The Paton Welding Journal 2004 #02

Makhnenko V.I., Zhudra A.P., Velikoivanenko E.A., Dzykovich V.I. and Bely A.I.
Mathematical modelling of the process of manufacture of spherical fused tungsten carbide granules.
Possibility of developing mathematical dependencies relating basic parameters of the process of manufacture of spherical tungsten carbide granules by melting of the tip of a tungsten carbide rod rotating at a high speed is considered.
Gretsky Yu.Ya. and Maksimov S.Yu.
Increase in stability of arc, burning under water, in flux-cored wire welding.
The results of studies conducted in a special chamber to simulate deep-water flux-cored wire welding conditions are given. The efficiency of introducing activating additions to the wire composition to stabilize the arc operating at high depths is shown.
Kuchuk-Yatsenko S.I., Kharchenko G.K., Zagadarchuk V.F., Falchenko Yu.V. and Mazanko V.F.
Formation of structure of joints in resistance and flash-butt welding.
Comparative analysis of peculiarities of formation of pipe steel joints made by flash and resistance butt welding was made. It is shown by the investigations performed that the presence of a melt layer in a butt joint leads during upsetting to the development of an extensive zone of volumetric interaction, minimum distortion of leneage structure and insignificant decrease in metal density in the butt.
Pinchuk N.I. and Ryazantsev N.K.
Effect of primary structure of cast heat-resistant nickel alloys on formation of hot cracks during welding.
Effect of primary structure and phase composition on weldability of cast nickel alloys containing up to 6 % aluminium is considered. The positive effect of two-phase primary structure containing an increased amount of aluminium eutectic with the gamma-phase (Ni3Al) is shown. Investigation data on alloy JS6-U of conventional casting and oriented solidification, as well as on new alloy LJ1-I, used for manufacture of welded gas turbine rotors are presented.
Antonyuk S.L., Korol V.N., Molyar A.G., Zamkov V.N. and Topolsky V.F.
Fatigue resistance of welded joints of experimental titanium alloy T-110.
Strength and fatigue characteristics of TIG and EB welded joints in experimental (a + b) titanium alloy T-110 of the Ti-Al-Mo-V-Nb-Fe-Zr system have been evaluated. TIG welding has been performed with an edge preparation and through penetration of plates with and without use of filler wire of the SP15 grade. Values of mechanical properties were compared with respective characteristics and also the life of welded joints of commercial alloy VT22.
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.
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.
Korotynsky A.E.
Improvement of energy efficiency of resonant welding sources based on modular structures.
Peculiarities of operation of the resonant-type welding equipment based on a modular principle are considered. It is shown that this approach allows energy consumption to be decreased and also reliability of operation of the equipment to be substantially improved. Simplified calculation of the transition process in module on-off is given and it is shown on its base that the disturbances by current in welding circuit are eliminated as a result of a dynamic mutual compensation.
Basov G.G., Tkachenko A.N., Tkachenko S.A. and Korsunov K.A.
Air-plasma cutting in fabrication of locomotive parts at "Luganskteplovoz HC".
The paper describes the experience of application of air-plasma cutting instead of gas-oxygen process in manufacture of thick parts at a blanking-welding shop of OJSC "Luganskteplovoz Holding Company".
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.
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.
Shchetinin S.V., Stepanov K.K. and Zavarika N.G.
Surfacing of dipping drums of galvanising units.
Technology for strengthening of dipping drums of a galvanising unit by deposition of a chrome-nickel layer ensuring high wear and corrosion resistance of deposited metal is described.
Nedoseka A.Ya., Nedoseka S.A., Yaremenko M.A., Elkin A.A., Kurbatov Yu.F. and Vasiliev A.S.
About continuous monitoring of liquid ammonia storages.

Brief information on the development and successful application of diagnostic acoustic-emission system for continuous monitoring of welded structures is presented.
Strizhakov E.L., Khakhin N.A., Batsemakin M.Yu. and Khokhlov D.S.
Automated unit for magnetic-pulse welding.
The paper describes the block-diagram of a three-channel unit for magnetic-pulse welding of shell sheet structures. Advantages are demonstrated compared to a single-channel unit.

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