bluuebunny/crossref_metadata_2025 huggingface dataset:
Modernization of Hot-Rolled Tubes Rolling Method
Authors: Pavlov D.A. , Bogatov Aleksandr Aleksandrovich , Pavlova E.A.
Published: September 2017

A new method of hot-rolled pipes rolling on the automatic tandem mill is suggested. It consists of two rolling stands. This method allows achieving the rough pipe preovalisation before reaching the automatic mill. The rough pipe preovalisation provides even groove filling and the decrease of pipe wall thickness variation. The rough pipe preovalisation will allow increasing the elongation ratio from 1.5 to 2.0 on the lengthwise rolling stand no. 1 and decreasing the elongation ratio on the piercing mill, therefore the chance of rolling skin formation on the external surface of the pipe is decreased. The way to reduce the probability of the formation of a guide mark defect due to the kinematic tension during rolling on a stub mandrel with rough tube preovalisation is investigated. The influence of the kinematic tension factor on the pipe forming in the groove taper at a lengthwise rolling with rough tube preovalisation is explored.
Resource-Saving Technology of Recycling of Wastes of Secondary Aluminium Production in a Blast Furnace in the Process of Aluminous Slag Smelting
Authors: Makhotkina E.S. , Ponomareva O.S. , Kolyada L.G.
Published: September 2017

The paper considers the theoretical and practical aspects of recycling of secondary aluminium production wastes by adding them to the burden mix in the process of aluminous slag production (from bauxites) in the blast-furnace smelting operation. The comparative analysis of bauxite chemical composition and the secondary aluminium production waste was carried out and the feasibility of using secondary aluminium production waste as a raw material for blast-furnace smelting was studied. A mathematical model was presented to obtain aluminous slag by blast-furnace smelting of bauxites with their partial substitution with the secondary aluminium production waste; this model makes it possible to calculate the rational mixture of burden materials when aluminous slag is produced in a blast furnace taking into account chemical composition of the materials used and the required content of oxides of aluminium, calcium and silicon in the final slag. The high-alumina slag formed when the wastes of secondary aluminium production are used in burden materials is characterized by low gas content during slag tapping (in spite of the elevated temperature) and by high flowability. The laboratory tests of binding properties of the high-alumina slag obtained in a blast furnace using wastes of secondary aluminium production, which were carried out by the plant laboratory, showed that the cements produced from this slag have satisfactory strength characteristics, although their setting time is somewhat longer. Recycling of slag dumps of aluminium production will make it possible to obtain new sources of raw materials, enhance the technology of handling and transportation of materials from man-made mineral formations to recycling plants without increasing the environmental load.
Stressed State of the Shaped Casting under the Impact of Hindered Contraction
Authors: Kolokol’tsev V.M. , Savinov A.S. , Tubol’tseva A.S.
Published: September 2017

The analysis of the bending deformation effect and the central tension arising from hindered contraction of the shaped casting, its stress-strained state, leading to the formation of hot cracks in it has been given in the course of the conducted work. The influence of the main casting parameters and the mold has been studied and their relationship with emerging strains in the molded casting has been determined. The impact on the quantity of the emerging strain of bending stress under hindered contraction has been defined and confirmed by practical calculations. It has been shown that the bending stress is much higher than the emerging tensile stress in the considered conditions. It has been found that the length of the element of hindering and the compliance of a moldable mixture exerts a strong influence on the stress-strained state of the shaped casting.
Surfactants Influence on Sphalerite Wetting during Zinc Concentrate Pressure Leaching
Authors: Khazieva E.B. , Sviridov V.V. , Naboychenko S.S. , Menshchikov V.A.
Published: September 2017

This paper describes an investigation of the surfactant influence on zinc sulfide wetting and the pressure leaching of zinc concentrates. For this, a variety of anionic and cationic surfactants with different chemical structures were tested. The methodology for mineral preferential wettability determination via establishing correlation between the spreading coefficients was proposed. It allows determining the surfactant potential efficiency. The influence of contrastively functional reagents on zinc concentrate pressure leaching was reviewed. It is found that simultaneous usage of stabilizers and dispersing agents allows enhancing zinc extraction, eliminating pellet formation at lower reagent consumptions. The beneficial effect of surfactant mixture was seen through the increased zinc sulfide wetting by solution and colloid protection of sulfur particles via solvate-adsorption and structural factor of stabilization. The optimal composition of surfactant mixture was proposed and allowed to extract 95 % of zinc along with pellet formation elimination.
Analysis of Efficiency of Roll Pass Design Options for Roughing Stands of Section Rolling Mill
Authors: Kinzin D.I. , Levandovskiy S.A. , Tulupov O.N.
Published: September 2017

