Contents of the Paton Welding Journal
no.12, 2009 |
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Makhnenko V.I., Poznyakov V.D., Velikoivanenko E.A., Makhnenko O.V., Rozynka G.F. and Pivtorak N.I. Risk of cold cracking in welding of structural high-strength steels |
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Mathematical model of the risk of cold cracking in welding of structural high-strength steels is considered. The model is based on distributed data on the state of microstructure, content of diffusible hydrogen and stressed state in elementary volumes within the welded joint zone. It is shown that the model makes it possible to more precisely evaluate the local conditions of cold cracking on the basis of the above parameters. |
Gorban V.F., Kharchenko G.K., Falchenko Yu.V. and Petrushinets L.V. Investigation of joints of titanium aluminide with titanium alloy VT8 produced by diffusion welding |
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The welded joints g-TiAl (Ti—48 at.% Al) with alloy VT8 produced by diffusion welding in vacuum using nanolayered interlayers of Ti—Al system were investigated. The analysis of strength properties of a joint was carried out using microindention in the device «Micron-gamma» and also by mechanical shear tests. It was established that after diffusion welding in vacuum the initial nanolayered layer is transformed into intermetallic being in the state close to nanocrystalline one. |
Sabokar V.K., Akhonin S.V., Petrichenko I.K. and Yasinsky A.V. Pressure welding of titanium aluminide to other titanium alloys |
10 |
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The paper considers metallographic evaluation of the quality of pressure welded joints between intermetallic alloy Ti—32Al—2Cr and structural alloys VT1-0 and VT6. It is shown that pressure welding provides conditions required for producing defect-free welded joints. |
INDUSTRIAL |
Welding and Cutting 2009. Essen, Germany, 14—19 September 2009 | 13 |
Shelyagin V.D., Khaskin V.Yu., Mashin V.S., Pashulya M.P., Bernatsky A.V. and Siora A.V. Features of laser-MIG welding of high-strength aluminium alloys |
21 |
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The paper deals with the influence of the intensity of evaporation of base metal and electrode wire elements, as well as shielding gas atmosphere composition on laser radiation propagation to the metal being welded in hybrid welding of aluminium alloys. Technological features of laser-MIG hybrid welding were studied, modes were selected and the obtained results were compared with consumable electrode pulsed-arc welding. |
Zelenin V.I., Kavunenko P.M., Tisenkov V.V., Teplyuk V.M., Poleshchuk M.A., Lebed V.D., Lipisy V.I., Bondarev S.V., Gavrilov S.A., Olgard N.T. and Cheburov S.A. Application of plasma-arc metallisation for restoration of wheel pairs |
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Method for repair of journals and under-hub parts of axles of freight carriage wheels by plasma-arc metallisation is considered, results of fatigue rig tests with the recommended service life of the repaired axles are presented. |
Tsaryuk A.K., Ivanenko V.D., Volkov V.V., Mazur S.I., TrojnyakA.A., Vavilov A.V., Kantor A.G. and Volichenko N.P. Repair welding of turbine case parts from heat-resistant steels without subsequent heat treatment |
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The paper deals with the issues of repair welding of damaged case parts of turbines after long-term operation at steam working parameters. A technology of welding with pearlitic electrodes without subsequent heat treatment (high tempering) is proposed. For repair of damaged components of case equipment of turbo units from cast heat-resistant steels a technology of manual arc welding with pearlitic electrodes of E-09Kh1M type is recommended. This technology involves application of preheating and concurrent heating with subsequent thermal recovery. Welded joints made by the developed technology have high crack resistance and required mechanical properties. The proposed technology has been successfully tested in repair welding of HPC of K-300-240 turbine. |
BRIEF INFORMATION |
Lankin Yu.N. and Sushy L.F. Electrical conductivity of slag pool in electroslag welding with wire electrode |
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Equations and dependencies of electrical conductivity of the slag pool on immersion and position of wire electrode in electroslag welding are given. Results of modeling slag pool conductivity using an electrolytic bath are presented. |
News |
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NEWS |
International Conference «Improvement of Turbine Plants Using Methods of Mathematic and Physic Modelling» |
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Seminar on welding technologies «Full Readiness to Excelent Welding of Steel» |
41 |
International exhibition «Weldex/Rossvarka-2009» |
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International Scientific and Technical Conference «Problems of Welding, Related Processes and Technologies» |
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International Conference «High Mat Tech» |
48 |
Index of articles for TPWJ'2009, Nos. 1—12 |
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List of authors |
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