Search academic texts

Information × Registration Number 0220U103070, 0119U103451 , R & D reports Title The using exothermic mixtures efficiency Increasing in arc welding and electroslag processes. popup.stage_title Head Makarenko Natalia O., Доктор технічних наук Registration Date 24-07-2020 Organization Donbass State Engineering Academy popup.description2 Object of research - the processes occurring during heating and melting of exothermic fluxes and electrodes containing an exothermic mixture; The purpose of the study: increasing the efficiency of exothermic mixtures (in fluxes in electroslag processes and in the coating of electrodes), which increase the productivity of manual arc welding and electroslag processes, resource conservation, based on the use of the effect of exothermic reactions; Research methods: literature analysis of existing methods and research. Theoretical results: It is established that for welding of low-carbon and low-alloy steels (mainly) electrodes with low productivity (0,75 10-3 kg / s) are used, surfacing coefficients and their melting speed do not exceed, respectively, 2,4 ... 2.8 kg / A ∙ s and (3.6 ... 4.2) ∙ 10-3m / s. The insufficiency of a number of components (rutile concentrate, muscovite mica, iron powder, cellulose, etc.) necessitates the search for new components of electrode coatings. The main purpose of existing thermite mixtures is to obtain an additional source of heat, cast metal, gas, slag protection of molten metal or its refining. Exothermic reaction during melting of the electrode coating with an exothermic mixture, promotes the release of reduced iron entering the seam, increasing the productivity of the welding process, and the additional heat released accelerates the melting of the coating and the electrode as a whole. Exothermic mixtures based on scale (hematite) and aluminum powder, ferrotitanium, ferroboron, etc. are used in arc welding and electroslag processes. elements. The use of exothermic mixtures (fluxes) of the appropriate composition and the proposed new methods of melting the working flux, increase the yield of suitable metal, reduce the consumption of electricity and working flux. Scope (branch) of application: increase of productivity of manual arc welding and electroslag processes, resource saving.  Product Description popup.authors popup.nrat_date 2020-10-01 Close