The analysis of two roll pass design options of ten roughing stands atOJSC “MMK” 370 rolling mill has been performed. The usage of a new form of the roll grooves will allow achieving higher durability of the rolls. Lesser rolls consumption will allow saving up to 800K rubles annually. More uniform load distribution by the stands will reduce the possibility of main mill lines equipment breakdowns due to the jumps of rolling torque in the most loaded non-equiaxial stands. Better contact conditions and higher billet stability at the input into equiaxial grooves will reduce the amount of metal clogging. Moreover, a changed strain diagram – with higher roll pass design efficiency factor – will increase the roll out of foundry production defects.
Phenomenological Model of Low-Carbon Steels Hardening during Multistage Drawing
Authors: Grushko A.V. , Kukhar V.V. , Slobodyanyuk Yu.O.
Published: September 2017

The obtained phenomenological model of hardening G3Si1 and Sb08-G2S low-carbon welding wire during multistage drawing establishes the dependence of the hardening curve coefficients (hardening index and hardening modulus) on the integral tensile strain. The obtained model makes it possible to calculate the hardening curve, strength, and plasticity indicators of metal products based on the results of wire rod testing in the delivery state.
Simulation of Centrifugal Casting and Structure of Fe-Ni-Co Super-Invar Alloy
Authors: Ogorodnikova Olga M. , Chermensky V.I. , Konchakovsky I.V.
Published: September 2017

This paper is focused on multi-scale modeling of solidification and alloy microstructure evolution through computer-aided simulation of the technological processes. Microstructure characterization of cast alloy after centrifugal casting including grain size, dendrite cell size and porosity is of interest in this paper. The centrifugal technological process was simulated using special LVMFlow program for computer-aided analysis of casting technologies to predict shrinkage porosity in axi-symmetric part blanks. The cast blanks were made of Fe-Ni-Co alloy with low thermal expansion and after turning could be used as bearing parts in contact with glass or ceramics. A method of combined simulation of technological processes and operating regimes of cast components was developed. The proposed method of simulating the complicated model allows separating the component from casting geometry in CAE postprocessor and the plot distribution of calculated parameters over the component. Also, this method allows varying diameters of hollow cylindrical casting and choosing the best location of components relative to the predicted porosity in the blank for high quality turning. The distribution of temperature and porosity could be used for more precise calculation of internal stresses in cast component under loading conditions with respect to the structural factors. The structural parameter was stated on a base of the calculated temperature fields to associate grain structure of cast alloy with solidification conditions. The austenitic microstructure of Fe-Ni-Co super-invar alloy was studied on the samples, which were cut from the axi-symmetric part after turning the blank. The calculated structural parameter was assigned with the types of grain structure.
Influence of Structural Components on Strength Properties of Silicate Stone Casting Materials during Controlled Crystallization
Authors: Artemov Arseny O. , Ignatov Michael N. , Ignatova Anna M.
Published: September 2017

Study and description of positive effect influence of Cr2O3 catalyst in controlled crystallization technology for production of stone casting silicate materials are provided. The introduction of heat treatment method that influences the forming of the structural components of produced material. The basis of manufacturing stone casting silicate materials is controlled crystallization of silicate melt that is organized in such a way that nucleation occurs within the melt and the final product has a fine grain structure. The structural components of silicate stone casting materials and their influence on strength properties are determined. The strength of stone casting silicate materials is the reduction in the difference in the temperature coefficients of linear expansion of crystal phases and residual glass phase.
Determination of Frictional Forces during Wire Rod Drawing Process by Reverse Method
Authors: Platov S.I. , Nekit V.A. , Ogarkov N.N.
Published: September 2017

The article pesents the drawing process of the circular cross-section rod. The mechanical model of plastic deformation in the process of wire drawing is represented by the regularities of yielding of metal at the level of forward flow during the rolling based on theoretical solutions proposed by A. I. Tselikov. The method for determination of drawing forces was probed about by decomposing it into two problems of planar deformation and the superposition of these solutions. The results of the theoretical solution of wire drawing task were used to determine the coefficient of friction during the deformation of low carbon steel in diameter 5.5 mm by means of comparison with the known experimental results of the wire drawing efforts. Satisfactory results were obtained for evaluation of frictional forces during deformation under high plastic deformation zone conditions. The obtained values of friction coefficients can be used to solve the wire drawing tasks and under conditions of a high hearth of plastic deformation as well.
On Reliability of Stainless Maraging Steel
Authors: Makhneva T.M. , Dement’yev V.B. , Makarov S.S.
Published: September 2017

The investigation results on the problem of the reliability of high-strength low-carbon maraging steel products have been generalized. The influence of a method for remelting on the reliability behavior is shown and the ways for the reliability behavior improvement are suggested. The study of the reasons for decreasing KCU during heat treatment shows that in addition to the precipitation of phases causing brittleness at cooling, chromium zones at heating, and formation of chemical and structure inhomogeneity in the two-phase region, the main reason is the remelting method with the parameters which predetermine the variation in grain size in the structure, a small number of interstitial elements (IE), retained austenite in the structure, and lower level of KCU of the steel prepared by VAR both after quenching and after TST.
Shows influence of the quenching temperature on the amount of retained austenite and level of impact strength (KCU), of the time of aging on the work of the crack development (KCV) at the temperature of maximal development of brittleness in steel 08Cr15Ni5Cu2Ti and on the position of brittleness transition temperature prepared by ESR and VAR.
After cooling down to the liquid nitrogen temperature, the VAR-steel is less liable to brittle fracture after maximal strengthening aging and more reliable after 1.5h-aging (KCV is twice as much as that in ESR-steel despite the low KCU level).
The science-based regimes are developed for stamped semi-finished items from steel 08Cr15Ni5Cu2Ti allowing guaranteeing the proper quality and reliability of functioning of the items made from them.
Current State and Future Prospects for Improvement of Mineral Melt Production Technologies
Authors: Matyukhin V.I. , Dudko V.A. , Grebneva N.V.
Published: September 2017

