bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of production technology on the structure and properties of powder high-speed steels
Authors: Korotkov A N , Korotkova L P , Laschinina S V 
Published: December 2020

Abstract
Powder high-speed steels are a new group of tool materials with enhanced operational capabilities compared to steels made using traditional technology. The paper presents an assessment of the impact of powder steel production technology on their structure and properties. The studies are carried out on the example of two grades of experimental powder steels - R7M5F2-MP and M5F5-MP in three directions: the influence of compacting technology on the structure and properties of powder steels; development of optimum modes of hardening heat treatment; improving the quality control methodology of powder high-speed steels at the main stages of their production technology. A comparative analysis on the quality of the experimental powder high-speed steels depending on the chemical composition and various schemes for compacting workpieces from atomized powder is carried out. As a result of studies, the influence of hardening heat treatment modes on the phase composition, structure and basic properties of powder high-speed steels is established. Recommendations on hardening thermal working regimes to ensure the optimum ratio between hardness and heat resistance of steels are developed. Studies have shown feasibility of using powder high-speed steels (including domestic ones).
Optimization of granulometric composition of mineral part of fine-grained concrete modified by ultrasound
Authors: Belov V V , Kuliaev P V , Artemiev A A 
Published: December 2020

Abstract
Ultrasonic methods are widely used in the construction industry as methods of defectoscopy and non-destructive testing of physical and mechanical characteristics of concrete in structures. At the same time, ultrasonic treatment of concrete mix and freshly laid concrete can be used for the purpose of modifying its structure and properties as well. The relevance of the topic is directly related to the consideration of issues related to savings in construction, since it allows you to reduce the cost of introducing expensive cements into the concrete.
The role of nanostructure forming mechanism in the production of universal functional coatings with Fe-Ni, Co-Mn, Ni-Cr alloys
Authors: Zhikhareva I G , Schmidt V V , Denisenko D V 
Published: December 2020

Abstract
Galvanic nanostructured coatings with Fe-Ni, Co-Mn, Ni-Cr alloys with enhanced operational properties are obtained. Three mechanisms of ultrafine particles formation are considered: usage of the high-voltage alternating current (HVAC) method (Fe-Ni, Co-Mn), presence of a new hexagonal phase ε-Fe, which has dimensional effects. 2) introduction of a special carbamide additive, N-acid (Ni-Cr). 3) due to multilayer films Cr(OH)3·(H2O)·2H2O in the absence of an inhibitor (Ni-Cr alloy), the relationship between the nanostructure forming mechanism and the spectrum of functional properties is shown.
Ceramics on the basis of zinc orthostannate
Authors: Aksyutin I I , Rasskazin AV 
Published: December 2020

Abstract
This article presents the results of a study of the process of synthesis of zinc orthostannate powder by the traditional chemical method of mixing the initial zinc and tin oxides in a stoichiometric ratio of 2:1. The phase composition of this mixture after calcination at temperatures of 850-1250°C was studied by x-ray diffraction. The microstructure of the powder was studied by scanning electron microscopy. The optimal temperature for the synthesis of zinc orthostannate is 1250°C. The synthesized porous ceramics on the basis of zinc orthostannate (Pо = 38,6 %, ρ = 3,84 g/cm3)
Study of the morphology and elemental composition of electroerosive materials, obtained from waste based on W-Ni-Fe alloy in lighting kerosene
Authors: Ageev E V , Pereverzev A S , Selyutin V L 
Published: December 2020

Abstract
This article presents a study of the morphology and elemental composition of electroerosive materials based on W-Ni-Fe alloy, obtained in lighting kerosene. It has been shown that part of carbon is present in the resulting electro-erosion materials. The main elements in the resulting EED materials are W, Ni and C.
The study of high-temperature stability of the heat-resisting intermetallide coating
Authors: Tsareva I N , Berdnik O B , Krivina L A , Maksimov M V 
Published: December 2020

Abstract
The article presents the results of a study of the processes occurring in a heat-resistant intermetallic coating under ultrafast thermal heating by a laser beam. Workers, guide vanes and other parts of the hot tract of gas turbine engines are operated at elevated temperatures, pressures and speeds. Significantly increase the life of such parts by applying heat-resistant coatings that protect the surface from high-temperature oxidation, erosion, and softening of the base material. The plasma coating consists of an intermetallic (β-phase) compound. A pulsed-periodic laser with pulse energy E = 5, 10, 15, and 30 J was used for thermal heating. Upon heating, surface melting of the fusible phases occurred and the integrity of the surface layer of the coating was violated. By changing the parameters of laser radiation, it is possible to carry out express diagnostics and comparative tests of coatings, as well as to predict their behavior in extreme conditions.
The influence of surface preparation methods on the adhesion of film antifriction coatings
Authors: Rodichev A Yu , Gorin A V , Kolpakova S V , Tokmakova M A 
Published: December 2020

