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Information × Registration Number 0219U100115, 0115U006678 , R & D reports Title Studying of features of physical and chemical processes of phases interactions and structurization in nonequilibrium thermocinetical conditions at formation of ingots, welded joints and coatings on surfaces of products from steels and metal alloys popup.stage_title Head Grigorenko Georgy M., Доктор технічних наук Registration Date 24-01-2019 Organization E.O.Paton Elektric Welding Institute National Academy of scinces of Ukraine popup.description2 A structure-phase composition of carbon steels of building, transport and special military designations has been investigated at the E. O. Paton Electric Welding Institute. Simulation of thermal-deformation state of metal using “Gleeble - 3800” system allowed plotting thermal-kinetics diagrams and determining the peculiarities of austenite transformation, effect of carbon on kinetics of its decay and temperature phase transformations. Increased content of carbon in these steels allows forming the welded joint structures consisting of tempering martensite, acicular ferrite and lower bainite in the heat effect zone and decrease of silicon content in the welds up to 0.5 wt.% permits rising cold crack resistance of welded joints. All these facts provide high indices of strength and impact toughness of welded joints of mentioned steels. There were developed the calculation mathematical model and software, which allows plotting thermal-kinetics diagrams and predicting structure state by calculation. It is well agreed with generated bulk of experimental data and can be used for determination of modes of repair welding of steel structures, from which due to specific conditions of operation (vessels of nuclear reactors, tower constructions, bridges etc.) it is impossible to produce the samples for investigations. Product Description popup.authors popup.nrat_date 2020-04-02 Close