| SCIENTIFIC AND TECHNICAL | |
|
Yushchenko K.A., Karasevskaya O.P., Kotenko S.S., Polishchuk E.P., Savchenko V.S. and Zadery B.A. Inheritance of structure-oriented state of metallic materials by welded joints |
2 |
| Peculiarities of fusion welding of textured and oriented-solidification polycrystalline and single-crystal molybdenum, tungsten and nickel alloys are considered. X-ray examination methods were used to generate data on inheriting the structural and crystallographic orientation in different zones of a welded joint. It was found that in solidification of the weld pool the epitaxial growth of crystalline grains of the weld metal from the substrate (surface of melted grains of the fusion zone) might result in the weld metal reproducing the crystallographic orientation of structural elements of the initial material. As proved, the welded joint may retain the crystallographic orientation and structural state close to those of the base metal. | |
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Shlepakov V.N. Advanced methods for investigation, prediction and evaluation of properties of welding flux-cored wires | 10 |
| The article shows urgency of improvement of methods for prediction and evaluation of properties of welding consumables to achieve further progress in their application for mechanised and automated welding processes. | |
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Velikoivanenko E.A., Rozynka G.F. and Pivtorak N.I. Calculation algorithm for estimation of acceptable size of lack of penetration in welded joints operating under complex cyclic loading | 13 |
| Calculation algorithm for estimation of acceptable lack of penetration in welded joints under a complex set of cyclic loading (forces and momenta) at a base of 2р108 cycles is considered with respect to welded joints in frames of wind-driven power plants. The use is made of the experimental data on a range of amplitudes of six types of loads by Qj (j = 1, ..., 6), as well as numerical solution for nominal membrane and bending stresses in the weld zone, induced by single loads Qj, according to which stresses in the HAZ induced by all loads in a given loading cycle are synthesised by superposition. | |
|
Rymar S.V. Optimization of transformer with developed transversal magnetic stray fluxes | 19 |
| An optimization model of a single-phase transformer with intensive transverse stray fluxes flowing from core to core in the magnet core has been developed. The model allows calculation of transformers optimum by weight, volume and cost, both with mobile and with stationary windings, while ensuring the specified value of stray inductance. | |
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Korzh V.N. and Popil Yu.S. Producing a flame-sprayed coating using hydrogen-oxygen flame | 23 |
| Influence of the combustible mixture composition and nature of its flow on the energy state of a spraying particle is considered. Conditions are established of producing flame-sprayed coatings of materials with different melting temperatures, using hydrogen-oxygen flame, generated when burning a mixture produced by water-electrolysis generators. | |
| INDUSTRIAL | |
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Pismenny A.S., Polukhin V.V., Polukhin Vl.V., Polukhin Yu.V., Prokofiev A.S. and Udovenko V.G. Production and application of thin-walled spiral-welded pipes | 29 |
| Features of manufacturing thin-walled spiral-welded pipes, their advantages and applications are considered. | |
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Kononenko V.Ya. Technology of wet mechanized welding in construction of IRSSP "Prirazlomnaya" | 33 |
| Information is given on application of the technology of wet mechanized welding with self-shielded flux-cored wires in mounting of superblocks of IRSSR "Prirazlomnaya". | |
|
Blashchuk V.E., Shelenkov G.M. and Troyanovsky V.E. Welding of tubes with tube plates of heat-exchange apparatuses of titanium alloys | 36 |
| Results of the work on development of the technology and equipment for joining tubes to tube plates are presented. The main technological operations are described, which allow producing sound welded joints. | |
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Mashin V.S., Poklyatsky A.G. and Fedorchuk V.E. Mechanical properties of aluminuim alloys in consumable and nonconsumable electrode arc welding | 39 |
| Comparative analysis has been performed of mechanical characteristics of the joints on aluminium alloys of different alloying systems, produced by consumable and nonconsumable electrode arc welding, using batch-produced and test welding wires alloyed with zirconium and scandium. | |
| BRIEF INFORMATION | |
|
Eryomin E.N. Device for formation of weld in electroslag welding | 46 |
| New techniques, as well as equipment and fixtures are described, which are used to prevent defect formation in welds made by electroslag welding. To achieve a sound weld formation, a device signaling the surface-melting of the edges being welded is used at the start of the welding process, this ensuring transition from the stage of inducing a slag pool to the welding process proper. A device controlling the metal pool level is used to eliminate the shrinkage cavity, thus providing a sound weld formation at the final stage. | |
|
Lebedev V.A., Postolaty N.I. and Motry A.V. Multifunctional welding current source | 48 |
| A multifunctional source is described, which is manufactured by Kakhovka Plant of Electric Welding Equipment for application in different processes of welding, surfacing, cutting, including use of acrotrons. | |
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Skosnyagin Yu.A. and Lesnoj A.B. Information retrieval system "Electrodes for manual arc welding" | 49 |
| Software allowing selection of covered electrodes for manual arc welding is presented. The information system contains the most comprehensive data on electrodes (more than 500 grades) manufactured in the CIS countries. In addition to the reference information, the software provides wide possibilities for multi-parametrical retrieval on the basis of criteria set by a user. | |
| NEWS | 52 |
| Developed at PWI 9, 12, 35, 38 | |
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