Abstract
The article presents the equipment, methods and results of studies of the adhesion strength of a film anti-friction coating with a steel base. A multivariate experiment was performed. The factors and the significance level of each of them, affecting the strength of the antifriction film coating, are revealed. The dependence of the adhesion strength on the modes of applying the film coating is established and described. Recommendations have been developed on the choice and method of applying film anti-friction coatings for maintenance and repair of motor vehicles.
Agricultural materials based on eco-friendly polymers
Authors: Shibryaeva L S , Podzorova M V , Tertyshnaya Yu V , Chaplygin M E 
Published: December 2020

Abstract
The present article is concerned with materials based on polyhydroxybutyrate and polylactide as new materials for seed carriers, producing a stimulating effect on their germinating ability as well as the growth and development of plants. It has been established that the growth of wheat is fundamentally affected by the structure of these materials. The composition and chemistry of polymers determine a mechanism of its biodegradation in a biological environment. At the same time, the structure of polymers and polymer of composites determines the speed and affects the kinetics of processes. Thus, the use of the biodegradable polymers has a positive impact on both the growth of plants and the environment.
The choice of pulse laser radiation modes for hardening a metal cutting saw
Authors: Sergeev D G , Marinin E A , Marinina N I , Durseneva M D 
Published: December 2020

Abstract
Increasing production rates of parts, toughening of operation modes and load increasing, reduce the service life of equipment. The destruction of the tool usually begins with the surface, so its strengthening is one of the main factors of improving the resource and reliability. Hardening the working surfaces with laser radiation is the most effective and promising method of hardening tools that are used under friction conditions. This article presents the results of experimental study of the laser hardening process of a band saw made of 9CrV tool steel; a mathematical model based on these experiments was made to show the connection of the parameters of pulse laser radiation and the depth of the resulting hardened area. It shows that the pulse energy and the movement speed for pulse laser hardening with the chosen parameters have a decisive influence on the depth of the hardened area.
Theoretical methods for calculating the structure and properties of cast iron based on Fe-C-Al systems
Authors: Bikulov R A 
Published: December 2020

Abstract
The main factor preventing the widespread introduction of Fe-C-Al system cast iron is the mismatch of the cast iron structure with the operating conditions. At the same time, there is no sufficiently simple and reliable technique in the literature for calculating the structure of iron of the Fe-C-Al system, taking into account both kinetic and thermodynamic factors and operating conditions. Theoretical methods of determination of structure and properties of cast iron of Fe-C-Al system are proposed on the basis of thermodynamic, kinetic analyses, as well as metallographic and X-ray phase investigations in relation to operating conditions.
Improving the heat insulation efficiency of the blast furnace tuyere
Authors: Tarasov Yu S , Kobelev O A , Sayfullayev S D 
Published: December 2020

Abstract
A proposed method to increase the service life of the heat-insulating insert in the air passage of the blast furnace tuyere suggested gluing heat-resistant siliceous fabric onto its outer surface, and to reduce heat loss and increase the tuyere resistance to burnout, fixing a ceramic disk to the end of the tuyere’s nose. The necessity of measures to increase the service life of a heat-insulating insert in the tuyere was justified by simulating its stress state in Ansys. The use of heat-resistant siliceous fabric on the entire outer surface of the insert allowed a more than twofold increase in the insert’s service life compared to the option when the fabric was glued to the insert part from the flange to the gas pipe. Using simulation of the tuyere’s thermal state in a DEFORM–2D environment and industrial experiments, the possibility of reducing heat loss and protecting the tuyere from burnout by thermal insulation of the end of its nose using a ceramic disk is shown.
Influence of the composition and synthesis technology on the structure of syntactic carbon foams
Authors: Galimov E R , Fedyaev V L , Shibaev P B , Samoylov V M 
Published: December 2020

Abstract
The paper shows the influence of the composition and synthesis technology on the structure of syntactic carbon foams. It studies the foam technologies using carbon microballoons and phenol formaldehyde resin, and pitch carbonization under pressure. It reveals the influence of added mesophase microballoons in the starting pitch on the formation of a porous structure of syntactic carbon foams. It shows the macropore size distribution in carbon foams made by industrial carbonization under pressure.
Method for production carbon plastics with multifunctional properties
Authors: Nelyub V 
Published: December 2020