The article outlines the production of fibrous materials, discloses energy production targets for mineral wool items production, scrutinizes specific features of cupola process. Besides, the article presents the experimental research of mineral wool cupola process. Thus, the article describes the design of a cupola furnace, principles of its operation, and its main performance indicators.
A summary of analytical and theoretical research of non-isothermal gas flow motion in shaft furnaces is presented herein. The results of the experimental studies of the patterns of change in gas-dynamic operation of the cupola furnace are also shown in the article.
To assess the development of solid fuel combustion in the furnace, the laws that govern the changes in gas composition at the level of stockline have been studied. The results are shown in the Table.
The analysis of the current state of thermal and gas-dynamic operation of the mineral wool cupola furnace yielded recommendations for optimization and performance enhancement of the operating cupola furnace.
Diffusion Saturation by Titanium from Liquid-Metal Media as Way to Increase Carbide-Tipped Tool Life
Authors: Sokolov A.G. , Bobylyov E.E.
Published: September 2017

The analysis of the strengths and weaknesses of the existing technologies aimed at improving the performance properties of carbide-tipped tools is presented. The results of studies into the process of diffusion metallization by titanium of a carbide-tipped tool TK type from the media of fusible liquid-metal solutions is given. The influence of titanium diffusion coatings on the durability of carbide tools is investigated. A method of providing formation on hard alloys for wear-resistant titanium high-quality functional coatings is described. The thickness of the coating varies depending on the temperature and exposure time, and ranges from 4 to 6 μm. The hardness of the coatings obtained depends on the temperature of the coating and modes of pre-carburizing, and varies from 24100 to 30000 MPa. The microstructure of the coatings is investigated. The coating consists of two layers: the coating and the transition zone, the size and hardness of which depends on the conditions of pre-carburization and modes of application of the coating. The dependence of the coatings thickness on the duration of the plates exposure in the melt, the temperature of coating composition from the coated hard alloy is investigated.
New Unconventional Additives in Concrete Technology for Expansion its Functionality
Authors: Tukhareli V.D. , Cherednichenko T.F. , Pushkarskaya O.Y.
Published: September 2017

Functional enhancement of concrete, giving it heat-resistant properties becomes possible while adding mill ground additions based on silicon carbide materials of the region. The selection of silicon carbide waste and secondary production materials as a filler for the production of concrete with heat-resistant properties was based on the following principles: dispersion, the chemical composition, phase composition that reflect the chemical activity of the material in relation to the concrete binder. The thermal resistance of concrete has increased fivefold. In forming concrete structures with addition of silicon carbide occurs embedding into the structure of hydrates fine powder silicon carbide cyclone dust, with the chemical processes behaviour in the boundary contact zone between binder and filler. The increase of thermal resistance can attribute the resulting concrete composition to the category of heat-resistant concretes, and that significantly expands the functionality of concrete.
Quality Evaluation of Platinit Wire by Different Producers
Authors: Kasatkina E.G. , Mezin I.Y. , Limarev A.S. , Somova J.V.
Published: September 2017

The study presents a comparative analysis of consumer properties of platinit by different producers. Both the products of Russian companies and the foreign counterparts are considered. It was established that the domestic platinit, though not very different in composition from its foreign analogues, is still inferior to them in its parameters, such as physical and technological properties, as well as surface quality.
Study of Carbon Fiber Materials Sorption Capacity to Remove Heavy Metal Ions and Oil Products from Wastewater during its Treatment
Authors: Syutova A.I. , Alibekov S.Ya. , Syutov N.P.
Published: September 2017

The article highlights the results of a study of the sorption capacity of some types of carbon fiber materials (CFM) with respect to the ions of heavy metals and oil products. A sorption method for the wastewater treatment, which allows cleaning the wastewater from oil products, ions of heavy metals, and other pollutants to the MPC, was suggested, and some recommendations for the implementation of the method were given. It was found that the use of CFMs for the sorption of heavy metal ions and oil products was more effective than that of some other known sorbents. The regeneration possibility of CFM, simplicity, and variability provide for a number of advantages compared to other known methods. The suggested method can be implemented both as a standalone and in conjunction with other methods to improve the biological treatment of wastewater.
Study of Compression Soft Porous Foam Materials
Authors: Cherunova I. , Kornev N. , Paschen Mathias
Published: September 2017

