| SCIENTIFIC AND TECHNICAL | |
| Dilthey U., Mokrov O. and Pavlyk V. Modeling of consumable-electrode gas-shielded multi-pass welding of carbon steel with preheating | 2 |
| Certain features of simulation of gas-shielded consumable-electrode multi-pass welding with item preheating are considered. The paper shows the differences of the improved model from that of single-pass welding (SimWeld program package). Weld geometry and temperature cycles obtained through simulation, are in good agreement with the experimental data. | |
| Kalina P.P., Yarovitsyn A.V. and Yushchenko K.A. Peculiarities of the microplasma powder cladding process | 7 |
| Thermal power of the arc, effective efficiency of heating of a workpiece, powder utilisation factor, geometrical parameters of the weld and coefficient of heat flow concentration in microplasma powder cladding were studied. The current and, to a lesser degree, powder consumption were found to be the main technological parameters affecting thermal characteristics of the arc. The coefficient of concentration of heat flow of the plasma arc in microplasma powder cladding is determined primarily by the diameter of the plasmatron nozzle channels, arc length and addition of powder to the arc. | |
| Patyupkin A.V. and Antonyuk D.A. Effect of alloying on cavitation-corrosion resistance of stainless steels and alloys | 14 |
| Presented is a mathematical model developed on the basis of experimental data to describe the effect of nickel and chromium equivalents on cavitation and cavitation-corrosion resistance of stainless steels and alloys. | |
| Kulik V.M., Savitsky M.M. and Bursky G.V. Evaluation of delayed fracture resistance of HAZ metal of high-strength steel with modeling of stress relaxation | 17 |
| The rationality of inducing delayed fracture with lowering of the load on a high-strength steel welded joint was substantiated and its features were studied. The effectiveness of various delayed fracture indices for evaluation of cold cracking resistance in the HAZ is considered. It is shown that for increasing the crack resistance of the joint of sheet steel 30KhGSA, it is rational to reduce the cooling rate during TIG welding, in particular by increasing the heat input, applying a moderate mode, increasing the number of passes, performing arc treatment and tempering at the temperature of 150Д200 °C. | |
| Podola N.V., Rudenko P.M. and Gavrish V.S. Algorithms for compensation of electrode wear in resistance spot welding | 23 |
| Various algorithms for compensation of electrode wear at resistance spot welding are considered, and their effectiveness is analyzed. Algorithms are proposed, which provide the required quality of welding at electrode wear under the conditions of production. | |
| INDUSTRIAL | |
| Shlepakov V.N. and Naumejko S.M. Self-shielded flux-cored wires for welding low-alloy steels | 28 |
| Advantages and disadvantages of flux-cored wires of the PP-AN60 and PP-AN62 grades developed by the E.O. Paton Electric Welding Institute are considered. Results of metallographic examinations of distribution and composition of non-metallic inclusions in metal of the welds made with wires of the oxide and fluoride types are presented. Recommendations for application of the developed wire grades are given. | |
| Tararychkin I.A. and Voskresensky A.S. Design of compression drive for longitudinal arc welding of thick-walled shells | 30 |
| It is suggested that in longitudinal welding of a thick-walled shell a system of radial forces should be applied to the shell to avoid closing of a gap as a result of development of angular deformations. It has been found that compressive forces need to be adjusted until approximately half of the groove is filled up. Dependencies for design of the pneumohydraulic compression drive are presented, and recommendations for regulation of the compressive force are given. | |
| Kornetsky O.Yu. Role of testing laboratories in providing quality control in production of welding consumables | 33 |
| Practical experience accumulated by the testing laboratory of the Open Joint Stock Company "Dneprometiz" in assuring quality of covered electrodes in compliance with requirements of ISO 9001:2000 and DSTU ISO 9001Д2001 is described. | |
| Kot A.N. New developments of concern ESAB OK AristoRod and MarathonPac for MAG welding | 36 |
| Recent developments of concern "ESAB International AB" (Sweden) in the field of coatings and packing of welding wire are considered. Advantages of offered developments are analyzed and examples of their industrial application are given. | |
| Rosert R., Alimov A.N. and Mikitenko A.M. Organizing seamless wire manufacturing in Ukraine | 38 |
| Summarized are the data on establishming in Ukraine the production of small-diameter seamless flux-cored wires for application in ship-building, manufacture of pressure vessels, laying of pipelines and fabrication of engineering structures. | |
| BRIEF INFORMATION | |
| Okhotsky V.B. Model of the process of combustion of iron in oxygen during steel cutting | 42 |
| The paper described the model of combustion of iron-base metal in oxygen, including in cutting by oxygen jets. Calculation and experimental data are in good agreement. | |
| Kiselevsky F.N. and Kolyada V.A. Application of object-oriented software package MS DirectShow for modelling of processing technical vision video signals | 45 |
| Method is suggested for calibration of triangulation optical sensors used in automation of welding processes. This method allows calibration of the sensors after mounting them on a welding unit under factory conditions. | |
| Theses for scientific degree | 47 |
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