The paper presents the calculation methods of burnt zonal fl uxed pellets at the basis of rising strained state at their cooling on the border of zones with diff erent temperature of crystallizalization of slag content. The calculations of strained state for Kachkanar pellets with diff erent disposition of hematite and magnetite zones were carried out. It was shown that cooling of the burnt zonal pellets in the air at the border of magnetite core and hematite shell–stretching radial tenses appear and they contribute to the loss of contact between the core and the shell. It was determined that the presence of the three-zonal structure of pellets (core–hematite shell–magnetite fi lm surface) contributes to re-distribution of normal tenses at their section. The increase of thickness of magnetite fi lm surface decreases stretching tenses in radial direction at the border of the core and the shell, in the result of which the strength of pellets rises. At cooling of burnt pellets with hematite core and magnetite shell in the neutral atmosphere at the border of zones stretching normal tenses appear in tangential direction, they contribute to the reduction of strength of pellets.

The article is devoted to the steel modification process with natural materials containing barium and strontium. Using the methods of thermodynamic simulation, the authors considered the reduction process of barium and strontium with silicon and aluminum. The influence of steel treatment with barium-strontium modifiers on the structure formation and mechanical properties of steel has been studied. The research results have been implemented when smelting of steel of 25G2S and G13 grades in electric arc furnace at casting shop of OJSC “EVRAZ ZSMK”, as well as at OJSC “Yurginskii MachineEngineering Plant” when smelting of steel of 35CrGSL, 30CrGSLFL, 12ND2FCr grades using the two-slag technology. The results analysis of the production experiments has shown that a barium-strontium modifier influences the microstructure and non-metallic inclusions, as well as provides the supply increase of structural strength of steel estimated by the values of yield point, strength and impact strength at the positive and negative temperatures. To reveal the presence of barium and strontium in steel the analysis of steel structure has been done, when using the extraction replica method with the usage of transmission electron diffraction microscopy. The presence of barium and strontium in the grain capacity indicates the interaction of these elements with metallic melt having a certain influence on the structure formation of a metallic matrix.

Based on thermodynamic analysis of oxide binary and ternary systems having oxide La2 O3 as a component, the authors have formed the base of energy parameters of the theory of subregular solutions of oxide melts, coupled with an area of metal melts existence. Temperature dependences of the equilibrium constants for steel deoxidation heterogeneous reactions were established. The components solubility surfaces in oxygen-containing steel were constructed for Fe – Al – La – O – С, Fe – Ca – La – O – С, Fe – Mg – La – O – С, Fe – Si – La – O – С, Fe – Cr – La – O – С systems. Diagrams presenting complex deoxidation of steel by alloys and blends of modifi cators containing active and alloying elements: Ca, Mg, Si, Al, Cr, La are given. The analysis was made for well – deoxidized and desulfurized metal. At the typical deoxidation scheme, at witch the rare-earth metals are introduced after adding into metal of calcium, silicon and aluminum, the produced inclusions calcium are aluminate and magnesium conglomerates. They are the substrates for small fractions and actively interact with liquid components of inclusions and dissolve in it. Thus, La2O3 as an independent phase in metal inclusions was not found.

The condition of the original thermodynamic data of base chemical reactions between silicon and oxygen fl owing to form carbon monoxide and silicon dioxide have been analyzed. As a base for the parameter estimation of phase and chemical equilibrium in systems containing oxygen, the oxygen partial pressure was taken in the gas phase. The equilibrium value PSiO and PO2 was calculated for silicon alloys with values X|Si| = 0.1–1.0 at temperature range 1700 – 2300 K in a gas phase consisting of oxygen and silicon monoxide. The eff ect of the silicon oxide activity in the slag melt on the equilibrium composition of the gas phase was determined for systems “alloy – slag – carbon – dioxide”. It has been shown that temperature has the greatest eff ect on the gas phase composition at high-silicon alloys (aSi > 0.2). The diagram of phase and chemical equilibrium of Si – O – C shows that the boundaries of the monovariant SiO2 – C – gas, SiO2 – SiC – gas and SiO2 – Si – gas with a decrease in activity SiO2 in the melted slag are shifted toward higher temperatures and at a given temperature the concentration of silicon monoxide and oxygen are reduced.

The non-metallic phases in the two grades 08Cr18Ni10Ti and 03Cr18Ni10 of evacuated austenitic stainless steel have been investigated by scanning electron microscopy and EDX. The data on the composition of nonmetallic inclusions in the metal taken from the ladle, from vacuum treating machine and from CCM, as well as samples of cold rolled sheet of same metal of 1.2 mm thickness have been presented. It has been shown that in samples of 08Cr18Ni10Ti steel taken from CCM caster tundish, the non-metallic phase consists essentially of titanium nitride clusters, located within the crystals, which contain oxides of aluminum and titanium, as well as rare small globules coated with titanium oxides. The inclusions in cold-rolled sheet are arranged substantially over the entire crosssection and consist of small (5 ... 6 microns) titanium nitride crystals. Cast metal sample of titanium-free austenitic 03Cr18Ni10 steel are clean enough from nonmetallic inclusions. Non-metallic phase is represented mainly by small inclusions of calcium aluminium silicate. In the 1.2 mm thick cold-rolled sheet the non-metallic phase is represented extremely rarely by very small globules of 2...3 micron. Results of the present study have been compared with the known composition of non-metallic phase from non-evacuated similar steel grades at the same stage of processing.

