| SCIENTIFIC AND TECHNICAL | |
|
GOLOVKO V.V. MODELLING OF COMPOSITION OF NON-METALLIC INCLUSIONS IN WELD METAL OF HIGH-STRENGTH LOW-ALLOYED STEELS | 2 |
| Experiments on validation of adequacy of the developed computer software for prediction of the amount and composition of non-metallic inclusions (NMI) in the low-alloyed steel weld metal are described. In addition to modelling of the final amount and composition of NMI, this software allows also the calculation of characteristics of the inclusions which are contained in the weld pool metal in a pre-solidification period of its existence. | |
|
GOLODNOV A.I. ALLOWING FOR RESIDUAL STRESSES IN THE CROSS-SECTIONS OF COMPRESSED I-SHAPED COLUMNS DURING THEIR DESIGN | 7 |
| A procedure has been developed for evaluation of the stress-strain state of I-shaped steel columns at all the stages of loading, including the hypercritical region. Design has been performed allowing for the fields of residual stresses, arising in the cross-sections of these columns. | |
|
KRIVCHIKOV S.Yu. and ZHUDRA A.P. EFFECT OF CARBON-CONTAINING MATERIALS OF FLUX-CORED WIRE ON TRANSFER OF CARBON INTO THE MOLTEN POOL DURING SURFACING | 10 |
| Results of investigations of transfer of carbon into the molten pool during surfacing using self-shielded flux-cored wire are given. The effect of the type of a C-containing material of the core of a flux-cored wire on peculiarities of its melting, values of the coefficient of transfer of carbon into the deposited metal and its concentration in the latter has been established. | |
|
BORISOV Yu.S., BORISOVA A.L., PANKO M.T., ADEEVA L.I., KOLOMYTSEV
M.V., SHAKHRAJ A.A. and SLADKOVA V.N. PECULIARITIES OF STRUCTURE OF QUASICRYSTALLINE Al-Cu-Fe SYSTEM COATINGS PRODUCED BY THERMAL SPRAYING METHODS | 12 |
| The effect of methods and conditions of thermal spraying on structure and phase composition of coatings of the Al-Cu-Fe system alloy powders has been investigated. It is shown that the maximum y-phase content of the coatings can be produced by the method of air-gas plasma spraying. In this case the thermal spray coatings inherit the multi-phase nature of initial powders. Preheating of the substrate prior to spraying allows the y-phase content of the coatings to be increased. | |
| INDUSTRIAL | |
|
SEMENOV S.E., RYBAKOV A.A., KIRIAN V.I., FILIPCHUK T.N.,
GONCHARENKO L.V., VASILYUKV.M., KLIMONCHUK R.V., STETSKIV M.V.
and VLASYUK F.S. EXPERIMENTAL EVALUATION OF THE STATE OF METAL OF LONG-SERVICED WELDED OIL PIPELINES | 17 |
| Results of comprehensive investigations of samples of pipes cut out from oil pipelines, including hydraulic tests of a pipe section to fracture, are given. Factors of long-time force loading were found to have a low effect on mechanical properties and safety factor for ductility of materials, as well as on preservation of a high structural strength of pipelines after a long-time operation. | |
|
KALENSKY V.K., DVORETSKY V.I., BUGA V.M. and SEMENIKHIN A.V.
DEVELOPMENT OF MATERIALS AND TECHNOLOGY OF MANUFACTURE OF SINGLE-ROLLER SUPPORTING MEMBERS OF BRIDGES USING SURFACING | 22 |
| The flux-cored wires have been developed for submerged arc surfacing of working surfaces of rollers and plates of single- roller supporting members (SRSM) of bridges with a layer of high-strength steel of the 30Kh13MN grade, which is resistant to the atmospheric corrosion. The technology of manufacture of SRSM using surfacing allows their life to be extended 3 times to make it equal to the life of the bridge. Plants of the E.O. Paton Electric Welding Institute are manufacturing SRSM on the commercial scale. | |
|
LEBEDEV V.A., PICHAK V.G. and SMOLYARKO V.B. PULSED WIRE FEED MECHANISMS WITH PULSE PARAMETER CONTROL | 27 |
| The paper analyses the features of design of pulsed wire feed mechanisms based on quasi-wave converters. It is shown that the maximal acceleration voltage achieved in the pulse can be essentially increased by cascade connection of several modulators or by changing the modulating pulse frequency. Conditions are determined under which the mechanism designs will be optimal in terms of both their manufacture and adjustment of the output parameters. The main principles of designing new types of pulsed feed mechanisms are defined that allow for the features of their mounting in the mechanised arc welding equipment. | |
|
NESTERENKO N.P. and SENCHENKOV I.K. CLASSIFICATION OF WAVEGUIDES SHAPED AS BODIES OF REVOLUTION FOR ULTRASONIC WELDING OF POLYMERS AND COMPOSITES ON THEIR BASE | 34 |
| The paper presents a classification and systemic method of selection of the configuration of waveguides shaped as the bodies of revolution, that are used as tools for ultrasonic welding of polymers and composites on their base. Known and new basic configurations of sonotrodes which can be used for producing large-diameter circumferential weld, are considered. | |
|
IVANOVA O.N. 10 YEARS OF THE INTERNATIONAL ASSOCIATION "WELDING". | 38 |
| BRIEF INFORMATION | |
|
PISMENNY A.S. SYNTHESIS OF INDUCTION SYSTEMS FOR WELDING AND BRAZING OF PIPE JOINTS BY USING PRESET DISTRIBUTION OF POWER IN THE WELD ZONE | 41 |
| Method of synthesis of electromagnetic field and design of inductor, realized in use of impedance boundary conditions and preset distribution of specific power at the workpiece surface being heated are described. | |
|
VASILISHIN S.A. STRAIGHTENING OF ELECTRODE WIRE USING AUTOMATIC DEVICES | 44 |
| Types and peculiarities of technological processes of straightening of metallic materials from bundles are described. Designs of straightening cases and differences in their operations are considered. The modified design of the straightening case is suggested, which makes it possible to set different schemes of its adjustment depending upon the diameter and type of a material being straightened. | |
| PWI TECHNOLOGIES. | 47 |
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