The paper presents the findings of the research into neoprene-like soft foamed materials during compression in water. The specific features of the internal structure of such materials lead to complex deformations. This is related to the specific features of the internal structure of materials that contain a large amount of inert air. The paper also presents the findings of structural studies which explained the relationship between the elastic properties of materials and the strength of polymer bonds forming internal air cavities. When foamed the polymer sections are destroyed under compression, it results in the loss of enclosed volume of air voids. This changes the total volume and thickness of the material, which defines some physical and thermal properties of products made of such material. Hydrostatic pressure environments have their own specific features. Rheological properties of soft polymers in a hydrostatic pressure environment give rise to a composite effect of compression deformation. The study of recent developments in the research into polymer deformations in a hydrostatic pressure environment shows that it is difficult to record the stages of reversible and nonreversible compression deformation in near-real experimental simulation of diving operations. The paper presents the developments and findings of experimental design studies for a product (wetsuit) made of foamed materials that were conducted in a hydrostatic pressure environment in an enclosed volume using special Drucktank equipment by the Marine Engineering Department of the University of Rostock
Polymer-Bitumen Binder Based Multifunctional Material
Authors: Abramyan S.G. , Oganesyan O.V.
Published: September 2017

The relevance of this paper is based on the increasingly larger volumes of reconstruction of buildings and structures and also with the opportunity to use polymer-bitumen binder based multifunctional materials for construction and installation purposes during such works as sealing cracks and hollows in structural elements. The paper provides a summary analysis of the current situation with the use of composite materials to increase the load-bearing capacity of certain structural elements. It discusses the methods for achieving multi-functionality of materials with the use of polymer-bitumen binders. It further details the procedure for the experimental studies conducted to test several composite materials introduced in a liquid polymer-bitumen mass and applied onto an adhesive polymer-bitumen tape, including the following components: graphite powder, graphite grease, cement and a mixture of graphite powder and cement. When assessing the adhesion characteristics of the samples tested, it was found that the best performance was demonstrated by the following composite materials: polymer-bitumen tape with graphite powder and a mixture of graphite powder and cement. Their adhesion characteristics were shown to be relatively equivalent by using the following two testing methods: the tear-off method with a three day holding period, and the instant adhesion measuring method. However, composite materials with a liquid polymer-bitumen basis failed to produce the desirable results. The authors are of the view that in this case the given adhesion power parameters can be achieved through changing the structure of the materials.
Colloid-Chemical Bases on Creation of Multifunctional Modifiers of Concrete Mix and Concrete
Authors: Kosukhin M.M. , Shapovalov N.A. , Kosukhin A.M.
Published: September 2017

The colloid and chemical bases on creation of highly effective multifunctional modifiers were developed on the basis of the experimental data in the field of chemical modifying of concrete compounds and concrete. The article shows that the leading role in concrete chemicalixation now belongs to the components of the given class, because application of these components supplies the concrete compound and the concrete with a complex of specified properties for operation in different conditions. The article notes that this tendency is true while monolithic concreting, as it is most widely applied when carrying out maintenance operations and it places higher quality requirements upon the concrete compounds and the concrete. The study syntesizes a highly efficient multifunctional modifier for monolithic concretes. This modifier posesses a fungicidal effect and contains a plasticizing component, an accelerator of cement hydration processes, concrete hardening. The article also studies the colloid and chemical properties of the obtained modifier and the properties of the concrete compounds and the concrete with its application.
Creating Carbon Nanotubes Microenvironment in Surfactant Water Solutions
Authors: Zueva O.S. , Makarova A.O. , Faizullin D.A.
Published: September 2017

The infrared absorption spectra of aqueous dispersions of carbon nanotubes in the presence of surfactants and alkali metal salts in the frequency range from 1000 cm-1 to 3000 cm-1 have been studied. The possibility of controlling the characteristics of local environment of carbon nanotubes by varying external electrolyte and modulation the surfactant micelle structure has been shown.
Examining the Microstructure of Industrial Leaded Brass Blanks for Quality Control
Authors: Tkachuk G.A. , Shimov V.V. , Chikova O.A.
Published: September 2017

The microstructure of industrial leaded brass blanks made of leaded brass was examined for quality control. The exogenous inclusions and pores in the microstructure of the blanks were found. The microstructure was examined by means of traditional metallographic analysis methods. Is showed the transition from exogenous inclusions and pores, which were not removed in the initial processing stage, to the crack, which leads to billet destruction on one of the last processing stages. An algorithm for calculating the additional pressure that occurs when the mechanical action on the metal having a exogenous inclusions is suggested. Therefore, without the quality control leaded brass blanks a metallographic method, it is impossible to guarantee the reliable operation of machines and responsible purpose constructions.
Nano Additives Influence on Fuel Oil Properties
Authors: Zvereva E.R. , Khabibullina R.V. , Zueva O.S.
Published: September 2017

