Russian Metallurgy (Metally) (Russ Metall)

Publications in this journal

• Article: Temperature dependence of metal desulfuration in steelmaking units

  G. I. Kotel’nikov, A. E. Semin, R. S. Kulish, S. A. Motrenko, S. Yu. Sapunov
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  ABSTRACT: It is theoretically and experimentally shown that with the temperature increase the degree of metal desulfuration by a slag increases for unkilled iron-carbon alloys and decreases for killed steel.
  Russian Metallurgy (Metally) 05/2012; 2011(6):509-511.
• Article: Work during screw rolling

  R. M. Golubchik, D. V. Merkulov, E. D. Klempert, E. K. Medvedev, A. E. Shelest
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  ABSTRACT: A new technique is proposed to determine the specific volume work of deformation during screw rolling. Methods for determining the work of deformation in various sections of the deformation zone in a piercing mill are considered. The dependence of the work of deformation on the reduction in the deformation zone is obtained. A new approach is proposed to calculate the fracture sensitivity and the working of the structure of continuously cast round billets. The effect of the reduction ratio on the work of deformation in similar piercing mills located at OAO Pervoural’sk Nonvotrubnyi Plant and the Yuzhnotrubnyi Plant is estimated.
  Russian Metallurgy (Metally) 05/2012; 2011(5):429-433.
• Article: Stress corrosion cracking of zirconium cladding tubes: III. Effect of the alloy strength

  A. B. Rozhnov, S. A. Nikulin, V. G. Khanzhin, V. A. Belov
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  ABSTRACT: The stress corrosion cracking resistance of zirconium T110, E635, and Zirkaloi-4 alloys of different strengths provided by different mechanisms of hardening (solid solution, precipitation, and strain hardening) is studied. It was shown that the stress corrosion resistance of the tubes decreases when the alloy strength increases, in particular, at strain hardening.
  Russian Metallurgy (Metally) 05/2012; 2011(4):387-390.
• Article: Structure and phase composition of alloyed intermetallic compound Ni3Al after annealing and high-temperature creep

  T. N. Vershinina, O. A. Golosova, Yu. R. Kolobov, K. B. Povarova
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  ABSTRACT: The structure and phase composition of a VKNA-25 alloy based on the Ni3Al intermetallic compound, produced by directional solidification, and alloyed with rare-earth metals are studied in the following two states: after annealing at 1100°C and after creep at 1100°C.
  Russian Metallurgy (Metally) 05/2012; 2011(5):449-453.
• Article: Optimization of the mold parameters for casting of flat copper ingots in semicontinuous casting machines

  A. N. Smirnov, D. V. Spiridonov
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  ABSTRACT: A new mold design is proposed to decrease the number of defects in flat copper ingots cast in a semicontinuous casting machine. This design implies 1.5- to 2.5-mm concavity of the internal surface of wide plate faces in the upper part of the mold that decreases to zero in its bottom rectangular part.
  Russian Metallurgy (Metally) 05/2012; 2011(6):545-548.
• Article: Martensitic transformations in high-strength steels at aging

  V. V. Berezovskaya, O. A. Bannykh
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  ABSTRACT: The effect of heat treatment and elastic stresses on the texture of maraging NiTi-steels is studied. The interruption of the decomposition of martensite at the early stages is shown to be accompanied by the γ → α transformation, which proceeds upon cooling from the aging temperature and under elastic (σ < σ0.2) tensile stresses. The martensite has a crystallographic texture, which is caused by the evolution of hot-deformation texture as a result of quenching and decomposition of a supersaturated α solid solution.
  Russian Metallurgy (Metally) 05/2012; 2011(4):270-278.
• Article: Electrochemical synthesis of hard-alloy compositions based on tungsten carbide and an iron triad metal

  Kh. B. Kushkhov, M. N. Adamokova, V. A. Kvashin, A. L. Kardanov
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  ABSTRACT: Single and cyclic voltammetry is used to study the electrode processes that occur during electrochemical synthesis of hard-alloy compositions based on tungsten carbide and an iron triad metal in tungstate and tungstate-carbonate Na2WO4-Li2WO4-Li2CO3 (5.0–22.0 wt %) melts. The conditions of bringing the electroprecipitation potentials of tungsten, carbon, and an iron triad metal into coincidence are determined.
  Russian Metallurgy (Metally) 05/2012; 2010(8):751-758.
• Article: Fracture of metals during pulsed loading

