Contents of the Paton Welding Journal
no. 5, 2010 |
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Page |
 Contribution of Welders into Great Victory |
2 |
SCIENTIFIC AND TECHNICAL |
Yushchenko K.A., Savchenko V.S., Chervyakov N.O. and Zvyagintseva A.V. Probable mechanism of cracking of stable-austenitic welds caused by oxygen segregation |
5 |
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Current concepts of the nature of formation of cracks classified as ductility-dip cracks in multilayer welds or HAZ of steels and alloys with single-phase structure have been reviewed. It is noted that the mechanism of formation of such cracks is a subject of discussion. A hypothesis of the probable influence of oxygen on the processes of intergranular fracture is set forth, as oxygen decreases cohesion strength of grain boundaries in the established temperature range and leads to intergranular fracture. |
Makhnenko V.I., Velikoivanenko E.A., Rozynka G.F. and Pivtorak N.I. Improvement of method for estimation of the risk of fracture within the thinning zone on walls of main pipelines |
10 |
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It is shown that application of the mathematical models, which are based on elimination of such assumptions as direct normals and a plane stress state, in deformation of the thinning zone in pipeline walls and presence of one local critical point with extreme (determinate) fracture conditions allows revealing the effect of peculiarities of an internal or external defect on a limiting pressure, as well as behaviour of a material within the deformation range from the beginning of plastic flow to fracture. |
Gajvoronsky A.A., Poznyakov V.D., Sarzhevsky V.A.,Vasiliev V.G. and Orlovsky V.Yu. Influence of thermodeformational cycle of hardfacing on the structure and properties of railway wheels at their reconditioning |
15 |
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Influence of preheating temperature on delayed fracture of HAZ metal has been assessed. It is established that in order to ensure a high resistance to delayed fracture, preventing cold cracking in the joint HAZ metal, the cooling rate w6/5 should not be higher than 5 °C/s. In this case it is necessary to apply preheating at the temperature above 200 °C. |
Maksymova S.V., Khorunov V.F. and Zelinskaya G.M. Structural state of rapidly quenched Cu-Ti system brazing filler metal |
19 |
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It has been established that the strip of a rapidly quenched brazing filler metal is in the amorphous state with a uniform distribution of alloying elements in its width. Temperature ranges of transition of the brazing alloy from the amorphous to crystalline state have been determined. X-ray examination of phase composition of the rapidly quenched strip in the initial state and after isothermal annealing has been conducted, the d-CuTi and g-CuTi crystalline structures being identified in the latter case. |
Nazarenko O.K. and Zagornikov V.I. Influence of working distance of welding electron gun on weld geometry |
23 |
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Geometry of electron beam penetrations in a wide range of gun to workpiece distances was experimentally studied. A weak correlation was established between the gun to workpiece distance and penetration depth in thick metals. The possibility of substantially increasing of working distance without a marked change in the penetration parameters is attributable to a corresponding decrease of the convergence angle of the beam within the workpiece region. |
INDUSTRIAL |
Paton B.E., Lobanov L.M., Nedoseka A.Ya., Fedchun A.Yu., Yolkin A.A. and Obodovsky B.M. Reliability of welded structure operation. Assessment and control |
27 |
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The paper presents the technology and instrumentation for NDT of the condition of welded structures with assessment of breaking load and residual life. The predicted breaking load and residual life are determined during operation at working load. Application of the system in control of equipment at Odessa Priportovy Zavod is described. |
Akhonin S.V., Belous V.Yu., Romanyuk V.S., Stesin V.V. , Veliky S.I., Semenenko A.V. and Polishchuk A.K. Narrow-gap welding of up to 110 mm thick high-strength titanium alloys |
34 |
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A method was developed for narrow-gap welding of thick titanium alloys (20–110 mm), having the following advantages: decrease in requirements to edge preparation, reduction of costs for preparatory operations, lowering of angular distortions and residual welding stresses in welded joints, and saving of welding wire and electric power, while ensuring a high quality of the welded joints. Guaranteed fusion of side walls of the groove with the weld is achieved due to application of the controlling transverse alternating magnetic field. |
Mashin V.S., Pashulya M.P., Shonin V.A. and Klochkov I.N. Consumable electrode pulsed argon-arc welding of sheet aluminium alloys |
38 |
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Technological features of consumable electrode pulsed argon-arc butt welding of 1.0–2.8 mm thick sheet aluminium alloys AMts, AMg2, AMg6, 1915T1 and AD33T1 were studied. The effect of welding modes on geometrical parameters of welds, their macrostructure and mechanical properties of welded joints is shown. Recommendations on welding technology are given. |
Kononenko V.Ya. Application of method of dry underwater welding in repair of underwater passages of gas and oil pipelines in Russia |
42 |
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Application of dry underwater welding in repair of underwater passages of main gas and oil pipelines across rivers is considered. A new specialized mobile diving complex, designed for repair main gas pipelines of 1020 and 1220 mm diameter at the depth from 2 up to 30 m using the dry underwater welding, passed the full-scale tests, is described in detail. |
BRIEF INFORMATION |
Kuchuk-Yatsenko S.I., Kharchenko G.K., Smiyan O.D., Falchenko Yu.V., Zagadarchuk V.F. and Butkova E.I. Hydrogen distribution in flash-butt welded joints on steel 10G2FB |
47 |
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Peculiarities of hydrogen distribution in flash-butt welding of steel 10G2FB were studied. It was found that the nature of hydrogen distribution in contact zone is defined by the upsetting value. |
News |
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OJSC «Mezhgosmetiz-Mtsensk» - on a way of mastering production of all welding consumables relevant in the market |
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NEWS |
10th International Specialized Exhibition «Welding and cutting» |
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