The experimental investigations of the dynamic viscosity of the M100 brand heavy fuel oil with addition of nanostructured additives at temperatures of 65 °C and 75 °C have been presented. The study of the dynamic viscosity conducted for M100 fuel oil sample with the addition of a suspension of carbon nanotubes dispersed in diproksamin (concentration of 0.0125 wt.% CNT + 0.5 wt.% diproksamin) showed its decrease in almost the entire range of shear rates. The reduction in viscosity was observed even at low shear rates, which indicates the absence of extensive spatial structure in the oil heterogeneous system. Thus, the additive based on carbon nanotubes dispersed in diproksamin, improves the rheological properties of oil, reducing its viscosity to 12-15%. Therefore the energy consumption for fuel oil heating and pumping through pipelines can be reduced.
Research of Efficient Methods of Superplasticizer Introduction into Cement Materials
Authors: Korovkin M.O. , Grintsov D.M.
Published: September 2017

The article presents the results of researching efficiency of different modes of superplasticizer introduction in solution mixture with different consistency - from hard to plastic. The following methods of superplasticizer introduction into cement were researched: co-grinding of superplasticizer with cement, mixing cement with superplasticizer in dry state, introduction of superplasticizer into cement with mixing water, evaluation of water reduction effect of an additive depending on the methods of its introduction into cement and the time of determining its consistency. It is established that the most efficient method of superplasticizer introduction into plastic mixture is its co-grinding with cement.
Environmental and Technical Possibilities of Marble Waste Recycling in Bricks and Sorbents Production
Authors: Oreshkin Dmitry V. , Perfilov V.A.
Published: September 2017

The article considers the environmental, technological, and economic problems of recycling at application fine marble waste in the production of facing ceramic bricks by the volumetric coloring method. The environmental and economic feasibility of using fine marble waste is proved. Also the problem of obtaining ceramic sorbents is raised.
Chemical Aspects of the Obtaining of Iron-Containing Coagulant-Flocculant from Electric Steel Melting Slag for Wastewater Treatment
Authors: Vasilenko T.A. , Koltun A.A.
Published: September 2017

The possibility of producing iron and silicon-coagulant-flocculant for purification of waste water was shown. The electric steel melting slag JSC "OMK-Steel" has been used as the starting material, in which the content of iron oxide to 25.8% and silicon dioxide is 17.6%. The optimal parameters of slag hydrochloric opening were as follows: the modification time at T = 40 °C – 1 hour, the concentration of hydrochloric acid – 1.5 N, the ratio of the solid and liquid phases of S : L = 1 : 10. In these settings the concentration of hydrosilicic acid (for silicon) will be 1532 mg/l; the concentration of iron – 1250 mg/l has a lower concentration of silicic acid in the production of the solution with increasing temperature and time of exposure. This paper examined the chemical aspects of the process of obtaining the new iron-containing coagulant-flocculant based on electric furnace slag. The results can be used to produce coagulants and flocculants using industrial waste.
Research on Influence of Technology of Bimetal Fluid-Film Bearing Manufacturing on Microstructure and Microhardness of Antifriction Coating and Steel Base
Authors: Rodichev A.Yu. , Sytin A.V. , Tyurin V.O.
Published: September 2017

The paper features the results of metallographic studies and measurements of microhardness of the antofriction coating and surface layer of a bimetal fluid-film bearing base. The character of influence and the peculiarities of the process of adhesion of antifriction coating and the basic material of the part were identified. The analysis of structural changes occurring during the distribution of temperature in the surface layer of the part was implemented.
Study the Effect of Heavy Elements Nanoparticles in the Photons Energy Spectrum in a Tissue-Equivalent Medium
Authors: Temchenko V.V. , Kustov V.N. , Lukуanenko Ksenya Sergeevna
Published: September 2017

The effect of the tantalum, platinum and gold nanoparticles on the energy distribution of the high-energy photons in the tissue-equivalent media is studied. It was shown that the presence of nanoparticles results in emergence in the medium of the electron-positron pairs manifesting in the decrease in the number of the primary photons and emergence of the secondary photons with energies of 511 keV and lower.
Theoretical and Experimental Investigation of Vibration Damping Sheet Dynamic Behavior
Authors: Cherkasov V.D. , Yurkin Yuriy V. , Avdonin V.V.
Published: September 2017

A great deal of attention is presently being drawn to the question of noise and vibration damping. One of the basic means of the effective damping of unfavorable noises and vibrations is the usage of special sheets with high vibration and noise damping properties in thin-slab structures. In this article the results of a study of the dynamic behavior (of the loss factor) of multilayer vibration damping sheets are being described. The aim of this article is to show the design optimization of multilayer vibration damping sheets, carrying a high loss factor. The theoretical prerequisites for the structure optimization of vibration damping sheets, having a high loss factor, have been determined. The experimental studies on the influence of the thickness of the vibration damping layer, thickness and Young’s modulus of experimental with theoretical data have also been carried out. More effective designs of multilayer vibration damping sheets have been scientifically substantiated.
Combined Extender Pigments Based on Industrial Wastes
Authors: Sapronova Zh.A. , Sapronov D.V. , Starostina Yu.L.
Published: September 2017

