Publications in 2004

Articles

Paton B. E., Lebedev V. A., Pichak V. G., Urumbaev B. Ya., Khudojnazarov A. A. and Saidov A. N. Application of PSh107 type semi-automatic machines of a modular design for welding, surfacing and cutting of steels and aluminium // Paton Welding Journal. – 2004. – № 2. – Р. 29

The paper deals with the main aspects of application of a broad series of various-purpose semi-automatic machines of a unified modular design, developed from the basic model of semi-automatic machines of PSh107 type and designed for welding, surfacing and cutting. These machines were put into operation at the Tajik Aluminium Plant. Typical processes, using new semi-automatic machines, as well as their service conditions, are described. Rationality of integrated implementation of the semi-automatic machines, developed using common basic components, is substantiated and confirmed. These machines are shown to have wide capabilities in terms of technological application and further upgrading.

Ryzhov R. N., Kuznetsov V. D. and Malyshev A. V. Application of six-pole electromagnetic system for control of weld formation parameters in non-consumable electrode welding // Paton Welding Journal. – 2004. – № 2. – Р. 41

Principle of operation and advantages of design of a specialized torch with a six-polar electromagnetic system are described. Using the property of superposition, both axial and transverse resultant magnetic fields were induced in the zone of welding. Results of experimental investigations of the effect of the parameters of welding with electromagnetic actions on the geometrical characteristics are given.

Grigorenko G. M., Golovko V. V., Grabin V. F. and Kostin V. A. Effect of metallurgical characteristics of flux on structure and phase composition of high-strength weld metal // Paton Welding Journal. – 2004. – № 3. – Р. 7

It was established that reduction in oxygen potential of a welding flux promotes a change in the content of alloying elements in acicular ferrite and decrease in size of inclusions forming in low-alloy high-strength weld metal. In use of fluxes with a low oxygen potential the integrated deoxidation by aluminium and titanium leads to the decrease in molybdenum content in the acicular ferrite and increase in the brittle fracture resistance of the weld metal.

Grigorenko G. M., Kostin V. A., Golovko V. V. and Grabin V. F. Effect of chemical inhomogeneity on the formation of acicular ferrite in high-strength weld metal // Paton Welding Journal. – 2004. – № 4. – Р. 2

It is shown that the role of non-metallic inclusions in the formation of acicular ferrite is associated with the formation around non-metallic inclusions of regions of a solid solution with an increased content of nickel and manganese and different dislocation structure. Chemical composition of weld metal and different degree of a chemical inhomogeneity in the distribution of austenite-forming elements depend on the change in oxygen potential of the flux and adding of elements of deoxidizers (Al, Ti and Al + Ti) into it.

Ryzhov R. N., Semenyuk V. S. and Titov A. A. Peculiarities of formation and crystallization of welds in TIG welding with magnetic arc deflection // Paton Welding Journal. – 2004. – № 4. – Р. 14

Results of experimental study of the efficiency of application of longitudinal and transverse oscillations of arc, as well as non-reversing and reversing oscillation-rotation movements of arc for control of the processes of formation and crystallization of welds in non-consumable electrode welding are presented. The nature of experimental curves obtained allowed determination of the region of optimum values of parameters of arc deflection and formulation of recommendations for practical application.

Lebedev V. A., Kuzmin I. S., Novgorodsky V. G. and Tkachenko V. A. Device for single-button adjustment of operating modes of a semi-automatic welding machine // Paton Welding Journal. – 2004. – № 5. – Р. 36

The paper presents one of the methods of construction of operating modes controllers for mechanized arc welding equipment with arc voltage feedback. It is shown that semi-automatic welding machines, operated for a long time, can be upgraded at minimum engineering and hardware costs. This allows improving the welder's labour conditions and welded joint quality.

Lebedev V. A. Procedure of selection of parameters for pulsed feed of electrode wire // Paton Welding Journal. – 2004. – № 6. – Р. 46

Some known methods for selection of the main parameters of the mechanism for pulsed feed of electrode wire are analyzed. Procedure for calculation of parameters of pulsed control of electrode metal transfer, based on energy characteristics of mechanized arc and electrode wire feed processes, is considered. It is proved that at selection of the parameters of pulsed motion of electrode wire it is necessary to take into account the limitations determining the stability of the arc process with a pulsed feed.

Dragan S. V., Kvasnitsky V. V., Romanchuk N. P.,Solonichenko Yu. V. and Goloborodko Zh. G. Welding and cutting processes in shipbuilding of Ukraine // Paton Welding Journal. – 2004. – № 8. – Р. 2

Welding technologies used for the fabrication of ship structures at the shipyards of Ukraine are reviewed. Prospects for improvement of assembly-welding processes in shipbuilding are outlined.

Serbin S. I., Kvasnitsky V. V., Goloborodko Zh. G.,Matvienko M. V. and Buryakov A. V. Modelling of gas phase composition in plasma cutting of ship hull steels // Paton Welding Journal. – 2004. – № 8. – Р. 11

Two plasma-chemical systems, namely air low-temperature and air-vapour plasma, are considered. In keeping with the kinetic diagram, including 258 reactions, the design method was used to determine the composition of the gas phase in weight fractions of the components.

Kuchuk-Yatsenko V. S., Shvets V. I., Chvertko P. N., Gordan G. N., Sakhatsky A. G. and Remenyak I. P. Flash-butt welding of dispersion-hardened copper alloy of Cu-Al2O3 system // Paton Welding Journal. – 2004. – № 11. – Р. 2

Technological process of flash-butt welding of dispersion-hardened copper alloy AL-25 (C 15725) with a forced joint formation is considered. Data of metallographic and X-ray spectral microanalysis of microstructure and results of mechanical tests of welded joints are given.

Korzh V. N. and Popil Yu. S. Influence of hydrocarbon additives on the structure of hydrogen-oxygen flame and temperature distribution along the plume length // Paton Welding Journal. – 2004. – № 11. – Р. 32

Boundaries are determined for transition from the laminar to turbulent mode of combustion product flow in a mixture produced by water electrolyses generators, depending on additives of vapours of hydrocarbon compounds to a mixture. Considered is temperature distribution along the plume length for different modes of the flow of a jet of combustion products and additives of hydrocarbon compound vapours to the mixture. Conditions of the possible use of the hydrogen-oxygen flame are described.

Ryzhov R. N., Kozhukhar V. A., Maksimov S. Yu. and Prilipko E. A. Application of external electromagnetic actions for improvement of mechanical properties of welds in underwater wet welding // Paton Welding Journal. – 2004. – № 11. – Р. 49

Optimization of conditions of external electromagnetic actions for conditions of underwater wet welding was realized on the basis of analysis of experimental dependencies of mechanical properties of welds on induction of controlling magnetic field.