Contents of the Paton Welding Journal
no.9, 2008 |
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Page |
| SCIENTIFIC AND TECHNICAL |
Yushchenko K.A., Yarovitsyn A.V. and Zvyagintseva A.V. Properties of microplasma powder welded joints on heat-resistant nickel alloys | 2 |
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It has been established that increase in the content of oxygen and nitrogen in the weld metal has a negative effect on ductility of welded joints in heat-resistant nickel alloys at a working temperature. The range of the content of oxygen and nitrogen in the weld metal, within which the quality formation of the weld and satisfactory mechanical properties of the welded joints are provided, has been determined for repair microplasma powder welding. |
Makhnenko O.V. Increase of efficiency of thermal straightening of welded thin-sheet structures on basis of mathematical modeling | 6 |
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Analysis of efficiency of different shapes of heating spots in thermal straightening of thin-sheet steel structures with buckling deformations was carried out on basis of mathematical modeling. Ratio of the volume of residual plastic shrinkage strains in plane of the sheet to the heating energy input was used as a criterion of thermal efficiency of straightening. It was shown that due to optimization of the shape of heating and its parameters efficiency of thermal straightening may be increased several times. |
Poklyatsky A.G. Influence of oxide film macroinclusions on the strength of welds in plate joints of AMg6 alloy | 10 |
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Effect of oxide film macroinclusions on mechanical properties of welds made on aluminium alloy AMg6 6-12 mm thick by TIG welding in argon atmosphere has been investigated. Dependencies of strength of the welds on surface area of such defects escaping to the surface on the side of penetration and located inside the weld have been derived. The relationships can be used to estimate the admissibility of oxide film macroinclusions in the welds in fabrication of welded structures. |
Borisova A.L., Borisov Yu.S., Adeeva L.I., Tunik A.Yu., Karpets M.V. and Burlachenko A.N. Effect of parameters of mechanical-chemical synthesis on structure, phase composition and properties of thermal spraying Al-Cu-Fe system powders containing quasi-crystalline phase | 14 |
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Composite powders containing quasi-crystalline y-phase, along with amorphous and crystalline phases, were produced from a mixture of aluminium, copper and iron powders by the method of mechanical-chemical synthesis. Subsequent annealing at 680 °C for 2 h allows increasing the y-phase content up to 96 %. |
Tsaryuk A.K., Skulsky V.Yu., Moravetsky S.I. and SokirkoV.A. Influence of electromagnetic treatment on residual welding stresses in welded joints of carbon and low-alloyed steels | 22 |
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Results of evaluation of electromagnetic effects on residual welding stresses of the I and II kind are presented. It is shown that application of low-density current pulses to low-carbon steel welded joints had a specific effect on stresses of the I kind, however, it did not lead to their substantial decrease. It is established that treatment leads to increase of the size of blocks, decrease of stresses of the II kind, and increase of the crystalline lattice parameter of weld metal. |
| INDUSTRIAL |
Kovtunenko V.A., Gerasimenko A.M., Zadorozhny V.A. and Ryndich V.V. Application of 10KhSNDA, 15KhSNDA rolled stock in metal structures of the railway-road bridge across the Dnieper river in Kiev | 26 |
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Steel rolled stock used for fabrication of critical building metal structures and bridges has been analyzed. Steels 10KhSNDA and 15KhSNDA according to TU 14-1-5120-92 developed on the basis of 10KhSND and 15KhSND steel (GOST 6713) widely applied in bridge construction, are considered. Problems of application of these steels for construction of the railway-road bridge across the Dnieper River in Kiev are outlined. |
Kuchuk-Yatsenko S.I., Shvets Yu.V., Kavunichenko A.V., Shvets V.I., Taranenko S.D. and Proshchenko V.A. Performance of flash butt welded joints on railway frogs | 30 |
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Results of investigation into performance of joints on railway frogs, made by flash butt welding through an intermediate insert of steel 12Kh18N10T, are presented. It is shown that strain hardening of austenitic components of a welded joint occurs during the operation process. This leads to levelling of hardness over the roll surface, thus limiting the local wear. Investigations of structural changes in the joint resulting from operation under cyclic loading and at a low temperature have been carried out. |
Lentyugov I.P., Ryabtsev I.A., Kuzmenko O.G. and KuskovYu.M. Metal-abrasive grinding wastes, methods of their processing and experience of application in surfacing materials | 34 |
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Methods for preparation of metal-containing grinding wastes for processing and technologies for processing metal-abrasive wastes are considered. Foreign and domestic experience in application and processing of such wastes is described. |
| BRIEF INFORMATION |
Theses for a scientific degree | 39 |
News | 41 |
| NEWS |
International Conference «Titanium-2008 in CIS» | 43 |
Fourth International Conference «Mathematical Modelling and Information Technologies in Welding and Allied Processes» | 44 |
Developed at PWI | 13
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