Donets’k, Ukraine
Donets’k, Ukraine

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Klyukvin M.B.,Metinvest Group | Ordin V.G.,Metinvest Group | Matrosov Y.I.,Bardin Central Research Institute for The Iron And Steel Industry | Loskutov A.Y.,Khartsyzsk Pipe Plant | And 5 more authors.
Metallurgist | Year: 2012

The effect of pipe processing on mechanical properties is studied for rolled plate 15.3, 18.4, and 22.0 mm thick of X80 steel during manufacture of LSAW gas pipes 1219 mm in diameter in relation to thickness and as-supplied condition of the rolled sheet (controlled rolling or controlled rolling + tempering at 620 C), and direction of sample selection (transverse or longitudinal). It is shown that final mechanical property formation occurs in pipe processing and depends on a combination of rolled product thickness, as-supplied condition, shape of stress-strain diagrams, and direction of sample selection for mechanical tests. © 2012 Springer Science+Business Media New York.


Klyukvin M.B.,Metinvest Group | Ordin V.G.,Metinvest Group | Matrosov Yu.I.,Bardin Central Research Institute for The Iron And Steel Industry | Levchenko V.I.,Azovstal Metallurgical Combine | And 3 more authors.
Metallurgist | Year: 2012

At the Azovstal Metallurgical Combine together with the Bardin Central Research Institute of Ferrous Metallurgy a sheet steel up to 25 mm thick alloy system, steel melting technology, and a controlled rolling regime are developed, providing preparation of mechanical properties meeting the specifications laid down for steel Kh80 pipe production. The possibility is demonstrated of producing with existing equipment thick rolled sheet for gas pipelines of considerable diameter of strength category Kh80 with high impact strength (KV at -20°C ≥ 200 J, KCV at -20°C ≥ 250 J/cm 2) and brittle failure resistance (proportion of ductile component in DWTT specimen fracture at -20°C ≥ 95%). © 2012 Springer Science+Business Media, Inc.


Matrosov Y.I.,Bardin Central Research Institute for The Iron And Steel Industry | Kholodnyi A.A.,Bardin Central Research Institute for The Iron And Steel Industry | Matrosov M.Y.,Bardin Central Research Institute for The Iron And Steel Industry | Popov E.S.,Metinvest Group | And 2 more authors.
Metallurgist | Year: 2015

The effect of accelerated cooling parameters on microstructure and hydrogen initiated cracking (HIC) is studied for thick-walled low-alloy steels of strength categories X52–X65 used for manufacturing large diameter pipes intended for operation in hydrogen sulfide media. Optimum accelerated cooling regimes are determined providing formation of a ferrite-bainite microstructure throughout the rolled product’s thickness, exhibiting improved hydrogen cracking resistance. © 2015 Springer Science+Business Media New York


Kharlashin P.S.,Mariupol State University | Kuzemko R.D.,Mariupol State University | Protopopov E.V.,Siberian State Industrial University | Feiler S.V.,Siberian State Industrial University | Kharin A.K.,Metinvest Group
Steel in Translation | Year: 2015

A method is proposed for calculating the basic parameters of a gas jet (its mean mass temperature and power) at a certain distance from the nozzle when slag melt is sprayed onto the converter’s refractory lining. On the basis of a mathematical model, the flow parameters of a complex supersonic jet are calculated, in conditions where not only gas but slag particles are injected into the working volume of a 350-t converter. The mean mass temperature and velocity are determined over the length of the gas jet. The influence of the added slag mass on the mass of added gas and on the gas jet’s temperature and speed is established, with variation in the nitrogen flow rate through the nozzle and the relative temperature in the converter’s working volume. Analysis of numerical results shows that slag injection significantly changes the interaction between the supersonic jet and the melt. Adding even small quantities of slag markedly slows the jet. © 2015, Allerton Press, Inc.


Kholodnyi A.A.,Bardin Central Research Institute for The Iron And Steel Industry | Matrosov Y.I.,Bardin Central Research Institute for The Iron And Steel Industry | Matrosov M.Y.,Bardin Central Research Institute for The Iron And Steel Industry | Sosin S.V.,Metinvest Group
Metallurgist | Year: 2016

A favorable effect is established for reducing carbon and manganese content in low-alloy pipe steels of strength categories X56–X65 on the increase in hydrogen-induced cracking (HIC) resistance of thick-rolled sheet prepared by a thermomechanical treatment regime. This effect is due to a reduction in segregation structural inhomogeneity in the axial area of sheets in the form of a solid band of high-carbon structures. © 2016 Springer Science+Business Media New York

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