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Information × Registration Number 0222U003676, 0118U100524 , R & D reports Title Investigation of the regularities of the physical and metallurgical processes and the formation of intermetallic phases in the plasma-arc welding of the bimetal "steel-titanium" with the applied protective layers popup.stage_title Head Korzhyk Volodymyr M., Доктор технічних наук Registration Date 23-05-2022 Organization E.O.Paton Elektric Welding Institute National Academy of scinces of Ukraine popup.description2 The work provides recommendations for managing the processes of interphase interaction by minimizing energy input (up to 60-100 J / mm) and preventing the formation of brittle intermetallic phases by applying barrier layers (including bronze CuSi3Mn1) in butt welding of bimetallic plates such "titanium-steel" arc methods such as plasma, "soft plasma", SMT, P-MIG / MAG, etc. To verify these recommendations, experiments were performed on welding the butt joints of bimetallic plates "titanium-steel" according to the selected technological scheme. The analysis of the structures of the obtained compounds showed that the developed technological schemes and recommendations are satisfactory and prevent the metallurgical interfacial interaction of titanium with iron and the formation of intermetallic compounds Fe-Ti. Despite the general tendency of formation of intermetallic phases during surfacing of steel on titanium by all considered arc methods, it is determined that the method of plasma surfacing by indirect arc with conductive filler wire is the least critical to their formation and allows to obtain intermetallic layers in minimum thickness with the best quality of formation of rollers of the weld metal. The formation of intermetallic phases TiFe2, TiFe and α-Fe phase enriched with titanium in different percentages for different methods and modes of surfacing was recorded in the transition zone of titanium-steel surfacing. With low heat input, studies have shown the possibility of the formation of TiFe and Ti2Fe phases. The existence of the latter has been considered controversial to date.The created technological recommendations provide for welding of the developed edges of bimetal in 11 passes: plasma welding of titanium layer, application of one or two barrier layers for 2 passes each (with access to each of the edges), application of thin (up to 2 mm) steel layer for 3 passages (edges and the center), filling of development in a steel layer for 2 passes, drawing of Product Description popup.authors Voitenko Olexiy Mykolayovuch Hos Igor D Gryniuk Andrey A. Dem'yanov Oleksiy I Kovbasenko Hennadiy V Levchenko Larysa A Popov Valeriy V Sitkо Oleksiy I Tyshchenko Oleksandr Hagherizadeh Roodan M. Shevchenko Vitalij Yukhymovych Shcheretskyi Volodymyr Oleksandrovich popup.nrat_date 2022-05-23 Close