CONTENTS

SCIENTIFIC AND TECHNICAL

• Makhnenko V.I., But V.S., Velikoivanenko E.A., Rozynka G.F. and Pivtorak N.I. Mathematical modelling of pitting defects in active oil and gas pipelines and development of a numerical method for estimation of permissible parameters of arc welding repair of defects ... 2
• Kalensky V.K., Chernyak Ya.P., Vasiliev V.G. and Solomijchuk T.G. Heat input influence on formation of tears in high-carbon steel building-up with austenitic wires... 9
• Ryabov V.R., Muravejnik A.N., Budnik V.P., Bondarev Andr.A., Monnin M.M., Polkin I.S., Konkevich V.Yu. and Trubkina E.M. Investigation of weldability of dispersion-strengthened Al/SiC composite material ... 13
• Zamkov V.N., Velikoivanenko E.A., Sabokar V.K. and Vrzhizhevsky E.L. Selection of temperature of preheating of y-titanium aluminide in electron beam welding ... 17
• Shlepakov V.N. and Naumejko S.M. Effect of surface tension of welding slags of salt-oxide system on characteristics of welding-technological properties of self-shielding flux-cored wire... 21
• Khaskin V.Yu., Shelyagin V.D., Garashchuk V.P., Sydorets V.N., Sakharnov A.V. and Goncharenko E.I. Laser butt welding with high-frequency heating of weld edges ... 24

INDUSTRIAL

• Lebedev V.K. and Pismenny A.A. Power systems of resistance welding machines... 28
• Efimenko N.G. and Kalin N.A. Calculation of optimum content of carbon and manganese in electrode ilmenite-type coatings ... 33
• Korotynsky A.E. Functional and test diagnostics of welding equipment ... 36
• Matvienko V.N., Stepnov K.K., Ivanov V.P., Zavarika N.G., Oldakovsky A.I. and Ermolov V.P. Mastering the technology for manufacture of cold-rolled alloyed hard-facing strip at the OJSC «llyich Mariupol Metallurgical Works» ... 40

BRIEF INFORMATION

• Mikheev P.P. and Vojtenko O.V. Role of stress concentration reduction at high-frequency peening for fatigue resistance increase in welded joints ... 42
• Tsybulkin G.A. Robust digital sensor for arc welding ... 44