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Information × Registration Number 0218U003638, 0116U008779 , R & D reports Title Scientifically-technological processes of welding and surfacing of metals. popup.stage_title Head Chigarev Valeriy Vasil'evich, Доктор технічних наук Registration Date 14-05-2018 Organization State Higher Educational Institution "Pryazovskyi State Technical University" popup.description2 Research Object - surfacing and welding of steels and alloys. A purpose of work - an increase of reliability of details of machines. A research method is theoretical and technological researches of processes of surfacing and welding. In work it is established that in order to prevent leakage of liquid metal from the weld pool it is necessary to carry out surfacing with displacement from the zenith by the length of the weld pool and a process of high-speed welding at low running energy with a wire electrode has been developed. It ensures an increase in the deposition and crystallization rate, grinding of the microstructure, dislocations microstrain and welding stresses, increased fracture toughness and wear resistance of the weld necks of the work rolls. Is hydrogen saturation mechanism weld pool during surfacing alloys of aluminum cored wire. The conditions of the weld pool degassing depending on the granulation of the charge and the duty ratio of the cored wire. The technique for studying the formation of an adsorption-active medium from a flux material in two stages is presented-the formation of a liquid phase and the effect of surface-active substances on the deformation of the microrelief in the formation of a welded joint. Composite copper-based alloys have been investigated and it is found that electroerosion resistance increases in the series: copper-chromium carbide, copper-molybdenum carbide, copper-tungsten carbide. The technology of surfacing of chromium-iron bronze strengthened by intermetallic compounds and composite alloys on copper current leads of electric arc furnaces has been improved. The regularities of the effect of speed on the formation and physical properties of welded joints are presented, on the basis of which a method for unilateral high-speed welding of pipes for gas and oil pipelines with a constituent electrode has been developed, due to arc motion under the action of a magnetic field in the longitudinal and transverse directions, reduces the arc, Hydrodynamic pressure, ensures the qualitative formation of seams on the flux cushion, regardless of the gap in the joint, increases the impact force and the root ozionnuyu resistance welds. Coating materials have been developed with the nitrogen to which allow to obtain a metastable austenite in the surface layer of the deposited metal. Product Description popup.authors Алістратов Валерій Миколайович Білик Олександр Григорович Гулаков Сергій Володимирович Зусін Антон Михайлович Зусін Володимир Якович Чигарьов Валерій Васильович Щетинін Сергій Вікторович Щетиніна Віра Іванівна popup.nrat_date 2020-04-02 Close