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Information × Registration Number 0212U004925, 0107U002634 , R & D reports Title Investigation of the mechanisms of polymorphic transformations occurring in a deposited titanium layer with the synthesised carbide powder compositions added to the arc, and development of the composition of titanium flux-cored wires and cladding technology for improvement of corrosion and heat resistance of the surface of titanium alloys. popup.stage_title Head Akhonin Sergey V., Доктор технічних наук Registration Date 08-02-2012 Organization E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine popup.description2 The possibility of producing layers with corrosion- and heat-resistant properties on surfaces of the titanium parts by the argon-arc cladding method was established for the first time. A new type of the cladding consumables for titanium, i.e. based on the titanium flux-cored wire, and technology for its manufacture were developed for this purpose. Cladding on the surface of titanium was performed with the arc controlled by the transferred alternating magnetic field. The system for alloying the charge was identified, and method for production of the dispersed powder to be used in the flux-cored wire core was developed by involving the self-propagating high-temperature synthesis (SHS) process. It was established that to produce and stabilize а -structure of titanium in the deposited layer, it is necessary to add chromium compounds, such as chromium hydroxide or oxide, to a composition of the charge of the titanium flux-cored wire core. Chromium oxide was shown to be most reliable for reproduction of synthesized phase composition of the powder with the specified proportion of the components. The charge was optimized for production of the dispersed powder of the 13(50SiC-50Cr2O3)-87Ti composition by the SHS method. Parameters of the two-stage SHS process were identified to provide formation of the titanium carbide phases, titanium silicide and mixed а+в-titanium state in a final product, i.e. the dispersed powder. To prevent porosity in the deposited metal layer, the flux component based on fluorides of rare-earth metals of the SrF2-CaF2-BaF2 system was added to the charge of the flux-cored wire core. The process of control of parameters of the deposited metal layer through affecting the spatial position of the arc during cladding by the alternating magnetic field was developed. Corrosion resistance of the deposited metal under conditions close to service ones, i.e. in solutions of acids of corresponding compositions, concentrations and temperatures, as well as heat resistance of the deposited metal in a temperature range of 500 to 800 oC were investigated. Service properties of the deposited metal were proved to be at a level of the corresponding properties of alloys AT3 and VT22. Product Description popup.authors Гадзира Миколай Філіпович Никіфоров Георгій Анатолійович Прилуцький Олексій Валерійович Радкевич Ігор Анатолійович Руханський Сергій Борисович popup.nrat_date 2020-04-02 Close