A pigment-filler for paints is developed based on iron ore enrichment wastes i.e. tailings ferruginous quartziteenrichment (TFQ) and for dust sleeve filters while ceramsite production. The samples of powder materials having a particle size less than 50 microns were used for the experiments. The samples were prepared according to a formulation of paints and varnishes "Plant Paints Quil" (Belgorod). The samples of the primer were tested on the following parameters: dispersibility, the degree of grinding, relative viscosity, hardness, drying time, adhesion and elasticity. The results showed that the proposed pigment-filler is of the same quality as the materials traditionally used for the production of primers. Thus the proof of the possibility and prospects of using TFQ and ceramsite dust as pigments-fillers in the manufacture of paints and varnishes is evident.
Multi-Layer Wood-Polymer Composite
Authors: Tuncev D.V. , Sattarova Z.G. , Galiev I.M.
Published: September 2017

The article describes a new multilayer wood-polymer composite material, the outer layer of which comprises wood flour, polypropylene, polybutadiene, concentrated dye. The inner layer comprises longwise oriented wood particles of the fibrous type of 2-10 mm and the recycled thermoplastic polymer. An experimental complex used to identify structural and operational characteristics of the composite material was presented. The experimental study of the mechanical properties of the product hardness, abrasion, cross-breaking strength were conducted. The results of the tests selected and validated the composite structure.
Investigation of Ba-Fe-O System near the BaFe12O19
Authors: Vinnik D.A. , Trofimov Evgeny A. , Zherebtsov D.A.
Published: September 2017

This article presents an investigation on phase equilibria of barium hexaferrite and neighboring phases near its melting point and on the characteristics of the compounds in the vicinity of BaFe12O19 phase. Fe3O4, BaFe22+Fe163+O27 (W type), BaFe2+Fe143+O23 (X type), BaFe12O19 (M type), Ba2Fe22+Fe123+O22 (Y type), Ba3Fe22+Fe243+O41 (Z type) and BaFe2O4 (S type) were detected in the molten and solidified stoichiometric BaFe12O19. Literature data are summarized and compared with results of the present work.
The Use of Ferrovanadium Production Sludge Wastes in Claydite Gravel Technology
Authors: Starostina I.V. , Simonov M.M. , Denisova L.V.
Published: September 2017

The paper affirms that, despite the number of works in the sludge neutralization of waste water containing heavy metal compounds, the proportion of their use remains marginal. Therefore, one of the important directions of nature protection activities and the natural resources rational use is developing a technology for processing these wastes and their involvement in the production of useful products. The research of chemical, mineralogical and granulometric composition of wastewater slurry waste neutralization in production of vanadium pentoxide and ferrovanadium alloys by OJSC "EVRAZ Vanadium Tula" has been carried out. It is proposed to use a slurry waste in the claydite gravel production technology. The introduction of 1% sludge makes it is possible to obtain the following characteristics of claydite gravel: strength brand P 25, a packed density mark - 250. The 3% increase of the sludge provides a claydite gravel with the strength brand P 15 with the packed density of 250 kg/m3.
Formation Structure and Properties of Parts from Titanium Alloys Produced by Direct Laser Deposition
Authors: Sklyar M.O. , Klimova-Korsmik Olga G. , Cheverikin V.V.
Published: September 2017

In this article, perspective using of the laser deposition method for manufacture details from the titanium alloy VT20 is considered. Dependence on a structure of the fractional composition is shown. Study of the structure and properties of parts, which were produced by DLD technology using different modes and under different conditions.
Atomic Structure Design of Rapidly Quenched Amorphous Cobalt-Based Alloys
Authors: Pustovalov Evgeny Vladislavovich , Modin Evgeny B. , Fedorets Aleksandr N.
Published: September 2017

The research presents the atomic structure investigation of amorphous rapidly quenched Co58Ni10Fe5Si11B16 at.% alloys. The alloys were quenched with linear velocity of cooper wheel surface from 22 to 38 m/s. We found a nonlinear dependence of local atomic ordering from linear velocity of cooling wheel. The average lateral density of ordered atomic clusters of 5 nm size changes from 4% to 8%. The amorphous alloy with metastable disordered structure with lower level of free energy is more stable against the external conditions. This approach can be used to determine the best technological parameters for preparing amorphous metallic alloy with metastable structure.
Effect of Thermal and Thermal Magnetic Treatment on Damping Properties of Fe-Cr-Al Alloys
Authors: Melchakov M.A. , Scvortsov A.I. , Scvortsov A.A.
Published: September 2017

The authors studied the effect of the pre–heat treatment and subsequent thermomagnetic treatment on the damping and magnetic properties of the Fe–Cr–Al alloy system. This article reveals the dependences of influence of chromium and aluminum on the thermomagnetic treatment effect. As a result, the study identified the optimal modes of treatment of the alloys to maximize the damping capacity.
Influence of Heating Temperature and Cooling Conditions on Structure and Properties of Two-Phase Titanium Alloy
Authors: Vodolazskiy F.V. , Zhloba A.V. , Popov Artemiy A.
Published: September 2017

