Special features and causes for operational damage in welded components of high-temperature diaphragms are considered. Comparative testing was performed of welding-technological properties of some commercially available coated electrode grades for welding heat-resistant steels of Cr-Mo and Cr-Mo-V compositions. Implant procedure and welding of Tekken technological samples were used to assess the delayed fracture susceptibility of 15Kh12VNMF + 15Kh1M1FL steel welded joints at application of selected electrodes. It is established that to ensure a high cold cracking resistance of these steel welded joints, it is necessary to apply preheating at 200-250 °C. Proceeding from the data of measurement of metal hardness in welds and HAZ of welded joints and weld metal impact toughness, an optimum mode of heat treatment of 15Kh12VNMF + 15Kh1M1FL steel welded joints was determined. It is shown that a softening zone of lower hardness forms in the HAZ metal structure of 15Kh12VNMF steel, in which the samples fail at testing for static tension at working temperature of 570 °C.

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Pilot Plant of Welding Equipment is the leading production facility of Science-Technology Complex «E.O. Paton Electric Welding Institute». From the moment of the start of its operation in 1959, the main objective of the Plant was optimization of the technology of manufacturing new welding equipment, developed by scientists of the Electric Welding Institute. Over the past years, the Plant produced a lot of unique equipment-from high-precision small-sized units used for welding in space, up to high-power automated machines of «Styk», «Sever» type, for instance for flash-butt welding of large-diameter pipes, for welding longitudinal welds of pipes under the conditions of automated manufacturing, etc. At present the Plant focuses on manufacturing reliable welding equipment fit for operation under any production conditions. Today manufacturing of special-purpose welding and surfacing equipment, including automatic equipment, by special orders from major users takes up a considerable share of production. PPWE was the first to master batch production of inverter equipment in Ukraine. The Plant has good prospects of economic, and production development, and its products enjoy high consumer demand. Your enterprise has been successfully developing over the recent years. What promoted or contributed to beginning of intensive growth? Strategy of enterprise development was elaborated for long-term perspective. Our goal was to become the leaders in the production of welding equipment in Eastern Europe. To reach this goal, radical reconstruction of the Plant capacities was performed, modern market of welding equipment was analyzed, and priorities in the range of manufactured products were determined. Starting from the moment of its founding up to 1990, the Plant serially produced classical welding equipment (transformers, semi-automatic machines, rectifiers). Over all these years, hundreds of thousands of equipment pieces were manufactured for enterprises from almost all continents of the world. Over the next years, despite the instability of economic situation in the country, the Plant management always invested into enterprise development and brought together a team of professionals, literally «living in their business». This brought its results and today we occupy a significant part of the market of welding equipment and consumables in Ukraine and outside it. Over the last decade, production volumes increased almost

According to the algorithm of a developed comprehensive analytical solution method (CASM), a new cast high-temperature corrosion-resistant nickel alloy ZhS3LS-М has been developed for manufacture of all-cast nozzle appliances. The developed alloy is characterized by the high-temperature strength 975 40 s = 180-200 MPa at the level of the industrial non-corrosion-resistant alloy VZhL12E as well as technological weldability and corrosion resistance at the level of commercial weldable corrosion-resistant alloy ZhS3LS. 24 Ref., 11 Tables, 1 Figure.