The paper is devoted to the research of application of vortex technologies of the gas jets to increase the efficiency of fire-resistant coatings on the converter lining. Using numerical simulation, the authors considered the aerodynamic pattern in the working space of the unit and the features of the converter slag drop motion when supplying neutral gas through a special lance with the elements of the vortex device. The laws of slag drop motions of different size to the converter lining have been refined, as well as the dependence among the parameters of slag drop movement and the characteristics of the vortex jet has been defined. It has been established that the trajectory of the slag drops, regardless of their size is mainly determined by the degree of twist of the vortex jet. The article also shows the principal possibility of increasing the technological flexibility of the slag skull application process on the lining converter when using vortex gas jets.

The paper presents the estimation of the ecological risk from atmosphere pollution by the practical activities of the metallurgical factory OJSC «EVRAZ ZSMK» from all organized and unorganized emissions sources of manufactories: ore-preparation, agglomeration, blast furnaces, steel-smelting, rolling and foundry. It has been shown, that non-carcinogenic ecological risk of chronic intoxication is not higher than acceptable level of 75 % from all the organized sources (208 items), high risk – of 22.1 %, very high – of 2.9 %. Non-carcinogenic ecological risk from all unorganized sources (39 items) is higher than the acceptable level in 40 times. To reduce organized emissions it has been proposed to increase the height of the pipes in manufactories of ore-preparation, agglomeration and blast furnaces, to control of nose section of the Venturi’s tube and cyclone SIOT in manufactories of steel-smelting, rolling and foundry. The proposed recommendations of technological methods are cost-effective and will allow reducing the content of airborne hazardous substances and closing to achieving optimal working conditions (first class).

The paper reveals the nature of the dynamic interaction among mechanical and electric parameters of the drive when arising in mechanical part of conveyor of the sudden damages. The estimation of the possibility to use the behavior of the system of electric parameters of electric motor as a diagnosing signal is given. The joint model was formed to study the dynamic processes in the system “supplying network – anisochronous engine – belt conveyor”. The supplying network and anisochronous engine are described by the model of problem space of the fourth order with the reception on withdrawal of the moment value on the electric motor shaft. The certain moments of inertias and softness of the relationships between sections have been defi ned for the mechanical part of the belt conveyor. Using the way of the gradual separation element since the minimum moment of the inertias and sharing the moment of the inertias of these elements and softness between the nearby elements, a 3-h mass system has been received. It simulates the mechanical part of the experimental unit. The formed dynamic model was solved in ambience of Matlab Simulinc. The article also presents the received data on energy factors of the drive in dynamic processes, following the emergencies in mechanisms.

The paper presents the results of the theoretical and experimental investigation of the influence of stress concentrators on the damaging of titanium alloys. The samples of ОТ4 (α-class) and VТ3-1 (α + β-class) titanium alloys with different radii of stress concentrators have been researched. It has been also estimated the influence of stress concentration on the parameters of acoustic emission when using the samples of different radii. In the article the authors have described the graphic dependence of the material volume, getting involved into the deformation, on the distribution of maximum local stresses and the distribution diagram of the main AE parameters for the samples with different radii of stress concentrators from ОТ4 and VTЗ-1 alloys in dependence on the nominal failing stress. The results of the theoretical and experimental investigation of the influence of stress concentrators α on the damaging of ОТ4 and VT3-1 titanium alloy have been given. The research results can be used for the development of construction-diagnostic technique on the point of view of the identification of a less dangerous form of stress concentrator.

The values of migration energy of vacancy and interstitial atom in CuPt ordered alloy were calculated using the method of molecular dynamics. During migration of the vacancy and the interstitial atom mainly the Cu atoms migrate. The interstitial atom forms confi gurations in CuPt ordered alloy not typical for pure metals: excess Cu atom seek to form crowdion along the <110> direction in (111) plane containing copper atoms; in the case of introduction of Pt atom dumbbell shaped confi guration of the two Pt atoms forms in the <111> direction perpendicular to the (111) plane containing Pt atoms. The high anisotropy of interstitial atom migration has been found: interstitial atom in CuPt ordered alloy migrates, as a rule, along (111) planes containing Cu atoms. At the tension along this plane, similar anisotropy is partly observed at vacancy migration, but interstitial atom in this case migrates mainly along the axis of tension.

The work is dedicated to the recycle object control. There is a classification of recycle objects with the release of four types: recycle “by the concentration”, “by the weight”, “by the parameters”, as well as “the combined recycle”. For the first three classes of objects the structure of automatic control systems was presented, the analysis of the impact of uncertainty on the performance of the models of these systems was carried out. For recycle objects “by the concentration” the analysis of the automatic control system was done for an object without self-leveling in a straight chain with self-leveling; for the recycle objects “by the weight” and “by the parameters” the analysis of the automatic control system was carried out for an object without self-leveling in a straight chain. Numerical evaluation criterion of efficiency dependencies on the magnitude of the ratio parameters (gain and time constant) model of the object and the object of control for all occasions were received.

26 января 2016 г. исполняется 70 лет Александру Марковичу Глезеру, доктору физико-математических наук, профессору – крупному ученому и лидеру научной школы в области изучения и разработки многофункциональных материалов нового поколения.