Yu. V. Kontsevoi

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Interaction of iron and aluminum in the plastic deformation and fast heating of laminar Fe–Al composite

Yu. V. Kontsevoi, A. G. Meilakh, A. B. Shubin, E. A. Pastukhov, more

Steel in Translation > 2016 > 46 > 7 > 529-531

The influence of plastic deformation and the heating rate on the solid-phase interaction of steel strip and aluminum powder is investigated. Recrystallization of the contacting materials determines the phase formation. The layer thickness of the Fe–Al intermetallides is plotted as function of the strain and heating rate. On that basis, the parameters of the transition layer may be predicted in selecting...

article

Imparting Ductility to a Steel–Aluminum Composite Laminate in Forming Operations

Yu. V. Kontsevoi, E. A. Pastukhov, E. V. Ignat’eva, I. S. Sipatov

Metallurgist > 2016 > 60 > 5-6 > 538-546

One of the major disadvantages of corrosion-inhibiting aluminum coatings on steel is the presence of a brittle intermetallide layer between the steel substrate and aluminum coating. This paper reports results from an investigation of the problem. A manufacturing scheme based on the treatment of such laminated composites by forming operations is proposed.

article

Steel composites based on copper-clad iron powder

A. G. Meilakh, Yu. V. Kontsevoi, A. B. Shubin, E. A. Pastukhov

Steel in Translation > 2015 > 45 > 9 > 712-715

The structure and physicomechanical properties of materials produced from copper-clad iron powder with 0.3% C are investigated as a function of the sintering temperature, the copper concentration, the method of coating application, and the heat treatment of the copper coatings. The use of copper plating (0.5⎯2.0% Cu), when the reduction of the coatings is combined with the sintering of the parts,...

article

Steel-aluminum layered composite with a nanostructured intermediate layer

Yu. V. Kontsevoi, E. V. Ignat’eva, I. E. Ignat’ev, E. A. Pastukhov, more

Russian Journal of Non-Ferrous Metals > 2013 > 54 > 4 > 325-329

The results of an investigation into the influence of the degree of deformation on the structure of components of the layered steel-aluminum composite are presented. It is shown that the noticeable structural variations start from reduction ratio ɛ > 75%, or e > 1.54 in logarithmic units. The plastic deformation mechanism of a brittle intermetallic layer is described. It is shown that the viscoplastic...

article

Analysis of basic factors governing compacted powder density

I. E. Ignat’ev, Yu. V. Kontsevoi, E. V. Ignat’eva, E. A. Pastukhov

Russian Journal of Non-Ferrous Metals > 2011 > 52 > 6 > 527-531

Based on a theoretical analysis of the behavior of metal powders during compaction, basic factors governing the compacted powder density, i.e., the compaction pressure and the sizes of a powder particle and its grain, are determined. Mechanisms of the effect of these factors are considered, and a mathematical dependence for forecasting the compacted powder density is determined. According to the experimental...

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Formation of a uniform charge composed of highly dispersed and ultradispersed powders

Yu. V. Kontsevoi, I. E. Ignatiev, E. V. Ignatieva, E. A. Pastukhov, more

Metallurgist > 2011 > 54 > 11-12 > 803-807

In modern powder metallurgy, powders that are in a highly dispersed state are being used more and more to create new materials composed of powders which are dissimilar from one another. This trend has engendered a need to mix charges that are made up of powders which differ in their physico-mechanical properties. The mixing operation must be highly productive while also ensuring the disintegration...

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Conglomeration of metallic power and destruction of conglomerates

V. Ya. Bulanov, E. A. Pastukhov, I. E. Ignat’ev, Yu. V. Kontsevoi, more

Steel in Translation > 2011 > 41 > 3 > 266-269

Theoretical principles describing the formation and disintegration of conglomerates are developed and used to formulate a method for mixing nanodisperse, ultradisperse, and highly disperse powders, with simultaneous disintegration of conglomerates. The operation of the corresponding mixing equipment is described.

article

Method and device for melt low-frequency treatment

I. E. Ignatiev, Yu. V. Kontsevoi, E. A. Pastukhov, E. V. Ignatieva

Metallurgist > 2011 > 55 > 5-6 > 353-357

A method and device are described for low-frequency treatment of a melt. A vibration effect is produced in a cylindrical crucible, into which a stationary plunger is introduced for the melt treatment time and removed before crystallization. Results of vibration treatment are presented.

