Results of researches on influence of heat treatment on physicomechanical properties of the clay slates and sandstone extracted in the Rostov region are stated. It is established that the decorative effect for clay slates can be gained by heat treatment at temperatures of 300-500C then rock on all volume changes color with gray to the red-brown. Thus durability of samples at a bend increases by 20-70%. For change of color of a front surface of natural stones structures of coverings on the basis of phosphatic sheaves and the developed low-temperature enamel were considered. For giving to a layer of necessary flowers various ceramic pigments were used. Frost resistance of stones with coverings on the basis of phosphatic sheaves and enamel more than 50 cycles that testifies to the high durability of coupling of a decorative layer with a stone surface. It is defined that by use of simple technological decisions and inexpensive raw materials, the range of flowers of natural stones can be expanded significantly.
Keywords: natural stone, heat treatment, volume coloring, decorative covering, durability, water absorption, frost resistance
The quantity of carbide component in the deposited coating made subsonic and supersonic gas-powder surfacing. The investigations, which revealed that the preferred method is a supersonic gas-powder surfacing in the lower position.
Keywords: supersonic gas-powder cladding, carbide component, protective coatings, subsonic gas-powder cladding microstructure
Results of laboratory researches on determination of suitability of clay raw materials of the Zvezdinsky field for production of a facing ceramic brick are stated by way of plastic formation. It is established that for receiving faultless products it is necessary to reduce air shrinkage and sensitivity to drying of a structure. Additives – sandy loam of the Dubovsky field and a fuel-bearing additive are for this purpose used. For increase of frost resistance of a ceramic crock entered the mineral modifying additive into a structure – waste of production of mineral fertilizers. Its introduction in number of 5% allowed to increase frost resistance to 50 cycles without deterioration of appearance of the burned samples. In addition, on the burned samples made of all structures there was a whitish raid. For the purpose of receiving a monophonic surface the svezhesformovannykh of samples applied special water solution for elimination of a white raid on two sides. These actions reached receiving the samples corresponding to facing products.
Keywords: clay raw materials, facing brick, plastic formation, mineral modifying additive, air shrinkage, sensitivity to drying, frost resistance
Article is dedicated to increasing the effectiveness of the regional integration policy of the Southern Federal University in southern Russia. The concept of creation and development of educational research and innovation complex - Department of regional integration on the basis of the higher school of the university.
Keywords: South Russia, South Federal District, Southern Federal University, technology department
The article investigates the formation and development of the network of the Cossack cadet corps in Russia. Cadet education is seen as a unique and effective system for producing high-quality secondary education and upbringing of the younger generation.
Keywords: Cadet Corps, military education, the Cossacks, traditions and education
The assessment of economy of the electric power and reduction of emission of greenhouse gases across the Nizhny Novgorod Region due to introduction of the equipment having marking in household sector, the budgetary sector and on other objects of energy consumption (buildings) on prospect till 2030 is carried out
Keywords: marking of power efficiency, engineering equipment, electrical household appliances
In article the basic principles and factors having impact on successful functioning of regional infrastructure are considered the analysis of priority investment projects of the Chechen Republic is carried out, practical recommendations about improvement of infrastructure service of real sector of economy are made.
Keywords: production infrastructure, target programs, priority directions, investment projects, social and economic problems, transport complex
in modern conditions become widespread trenchless methods for the construction of pipelines. The positive features of their use include increased speed pipeline installation, reducing the volume of excavation, etc. Existing regulatory documents limit the bending of the pipe at low temperatures need to be tested in terms of their applicability to new grades of polyethylene. The aim of this study was to determine the minimum permissible bending radius of the track, the passage of which in the conditions of negative temperatures polyethylene pipes PE80 would maintain its strength characteristics. By using a mathematical model dependency of the elastic modulus and yield point are calculated from the temperature stresses in the walls of pipes of different diameters in bending under different temperatures. In order to establish empirical relationships voltage on the pipe diameter and the radius of its bend procedure is carried out function approximation method of least squares. Presented obtained graphic dependences. Using the values of the yield strength of the material at different temperatures were calculated bending radius of all dimensions. If the production of the track plow trenchless pipe-layer will be considered given the conditions, you will be provided with the necessary conditions for installation.
Keywords: plastic pipe, trenchless pipe layer, the stress-strain state, trenchless techniques, pipelining
The article describes and analyzes how to determine the thermal residual stresses. The conclusion, based on the analysis, showed the necessity of the calculation method for determining the residual stresses, which is based on a mathematical model of the formation of residual stresses and deformations occurring during heat treatment. The results of calculation of stresses and comparison with experimental data are given.
Keywords: residual thermal stresses, finite element method, heat treatment, low-hard details
The phenomenon of buckling under the creep of concrete arches was investigated. Solution of the problem carried out by means of the finite element method. To analyze the stability we used Newton-Raphson method. It has been established that there is a long-term critical load, beyond which the growth of the deflection has not fading character. As the equation of the relationship between the creep deformation and strains we used viscoelastoplastic hereditary model of aging concrete. To determine the creep strain we used a linear approximation with respect to time. It was found that the long critical load for considered arch was in 1.44 times lower than the instant critical load.
Keywords: reinforced concrete arch, stability, creep, geometric nonlinearity, finite element method, Newton-Raphson method
In this paper we propose mathematical model of salient-pole synchronous generator of mini-CHP. The model is based on a full Park-Gorev differential equation. The saturation of the machine is taken by using the method of partial magnetic characteristics. This method allows most accurate evaluation of the change of parameters of an equivalent circuit of the generator in the absence of information about the magnetic properties of the machine. The model is Implemented in Simulink. Application of the model is possible when calculating the steady-state and transients in distribution electrical net wich contains salient pole synchronous generators.
Keywords: salient-pole synchronous generator, mathematical model, Park-Gorev differential equation, magnetic characteristics, transients
The article highlights main problems of agricultural development of KBR and basic measures of their solution. The necessity of state support of agriculture as a natural condition for the functioning of this industry is also justified.
Keywords: agriculture, government support, endogenous and exogenous factors, innovation development, technology
Infringements of variability of an intimate rhythm in a combination to attributes of electric instability of a myocardium are one of factors of diabetic heart.
Keywords: arterial hypertensia, diabetic heart, variability of an intimate rhythm.
The results received at research of influence electron beam treatment processings on tool life of a tungstenless hard alloy metal on the basis of TiC with a binding material an alloy Ni-Cr-Al and percentage of the components "basis-binding" 50 – 50% about are presented in the conditions of metal cutting. Influence electron beam treatment of a blanket of samples of the cutting tool insert on technological components of force of cutting when turning cut metal is experimentally revealed.
Keywords: Surface coating, hard alloy metal, structural and phase modification, electron beam treatment, tool life, metal cutting, wear, technological components cutting force
An analysis of science researches and production experience have shown that there is a need in the method of determining the number of vehicles and special technics for transport units in the pipeline industry. Decided to consider the system of transport and technological service of pipeline's repair processes as queuing system. A simulation method as a tool for determining the need of vehicles was chosen. The correlation between factors of primary production and the number of vehicles and special technics was determined.
Keywords: oil pipeline, car, special equipment, vehicle, demand for vehicles, modeling, quantity of technics, standardization, technical maintenance of cars