  S. N. Buravova, Yu. A. Gordopolov, E. V. Petrov, A. V. Poletaev, D. V. Rikhter
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  ABSTRACT: Experimental modeling of the dynamic fracture of a metal caused by a flyer plate of finite sizes revealed the formation of a channel-like crack under the contact zone as a result of the focusing of side rarefaction waves. The system of coaxial cylindrical cracks that sequentially form around the channel-like crack also has a spall nature of fracture and is localized at the sites of interference of rarefaction waves.
  Russian Metallurgy (Metally) 05/2012; 2010(10):862-866.
• Article: On continuous casting of steels using pulse-periodic cooling in a mold

  A. V. Kushnarev, E. Kh. Shakhpazov, O. V. Travin, N. M. Aleksandrova, Yu. P. Petrenko, A. A. Kirichkov
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  ABSTRACT: The causes of the difficulties that appear during continuous casting of steels with a wide solidification range are analyzed. It is shown that these difficulties can be overcome using a mold design that provides a pulse-periodic change in the intensity of heat removal from the mold tube walls.
  Russian Metallurgy (Metally) 05/2012; 2010(1):24-27.
• Article: Evolution of the structure of a quenched 30KhN3T steel single crystal during cold plastic deformation

  Yu. V. Khlebnikova
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  ABSTRACT: A sequence of the structural transformations occurring in a quenched single crystal (pseudo-single crystal) of medium-carbon structural 30KhN3T steel during cold plastic deformation by rolling with a reduction of 20, 40, 60, 80, and 86% is studied by metallography and electron microscopy. It is shown that the quenched steel single crystal can be deformed by rolling at reductions that are unattainable for quenched polycrystalline steels of the same chemical composition. It is established that the laws of the structural transformations occurring during cold deformation of the pseudo-single crystal have specific features characteristic of both single crystals and polycrystals.
  Russian Metallurgy (Metally) 05/2012; 2010(10):889-894.
• Article: Effect of combined deformation on the structure and properties of copper and titanium alloys

  V. V. Stolyarov, E. G. Pashinskaya, Ya. E. Beigel’zimer
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  ABSTRACT: The effect of a combination scheme of severe plastic deformation and subsequent cold rolling or electroplastic rolling on the deformability, microstructural evolution, and mechanical properties of copper, titanium of various purities, and a titanium alloy of an equiatomic composition is studied. The combined deformation method is shown to create a number of new nanostructured and ultrafine-grained states with a high strength and ductility.
  Russian Metallurgy (Metally) 05/2012; 2010(10):904-909.
• Article: Structural-morphological transformations in titanium nickelide treated in a nitrogen plasma

  I. G. Grigorov, O. N. Ermakova, A. N. Ermakov, I. V. Misharina, Yu. G. Zainulin, S. I. Malashin, E. K. Dobrinskii
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  ABSTRACT: Powder heterogeneous mixtures produced from a titanium nickelide powder using a plasma technology are studied by electron microscopy, scanning tunneling microscopy, and X-ray diffraction. The quantitative phase composition and morphological features of the powder mixtures trapped by a vortex cyclone and the surface of a fabric filter are determined.
  Russian Metallurgy (Metally) 05/2012; 2010(1):71-75.
• Article: Energetics of steelmaking processes

  V. P. Luzgin, K. L. Kosyrev, A. E. Semin, D. A. Dosmatov
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  ABSTRACT: The basic energy indices of steelmaking processes, namely, the consumption of energy carriers, the total energy intensity, the full energy efficiency of a process, and the amount carbon dioxide released in atmosphere, are considered. The energy, ecology, and economic efficiencies of the processes are quantitatively analyzed for various alternative energy carriers during steelmaking in an ASF. The problem of sustainable development of an object in the environment is analyzed in relation to its main three parameters, namely, economics, energetics, and ecology.
  Russian Metallurgy (Metally) 05/2012; 2010(12):1178-1183.
• Article: Effect of silver, magnesium, and zirconium additions on aging of a V1469 alloy (Al-Cu-Li system)

  V. V. Istomin-Kastrovskii, V. F. Shamrai, O. E. Grushko, Yu. Yu. Klochkova, M. A. Ryazantseva
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  ABSTRACT: The structural states of 1469 alloy (Al-1.3Li-3.4Cu-0.66Mg-0.44Ag-0.1Zr) are studied. It is found that particles of the dominant strengthening phase precipitating in aging have a complex structure. The phase core is formed by heavy elements, probably, zirconium or silver. During aging, aluminum and lithium layers grow sequentially on the core with the formation of particles of the hexagonal T1 phase with lattice parameters a = 0.49 and c = 0.932 nm in the middle portion. The precipitations of the θ″ and θ′ phases are not detected. The elastic stress fields induced by lamellar precipitates are shown to organize the spatial distribution of lamellae and cause a “chessboard” effect.
  Russian Metallurgy (Metally) 05/2012; 2010(9):819-823.
• Article: Effect of the quenching temperature on the structure and deformation mechanism of a VT22I alloy