The effects of heating temperature in the range 790-990 ° C and subsequent cooling in the water, in air, with the furnace on the formation of the structure, phase composition of the titanium alloy VST2 were studied. There was the metastable β-solid solution and α - phase during the quenching heating temperature to 865 °C. The phase composition in the temperature range of 865-915 °C was α + β + α''. There was only α'' - martensite in the structure at the temperatures above 940 °C. Reducing the rate of cooling (air, furnace) helped the retention of two-phase α + β - state after all the heating temperatures. The temperature - rate parameters of heat treatment which can obtain good strength and ductility properties are suggested.
Influence of Oxygen Concentration on Plasma Dynamic Synthesis Product in Fe-O System
Authors: Shanenkov Ivan , Sivkov A. , Ivashutenko A.
Published: September 2017

In spite of being known for centuries, iron oxides are still important. Such modifications as magnetite Fe3O4 and epsilon phase ε-Fe2O3 are of great scientific and practical interest due to their promising electromagnetic properties. Nonetheless, only few methods allow synthesizing both of these phases, but they have some well-known disadvantages, which limit the possibility of using them widely. This work shows a unique method of synthesizing these materials in one short-duration plasma dynamic process using a coaxial magnetoplasma accelerator with iron electrode system. The plasma chemical reaction occurs between the iron-containing plasma and gaseous precursor (oxygen). The influence of oxygen pressure on the products of plasma dynamic synthesis was also studied in the framework of this investigation. It was found that the higher oxygen concentration leads to the formation of product with predominant content of epsilon iron oxide ε-Fe2O3, as well as lower oxygen concentration results in obtaining the product with the dominance of magnetite phase.
Investigation of Phase Composition of Samples Sintered from Tungsten-Containing Composite Micro- and Nano-Powders
Authors: Ageev E.V. , Altukhov A.Y. , Khardikov S.V. , Kirichek A.V.
Published: September 2017

The article presents the results of research into the phase composition of samples sintered from tungsten-containing composite micro- and nano-powders obtained by mixing VK8 (70%) and PRS (30%) powderz obtained in kerosene lighting. It is established that the main phases of the sintered sample are the WC and Fe3С.
Overall Hardening of Solid-Rolled Wagon Wheels by Volume Quenching and Surface Plasma Processing
Authors: Kanayev A. , Bogomolov A.V. , Sarsembayeva T.
Published: September 2017

In relation to solid-rolled wagon wheels the advantages of differentiated quenching of all wheel elements are shown in comparison with quenching of only wheel rim rolling surface. It should be noted that larger possibilities to enhance performance characteristics of heavy duty details and products can be fulfilled using the technology of overall hardening including the differentiated quenching and surface plasma processing. It is established that along with the improvement of mechanical properties plasma processing after volume quenching allows for a considerable increase of crack resistance of surveyed grades in comparison with volume quenching without plasma processing. The martensite structure of the strengthened layer during such overall processing in comparison with the martensite structure of volume and strengthened base is characterized by high level of particle size that is specified by reduction of the original austenite grain due to very high heating and cooling speeds as well as small time of steel stay at high temperatures. In order to increase hardness and resistance against cracks generation plasma processing and preliminary volume quenching are recommended. A composite working layer with high wear and crack growth resistance and relatively soft and plastic core are developed in details and products volume quenched when surface plasma strengthening.
Phase Transformations in Novel Medium Carbon High Hardenability Steels
Authors: Maisuradze Mikhail V. , Ryzhkov Maksim , Surnaeva O.
Published: September 2017

Novel steels with high hardenability were proposed to replace the conventional HY-TUF steels for the large parts manufacturing. The chemical composition of the steels under consideration was, mass. %: C – 0.16...0.18; Cr – 2.35...2.55; Mn – 0.67...1.99; Si – 0.76...1.03; Ni – 1.17...2.31; Mo – 0.34...0.47; S. P < 0.025. The dilatometer experiments revealed that during the continuous cooling of the steels with the constant rates 0.1... 30 °C/s only martensite and bainite transformations occurred. for conventional HY-TUF steel ferrite and pearlite formed after cooling with the rates 0.1...0.3 °C/s.
Use of the Superplasticity Phenomenon of Steel for "Internal" Magnetic Correcting a Product
Authors: Pustovoit Viktor N. , Dolgachev Yuri , Dombrovskii Yu.M.
Published: September 2017

The results of the course of martensite transformation in steel under the action of the magnetic field are presented. These results indicate that the formation of stress-assisted martensite in the temperature interval Md-Ms (where superplasticity was observed) is possible. It was found that during hardening of steel products in magnetic field, martensite can be formed not only below Ms, but higher than this point (in the temperature range). The significant structural transformations and steel properties improvement under thermal treatment in a magnetic field depend on the catalytic effect of a field on the transformation development. This effect occurs when the initial phase is paramagnetic, and the product of the transformation is ferromagnetic. Stress-assisted martensite and cooling-induced martensite are formed in the superplastic temperature range of the austenite. This makes it possible for the undeformation hardening of steel products in a magnetic field. The undeformation hardening is caused by a magnetic field holding the product and the formation of martensitic structure oriented predominantly towards the magnetic field vector.
Evaluation of Influence of Thermal Methods of Metal Separation Cutting on Welding Quality
Authors: Tingaev A.K. , Ivanov M.A. , Ulanov A.M.
Published: September 2017