Abstract
The technology of metal coating of carbon tapes and fabrics, consisting of two technological operations: activation and deposition, is considered. To perform the process of activating the surface of carbon tapes and fabrics, UPM-500 plasma activation device at a low-temperature and plasma air were used. A laboratory magnetron sputter MIR-2 was used for applying metal coatings by magnetron sputtering. The diagram of the formation of metal coatings on plain carbon fiber, taking into account its structure, is given. The study provides the results of determining the carbon plastics interlayer shear strength manufactured using vacuum infusion method, which vary in the structure of the reinforcing filler, the metal coating type and the composition of the epoxy binder. It is shown that the composition of the binder, the reinforcing material and the type of coating equally play a significant role in the shear strength of carbon plastics.
Foam Glass Based on Russian Far East Raw Materials and its Use in Mechanical Engineering
Authors: Yatsenko E A , Smoliy V A , Goltsman B M , Golovko D A 
Published: December 2020

Abstract
The necessity of developing a technology for the synthesis of foam glass based on Russian Far East local raw materials is substantiated for its use as thermal insulation of oil pipelines. A powder technology using the hydrate method was developed for the production of foam glass based on diatomite from the Chernoyarskoe deposit. The results of experimental studies of the synthesized foam glass properties were presented. The effectiveness of its use as thermal insulation of oil pipelines in harsh climatic conditions of the Russian Far East was proved.
Synthesis of Control Systems for Complex Technical Objects
Authors: Abidova E A , Dembitsky A E , Lapkis A A , Chernov A V 
Published: December 2020

Abstract
The paper considers the task of improving the reliability of standby diesel generator sets of nuclear power plants (NPP) of the Russian Federation. A solution to the problem using a portable software and hardware diagnostic complex (I&C complex) that provides registration, processing, analysis and storage of data is proposed. The article describes in detail the main provisions of the methodology to monitor the state of the object. A method of analyzing the state of a diesel generator unit (DGU) based on representing an array of vibration and ultrasound parameters in the space of the principal components is used. The results of I&C complex tests for the diagnostics of NPP DGU are presented. An assessment of the resource of equipment based on the results of diagnostics for risk management, improving equipment reliability and cost savings is proposed. Haчните свою аннотацию здесь…
CAD-technologies in archaeological reconstructions: scientific and educational experience of Vyatka State University
Authors: Trushkova I Yu , Grachev S P , Flaksman A L , Prigarin A A 
Published: December 2020

Abstract
Russian regional scientific schools demonstrate examples of applied research at the frontier of sciences, including a combination of accurate / engineering and archaeological research. Vyatka State University has gained some experience in such cooperation. Sources for this work are the archaeological collections of the village. Lalsk, research methods and techniques - archaeological techniques and digital technology. Using digital processing of collections and other archaeological excavations as an example in the northern Vyatka borderlands, computer applications for theoretical analysis of archaeological artifacts and the application of its results are shown. The article presents the algorithms for using digital software. Certain technologies make it possible to reconstruct old household items from fragments, form collections of 3D models, and copy objects with a complex relief or artistic value to preserve the originals. It is indicative of compiling a relief and multidimensional copy of the excavation site, a databank of archaeological objects and some related information. The features of building a virtual archaeological museum and its use by different target groups of the region are outlined - by age and social affiliation. The traditional spheres of using the obtained results — science and education — have been significantly expanded at the expense of cultural, tourism, cadastral and urban planning institutions, and law enforcement agencies. The directions of development of museum and engineering pedagogy are outlined. Digital technologies in archeology allow them to be applied remotely, remotely to small and medium-sized businesses, and to increase the quality of life in the region.
A mathematical model for the selection of visualization system components in training complexes
Authors: Dedov Denis , Arkhipov Alexey , Sidorchuk Alexander 
Published: December 2020

Abstract
The task of choosing the components of the visualization system for training complexes is currently being solved on the basis of expert analysis of existing equipment and technical requirements. The expert approach does not allow to automate the process of selecting components. Therefore, the urgent task is to develop a method that allows for automated decision support for the selection of visualization system components. To solve it, a mathematical model based on the use of the apparatus of the theory of sets and graphs was developed in the framework of this study. The mathematical model includes the calculation of a set of criteria to evaluate the components of the visualization system, to increase the objectivity of their choice.
Reliability analysis of technological cell with start-up device
Authors: Glech Sergey G , Obzherin Yuriy E , Fedorenko Sergey N 
Published: December 2020

Abstract
An important factor affecting the efficiency and reliability of technological systems is the reliability of their start-up device. In the work, a semi-Markov model of the functioning of the technological cell is built taking into account the start-up device. The analysis of the influence of the reliability of the start-up device on the reliability of the technological cell.
Information model of production and logistics systems of machine-building enterprises as the basis for the development and maintenance of their digital twins
Authors: Grigoriev S N , Dolgov V A , Nikishechkin P A , Dolgov N V 
Published: December 2020

Abstract
The aims and tasks of the creating of digital twins of objects and processes have been considered. The aims and tasks of the development of the digital twin of the production and logistic system of the machine-building enterprise have been formulated. The structural model of the production and logistics system of digital twin has been offered and the data structure of the information model of the production and logistic system has been developed.
Active cooling systems for the hot zone of heat engines
Authors: Smolentsev Vladislav , Gritsuk Vasiliy , Mandrykin Andrei 
Published: December 2020