article

Vibroaeratic mixing of the powders in a gas medium: Report 2. Computing kinematics of a valve and powder and determining optimum sizes of mixer elements

Yu. V. Kontsevoi, E. A. Pastukhov, I. E. Ignat’ev, V. Ya. Bulanov, more

Russian Journal of Non-Ferrous Metals > 2009 > 50 > 5 > 507-512

Principles of determining the functional parameters and optimum sizes of a mixing chamber and its operating units were developed. Using the example of mixer operation at the vibration frequency f = 15 Hz and amplitude A = 0.006 m, the correction factors in the motion equation for dispersoids with open and closed valves were obtained. Graphs of the powder flow in the mixing chamber were plotted and...

article

Vibroaeratic mixing of the powders in a gas medium: Report 1. Developing a method and theoretical foundations for vibroaeratic powder mixing and destroying conglomerates

Yu. V. Kontsevoi, E. A. Pastukhov, I. E. Ignat’ev, V. Ya. Bulanov, more

Russian Journal of Non-Ferrous Metals > 2009 > 50 > 4 > 390-394

Based on the already-known theory of processes that occur with powders in the state of vibrationboiling, a new method for mixing the powder (vibroaeration) and a device for implementing it were developed. The following tasks are noted and completed: (i) qualitatively mixing powders with different granulometric compositions, including finely dispersed ones, during the complete destruction of their...

article

The computational procedure of the power and kinematic parameters of the deformation center upon rolling the multilayer systems with a dispersed layer

Yu. V. Kontsevoi, I. E. Ignat’ev, E. V. Ignat’eva, E. A. Pastukhov

Russian Journal of Non-Ferrous Metals > 2009 > 50 > 3 > 228-233

A model of rolling the multilayer system in which some layers can be powered is proposed. A computational procedure for the distribution of energy consumption over the deformation center in the presence of the powdered layer in the system is developed.

article

Method of obtaining an Al-Pb anti-friction alloy to make slide bearings

Yu. V. Kontsevoi, I. É. Ignat’ev, E. V. Ignat’eva, É. A. Pastukhov, more

Metallurgist > 2007 > 51 > 9-10 > 570-573

Slide bearings (bushings) for internal combustion engines are being made in the form of a bimetal with a steel base and an anti-friction layer composed of an alloy containing tin and aluminum. The Institute of Metallurgy in the Ural Division of the Russian Academy of Sciences has developed a new method and equipment for making an aluminum-lead anti-friction alloy to be used in the production of bimetallic...

article

Device for Self-Adjustment of the Active Gap between Rolls

Yu. V. Kontsevoi, V. Ya. Bulanov, I. É. Ignat'ev, E. V. Ignat'eva

Metallurgist > 2003 > 47 > 9-10 > 394-395

article

Features of a Technology for Aluminizing Steel Strip and Criteria of the Quality of the Coating

I. É. Ignat'ev, V. Ya. Bulanov, Yu. V. Kontsevoi, E. V. Ignat'eva, more

Metallurgist > 2002 > 46 > 11-12 > 367-369

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Search results for: Yu. V. Kontsevoi

Interaction of iron and aluminum in the plastic deformation and fast heating of laminar Fe–Al composite

Imparting Ductility to a Steel–Aluminum Composite Laminate in Forming Operations

Steel composites based on copper-clad iron powder

Steel-aluminum layered composite with a nanostructured intermediate layer

Analysis of basic factors governing compacted powder density

Formation of a uniform charge composed of highly dispersed and ultradispersed powders

Conglomeration of metallic power and destruction of conglomerates

Method and device for melt low-frequency treatment

Vibroaeratic mixing of the powders in a gas medium: Report 2. Computing kinematics of a valve and powder and determining optimum sizes of mixer elements

Vibroaeratic mixing of the powders in a gas medium: Report 1. Developing a method and theoretical foundations for vibroaeratic powder mixing and destroying conglomerates

The computational procedure of the power and kinematic parameters of the deformation center upon rolling the multilayer systems with a dispersed layer

Method of obtaining an Al-Pb anti-friction alloy to make slide bearings

Device for Self-Adjustment of the Active Gap between Rolls

Features of a Technology for Aluminizing Steel Strip and Criteria of the Quality of the Coating

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