welding simulator. Work is one of the results of SC "Rosatom" and NRNU MEPhl state contract (The "Computer simulator to teach the skills of welding in the manufacture and assembly of structures of power engineering" direction).
Key words: welding, pipeline, nonrotatable joint, mathematical modeling

Kopaev B. V., Tolochkov P. D. � Computational methods comparison for determining of the situation behavior determining of the junction strength model at the resistance spot welding

The role of the situation behavior at the development of a mathematical model is considered.
The comparison of methods maximum compactness (MMC) and least squares (MLS) is given for situation behavior determining of the mathematical model.
Key words: mathematical model; position and dispersion behavior; methods of maximum compactness, least squares, least modules; inadequacy error and approximation errors

Grezev N. V., Begunov I. A., Shamov E. M. � Laser hardening of gear teeth by using powerful fiber laser

The research results of the fiber lasers technological capabilities are adduced, the possibility of the steel ultra-high speeds laser heat treatment to a depth of 2 mm without melting the part surface is confirmed.
Key words: laser radiation, heat treatment, laser radiation power

PRODUCTION SECTION

Malinov V. L., Malinov L. S., Golyakevich �. A., Orlov L. N., Upyr V. N. � Crane wheels durability increasing by using a new flux-cored electrode VELTEC-N285�

The paper presents data showing the effectiveness of the quickly wears crane wheels restoration new cored wire. Veltek-N285C which providing in the weld metal structure reception of reinforced carbide metastable austenite undergoes dynamic deformation martensite transformation during exploitation loading (self-hardening effect under loading). This allows the use of internal resources of the material itself.
Key words: surfacing, flux-cored wire, crane wheels, metastable austenite, martensite, self-hardening effect

Saraev Yu. N., Gladkovskiy S. V., Golikov N. I., Veselova V. E. � Increase of the metalwares operational properties for use at low climatic temperatures conditions through the use of the adaptive pulsed arc welding methods

It is stated the research results confirmin that the application of adaptive pulse-arc welding, due to the controlled heat input in the weld material, ensures metal structure crushing, reduces the softening degree of the welding joint fusion zone, significantly increase the mechanical properties of welded joints, including constructions work at low temperature condition.
Key words: welding joint, pulse arc welding, metal structure, the heat affected zone

Kovtunov A. I., Semistenov D. A., Semistenova T. V., Starodubtsev A. D. � Features of wear resistant layers formation for mechanized pad aluminum on steel

The investigations of machine surfacing processes or heat and wear-resistance ironaluminum intermetallic alloys have been undertaken. It has been established that arc surfacing with spray aluminum transfer provides stability of surfacing process and stability of overlays chemistry and reduces their forming time. For providing of overlays formation with optimal chemistry and running ability, it was suggested to surface with aluminum wire first and then steel electrode wire.
Key words: intermetallic compound, aluminum, welding, heat resistance, wear resistance

Kozyrev V. V., Petrov M. Yu., Kozyreva L. V. � Receipt of the composite filler materials through the use of the environmentally safe technologies

Application of fuller materials for creation of the high strength coatings on part operating under abrasive wear is one of the promising ways of the resources increasing of road construction, agricultural and other types of equipment. However, in their creation process does not always comply with the environmental safety requirements, which leads to negative consequences for the natural environment and human health. The article presents the research work results of authors team created a coated powder by chemical gas-core deposition of the nickel tetracarbonyl on the alumina particles surface and its applications for receipt of the wear-resistant coatings. Metallization powder materials are carried out in a closed cycle, excluding contact workers with toxic substances and emissions of pollutants into the atmosphere, which ensures the safety of the production process. Plasma coatings obtained with the necessary physical and mechanical properties are obtained, which proves the effectiveness of the employed approach and promotes resource increase of the machines working elements, subjected to abrasive wear.
Key words: fuller materials (for welding), high-strength coating, abrasive wear, environmental safety

Rozinov A. Ya., Beskrovny A. Yu. � Complex ensuring of the working places with means assembly performing

The article presents the technical characteristics of the means of assembly such as the assembly of the wedge and screw clamps. Specifications of mechanization hydraulic assembly fluidly and pneumomechanical drive is shown. The duration graphs of the implementation assembly jig using funds characterized by different power-driven actions are presented. Nomogram of the effective scope of these tools is given. The scheme of the instrumental and transport containers for the packaging arrangement and delivery to work places of the slip assembly different means are represented too.
Key words: assembly wedges, press screws, ship hulls slip connection, hydraulic means, pneumoghydraulic means, of shock-rotational action mechanism, pneumomechanical drive, slip assembly process, thickness variation, assembly efforts, power inputs, assemble duration, application area, quantity and nomenclature range of assembly means, instrumental and transport containers

INFORMATION

Suslov An. �. � 2nd International specialized exhibition of the machine vision "Vision Russia Pavilion & Conference � 2015"

BIBLIOGRAPHY

Contents of the foreign journals on welding

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

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