  M. Yu. Kollerov, M. B. Afonina, E. V. Shinaeva, I. A. Sharonov
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  ABSTRACT: The effect of the temperature of heating for quenching on the phase composition, structure, and deformability of a high-strength VT22I titanium alloy is studied. After quenching from a critical temperature or above, an unstable β phase forms in the structure of the alloy; upon further deformation up to 3%, this phase transforms into the α” martensite. This process occurs at low stresses (150–200 MPa) and is characterized by an increase in the internal friction of the material, which is related to the high mobility of interfacial and twin boundaries of β-phase and martensite crystals. In VT22I alloy samples quenched from below the critical temperature, a mechanically stable β phase forms; it is deformed according to a slip mechanism at sufficiently high stresses (550 MPa).
  Russian Metallurgy (Metally) 05/2012; 2010(1):62-66.
• Article: Simulation of the mass and heat transfer in a three-electrode round impoverishment furnace

  D. V. Rumyantsev, V. A. Talalov, V. V. Stepanov, M. R. Rusakov
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  ABSTRACT: A thermophysical model is developed for a three-electrode round impoverishment furnace operating with electrodes immersed in a slag melt in order to predict the operation of the impoverishment furnaces located at the Nadezhdinsk metallurgical works of the Noril’sk Nikel integrated works and to optimize their energy-technical conditions. This model provides reliable information on the temperature field in the slag bath of a furnace depending on the furnace operating schedule, the velocity and character of motion of a slag melt, the heat release in different regions of the slag melt, and (hence) the heat load applied to furnace elements. The results of calculation by this model were used to make recommendations for improving the designs of the furnaces operating at the Noril’sk Nikel integrated works and for changing their operating conditions.
  Russian Metallurgy (Metally) 05/2012; 2010(6):532-537.
• Article: Estimation of the crystallographic strain limit during the reversible β ⇄ α″ martensitic transformation in titanium shape memory alloys

  Yu. S. Zhukova, M. I. Petrzhik, S. D. Prokoshkin
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  ABSTRACT: Three methods are described to calculate the crystallographic strain limit that is determined by the maximum deformation of the crystal lattice in the reversible βbcc ⇄ α″orth martensitic transformation and ensures pseudoelastic deformation accumulation and shape recovery in Ti-Nb-Ta alloys.
  Russian Metallurgy (Metally) 05/2012; 2010(11):1056-1062.
• Article: Physical metallurgy conditions for retaining the load-carrying ability of the gas-main pipeline metal during long-term operation

  M. M. Kantor, V. N. Voronin, V. A. Bozhenov, V. G. Antonov, Yu. M. Sharygin
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  ABSTRACT: The causes and mechanisms of the failures in the operation of a gas-main pipeline that has been operating successfully for several decades are analyzed. Fractography is used to detect the presence of regions in a fracture surface that undergo brittle fracture at the stage of crack propagation. The temperature dependence of the impact toughness demonstrates that the appearance of such brittle fracture regions in the fracture surfaces forming during the operation of a gas-main pipeline is caused by high cold-shortness susceptibility of the pipeline metal. The reliability criterion for the gas-main pipeline metal consists in avoiding brittle fracture even in local volumes. The conditions that ensure the reliability of the gas-main pipeline metal consist in its low upper cold-shortness threshold temperature and high brittle fracture energy.
  Russian Metallurgy (Metally) 05/2012; 2009(4):314-321.
• Article: Al-rich portion of the Al-Hf phase diagram

  L. L. Rokhlin, N. R. Bochvar, T. V. Dobatkina, V. G. Leont’ev
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  ABSTRACT: Electrical resistivity measurements, differential thermal analysis, optical microscopy, and the deposition of hafnium compound particles from a melt are used to study the Al-rich portion of the Al-Hf phase diagram. Prominence is given to the hafnium solubility in solid and liquid aluminum. The studies show a peritectic character of the invariant reaction during the solidification of alloys with sufficiently high hafnium contents and a slight difference between the peritectic and melting temperatures of pure aluminum. The hafnium solubility in solid and liquid aluminum is shown to increase with the temperature. The hafnium solubility in solid aluminum at the peritectic temperature (maximum solubility) is 1.00 wt % (0.153 at %); the hafnium solubility in liquid aluminum at this temperature is 0.43 wt % (0.065 at %).
  Russian Metallurgy (Metally) 05/2012; 2009(3):258-262.