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Copyright of Automatic Welding / Avtomatitcheskaia Svarka is the property of International Association Welding (Paton Publishing House) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The technological concept of welding high-strength steels with the yield strength over 1200 MPa is proposed and scientifically substantiated, which consists in combination of pulsed-arc MIG welding and application of a high-alloy wire of Cr – Ni – Mn alloying system. The structured information on the peculiarities of the thermal cycle and its influence on the structural transformations in HAZ and weld metal was obtained. The notion of the course of physical and metallurgical welding processes depending on basic parameters of standard and forced welding modes was developed. Their positive effect on mechanical properties of welded joints was established. [ABSTRACT FROM AUTHOR]

The prospects for application of the methods of arc and plasma-powder surfacing, in order to increase the crack resistance of copper parts, are shown, proceeding from the results of literature analysis. Selection of promising materials was performed for deposition of copper-resistant layers on copper surfaces by these methods. Comparative evaluation of physico-mechanical properties of copper and the main alloying elements of promising surfacing materials was performed. [ABSTRACT FROM AUTHOR]

The results of evaluation of real condition of cast iron railing of the Kotzebue Bridge and the opportunity of welding application for its restoration are presented. According to the instructions SRP 2007.4.1 on carrying out restoration works on the cultural heritage objects, an expert examination of the disassembled elements was carried out, the lists of defects were compiled and the complex of investigations on identification and weldability of cast iron was carried out. It was established that the peculiarities of weldability of such cast iron are predetermined by its pearlite structure, carbon content, gas saturation, penetration of corrosion products deep into base metal, low ductility, as well as tendency to formation of cementite, ledeburite and welding stresses in HAZ metal. The principles of minimizing the influence of these factors on weldability were developed. The approach to selection of welding method and welding consumables was mastered. It was established that the mechanized method of welding using selfshielding high-nickel wire of grade PANCH-11 meets mostly the specified requirements. On its basis, the technology for restoring integrity of all the main architectural and decorative elements of railing (grates, emblems and cornices) was developed and implemented in the author’s accompaniment. 7 Ref., 2 Tab., 7 Fig. [ABSTRACT FROM AUTHOR]