We have investigated a possibility of obtaining high-quality welded joints after oxygen and plasma cutting of steel С355 without removing the heat-affected zone (HAZ), in which the changes in chemical, phase and structural compositions are observed. Numerical and experimental studies of the effect of heat input of MAG and Submerged Arc welding on the quality of welded joints are performed. In particular, it was found that when the heat input of welding is at least 6.5 kJ/cm, the metal of HAZ of the edges after cutting is heated during the welding to temperatures above Ас3, which leads to its full recrystallization. When the heat input of welding is at least 10 kJ/cm, the edges after cutting are completely melted and become a part of the welding seam metal. The presence of extensive areas of melting and recrystallization of the edges in the welding process contributes to obtaining high-quality welded joints without removing the HAZ of the edges after cutting. To verify the results of numerical studies, experimental tests of control welded joints were conducted, which showed that the values of bending angle and impact toughness of the welding seam metal and heat affected zone are significantly above the regulatory requirements to quality of welded joints, and not less than the same requirements for steel С355. The obtained results confirm the possibility of revising domestic regulatory requirements for the steel constructions production in terms of the preparation of edges for welding using technologies of thermal cutting without subsequent machining.
Application of the Complete Material Balance Method to Estimate the Composition of Weld Metal in Manual Arc Welding
Authors: Votinova E.B. , Shalimov M.P.
Published: September 2017

The article addresses the mathematical model of manual arc welding with coated electrodes, based on complete material balance, the model is a three equation system. The first equation describes the interaction between average and partial transition coefficients; the second equation shows the transition of an element from the metal phase; the third one characterizes the reduction of an element from the slag phase. The results of modeling for base and rutile electrode are given. The convergence of experimental data and calculations is shown. The regressionequations to calculate the parameters required for forecasting the composition of overlaying metal and weld metal in manual arc welding are listed.
Cu-Ni-Zn 15-20 Alloy - Particular Qualities of Alloying and Crystallization Parameters
Authors: Baraz Vladislav R. , Gerasimov S.S. , Gruzdeva I.A.
Published: September 2017

The article is devoted to the study of Cu-Ni-Zn ternary alloy properties. German silver is applied in the instrument making industry, shipbuilding industry, and medical tool production. Furthermore, German silver is extensively used for domestic goods and costume jewelry. It is known that the aluminum and tin additions improve the Cu-Ni-Zn alloy flowing and casting mold fillability. It is a matter for the figurine and thin section casting production. That is why, using the experiment planning method we have studied the effect of Al and Sn alloyage and crystallization temperature on structure, casting characteristics and the casting characteristics of German silver. The study was realized by casting samples which were produced with lost wax method. Aluminum microadditives (0.4 %) have a positive impact on the casting mold fillability and improve markedly surface quality of casting samples. Tin leading into melt (about 4 %) ensure the marked growth of yield strength (by 65...70 %), while the elongation is maintained. The role of the mold temperature has a lesser impact on the yield strength. The mold temperature reduction from 550 °C to 450 °C leads to the grain size decrease and the little yield strength increase. Moreover, the surface condition measurement shows that aluminum and tin additions greatly reduce the castings surface roughness.
Bolts Manufacturing Technology
Authors: Reshetnikova E.S. , Usatiy D.U. , Usataya T.V.
Published: September 2017

The urgency of a new process development of cold forming of high-strength flange bolts has been shown in the article. It also points out some shortcomings of existing technologies. To improve the quality of bolts a new instrument design was developed. The research of the working tool identification impact on its resistance and stress-strain state of the workpiece was carry out. The software package DEFORM, designed for process simulation of metal forming is used in the article. The mathematical and computer modeling technology bolt stamping with flange was applied to carry out the study. Based on the conducted theoretical and experimental studies a new technology for manufacturing the flange bolts is patented.
Heat Treatment of Carbon, High-Chromium Steels for Mud Pump Liners of Drill Rigs and Drilling Equipment
Authors: Nikiforova S.M. , Filippov M.A. , Zhilin A.S.
Published: September 2017

The application of hardening heat treatment process at high temperatures (1100-1170 °C) for high-chromium steels of martensitic-carbide class 95Kh18 and Kh12MFL has been studied. Metallic substrate consisted of high-carbon martensite and residual metastable austenite with some traces of carbide has been obtained. Experiments have shown the resulting structure gains high frictional hardening capacity upon the application of heat. Sufficient amount of cooling martensite can be traced in the analyzed steel after high-temperature quenching (cooling up to the temperature of-70°С). Being combined with residual metastable austenite, it provides the increase of abrasive wear resistance by 25% compared with high temperature annealing. The influence of tempering temperature on hardness and abrasive wear resistance of analyzed steels 95Kh18 and Kh12MFL has also been determined.