Abstract
Various types of hot zone cooling systems for liquid rocket engines are considered. The analysis of systems for external and internal cooling of the hot zone of the combustion chamber and the jet co-PLA is performed. The area of primary use of external and internal impact of components on the combustion chamber and the jet nozzle of a temporary product with a high thermal load on the material is given. Recommendations on the choice of technological methods for processing heat-protective coatings were developed, where the advantages of combined electroabrasive treatment were revealed. In this case, the possibility of finishing the transition sections of the path from areas that are difficult to access for the tool, which have coatings with ceramic granules that have been used in the latest products of aerospace technology, is shown. The mechanism of heat transfer by the cooling medium from the areas of the greatest heating, as a rule, to the flow of the liquid fuel component of the fuel is shown. Examples of implementation of modern cooling systems on typical designs of combustion chambers of modern rocket engines are considered. It is shown that the cooling efficiency will be higher the more belts of the cooling medium curtain are located along the length of the combustion chamber. At the same time, it should be taken into account that the use of an excessively large number of belts means a significant complication of the camera design, its manufacturing technology, and an increase in the cost of the product.
Longitudinal Impact of Straight Rod against Elastic Support
Authors: Zhernakov V S , Pavlov V P , Kudoyarova V M 
Published: December 2020

Abstract
The paper implements a series method for numerical analyze a stress state of a straight rod in the process of its longitudinal impact on an elastic support at a given initial free rod movement before its impact with a given speed. The problem solution is based on the entering a displacement function in trigonometric series. As a method implementation result, a computer program was created that allows multivariate calculations to be performed with high accuracy and the results output in a clear graphic form.
Development and research of elastic-damping device with variable stiffness
Authors: Kuznetsov N K , Iov I A , Iov A A , Dolgih E S 
Published: December 2020

Abstract
The article is devoted to the reduction of dynamic loads of actuating mechanisms of mining machines based on the use of elastic-damping devices with variable parameters built into the construction of these machines. It is shown that the determination of the parameters of these devices can be represented as a solution of the inverse dynamic problem based on a differential equation with variable coefficients. Using the example of a damping device proposed for reducing the dynamic loads of the digging mechanism of dragline ES 20.90, we describe the procedure for constructing the desired differential equation for synthesizing the device parameters and present the results of a numerical study of its effectiveness.
Modeling elastic deformations of the rotary dividing table faceplate under the action of the workpiece weight
Authors: Tsarfin B A 
Published: December 2020

Abstract
The article discusses the problem of determining elastic deformations of the rotary indexing table faceplate that arise when installing maximum allowable weight workpiece. A numerical analysis of the stress-strain state of the faceplate under loading with the same weight of its different sections consisting of concentric zones into which the faceplates was conditionally divided was performed. It has been established that the deformations under study can have a significant effect on the accuracy of the workpiece base. All calculations were performed in the CAE ANSYS finite element modeling software package. Based on the calculation results, the proposal was developed to modernize the design of the faceplate, which reduces elastic deformations.
Modeling maintenance of the machine-building complex
Authors: Lvovich I Ya , Lvovich Ya E , Preobrazhenskiy A P , Choporov O N 
Published: December 2020

Abstract
The problems associated with the modeling maintenance of the machine-building complex are considered. The forecasting technique for components based on one attribute in the framework of experiment is shown. The criterion is considered in terms of risk assessment for the consumer. The results of modeling of the main parameters characterizing the quality of electrolytic capacitors is demonstrated. After the tests are completed, the value of the predicted parameter will be determined for each of the implementations. The optimal value of the leakage current, which ensures the minimum probability of error, for tantalum electrolytic capacitors with a nominal capacitance is shown. The research results may be useful for specialists working in engineering complexes.
The issue of low resistance of punches when heading of sunk screw made of ferrite-pearlite steels
Authors: Galkin V V , Gavrilov G N , Ivanov S V , Bratuknin A V 
Published: December 2020

Abstract
The causes are investigated and the types of punches wear during extrusion of a cruciform slot in screws with countersunk head from ferritic-pearlite class steels, in particular, 16KhSN steel, are evaluated. The research methodology included two simulations of the M5 screw landing process using the DEFORM-3D software package. In the first simulation, using a generalized curve of the hardening of the material of the deformable workpiece, its stress state on the contact surface with the punch is determined. The obtained values were set in the form of a load on the punch when determining its stress state. The second simulation was carried out using the hardening curve of the punch material. The information obtained on the magnitude and distribution of stresses in the forming profile of the punch made it possible to draw a conclusion about the types of wear that are defined as loss of profile geometry and fatigue failure.