Литье и металлургия

The scheme of the development and establishment of tooling foundry technology for a wide range of products made of steel, cast iron, non-ferrous metals and alloys is studied.

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A number of scientifically grounded technical decisions, the whole set of which has enabled to create technological processes of production of high-quality cast bars of mass appointment is offered.

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The technology of production of iron-carbon alloys grit of JSC «BELNIILIT» are studied.

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The article is devoted to research of process of the iron-containing waste recycling in rotary tilting furnaces, in particular, to the phenomenon of formation of ball iron at transition from hard-phase to liquid-phase stage of iron restoration from scale.

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Comparison of chrome sand of Republic of South Africa abd chromite of new generation Spherichrone (producer the American company Oregon Resources corporation) for priduction of castings with surface of high quality is given.

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Numerical modeling of heat transfer coefficient on the surface of the water-cooled rod with a slotted and jet cooling was made. Calculations were carried out in a free, open source cFD software package OpenFOAM. It is shown that jet cooling is more uniform and intense compared to the slotted cooling.

Mechanisms of influence of inert gas on the melt for determination of ways of efficiency increase of different variants of the melt blowing are considered.

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The groups of alloy steel scrap. Suitable for wearresistant synthetic chromium and iron grades ich18VN ich18VM are studied and defined. Found that the number of alloyed steel scrap in the charge for these irons can be more than 85%, and the price of the charge decreases from 30 to 45%.

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Sources of harmful substances discharge from sources of casting houses are given. Distribution of harmful substances discharge into atmosphere by areas of casting houses and casting houses with various types of production is given.

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The results of dispersion of harmful substances discharge in environment from the sources of casting houses on the enterprise territory, sanitary protection zone and residential community are given.

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Possibility of forecasting of the harmful substances content in air of working zones of different areas of casting houses is shown.

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Microclimate parameters on workplaces of different areas of casting houses are considered. Considerable influence of microclimate parameters on workers, the effect extent of which is defined by the mechanization and automation level, applied technological processes and equipment for cores production, melting and pouring of metal, molding shake-out, is established.

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The received calculation data confirm the assumption on possibility of carrying out of silumins modifying processing with strontium carbonate in production conditions.

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The economic estimation of quality of casting technology of molding under dispensable patterns is given. The statistical analysis of deviations of technological parameters and value of losses of production at different stages of the whole cycle of castings production was applied for assessment of technology quality.

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Influence of the dynamic module on heat resistance of ceramic shells in casting under dispensable patterns is shown.

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The influence of iron content on optimum time of quenching and aging of the silumin AK8M3was investigated.

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Possibility of manufacturing hollow billets of 150 mm in diameter produced out of silumins by the method of freezing-up on steel water-cooled core was proven. effect of thermal parameters of the casting process on structure of billets was studied.

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The results of researches of macro- and microstructure, the structure, formed at primary crystallization of abrasion-resistant irons, and peculiarities of their change in process of thermal processing are given.

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Possibility and reasonability of application of self-fluxing diffusion-alloyed powders from the fraction production wastes for obtaining of coverings by welding method by currents of high frequency are considered. The structure and properties of the received coverings is investigated.

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The received results show that dephosphorization of alloyed cast irons provides improvement of mechanical properties, decrease of cold-shortness of moulded pieces at low consumption of dephosphorator.

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The statistical process control techniques, as applied to steel production, in particular, to the production modifiers and ligatures, are studied.

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It is shown that for improvement of physical and chemical properties of cast products, exploited inconditions of intensive contact with the abrasive environment, boron carbide of great interest.

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Prospects of application of the mechanically alloyed ligatures for production of chrome and chromozirconium bronzes are shown. The composition, structure and properties of alloys are studied.

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Complex rezearch of influence of duration of liquid phase irradiation by electromagnetic impulses on parameters of liquid state parameters is carried out.

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Experimentally found that the effect of nanosecond electromagnetic pulses to melt the charge, while the carbon thermal recovery of the tin ore, accelerates the formation of the metallic phase.

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This work studies the conditions for obtaining finely dispersed powders of molybdenum and tungsten by restoration of their oxygen compounds by aluminum in molten sodium chloride.

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Application of polarized light in the metallographic annalysis of metals and alloys is considered, its application for the analysis of ninmetallic inclusions is shown. examples of application of differential and interferential contrast for the annalysis of structure of metals in reflected light are shown.

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Research of influence of the magnetoimpulse processing frequency on change of morphology of graphite inclusions of is carried out.

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It is established that for production of the wood-cutting tool (cutting elements of disk saws, milling and plane knifes, etc.) it is reasonable to use chrome-vanadium white cast iron which after processing by hot deformation approximates the high-speed steels and even firm alloys by its operational properties, at considerably lower cost.

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The influence of alloying by manganese on the structure and hardness of high-chromium wear-resistant cast iron was investigated.

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As the result of the studies at PJSC « UKRNIIO them. A.S.Berezhnogo» the technology and commercial production of crucibles from stabilized zirconia for the smelting of platinum group metals are developed.

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It is shown that PSC «UKRNIIO them. A.S.Berezhnogo« has developed technologies for a wide range of induction melting temperature alloys and started commercial production of crucibles of different composition.

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Using a rolling line wire mill reducing-calibrating block the production of high-carbon wire rod subjected to combined thermomechanical treatment with controlled rolling and cooling, can reduce the spread of mechanical properties, reduce the depth of decarbonized layer with a uniform distribution in the surface of its rod on the perimeter, increasing the technological plasticity of rod in processing, virtually eliminating the formation of hardening structures on the surface during high-speed wire drawing.

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The application of the system of dynamic soft reduction on continuous casting machines is grounded. Their impact on the quality of macrostructure blanks is displayed.

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Possibilities of using a scanning electron microscope equipped with an microanalysis to study the quality of brass coating on the blank for the wire and steel cord production are shown.

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Set of activities performed by the machine for continuous casting mill № 3 has enhanced its productivity and also master a new product - continuous casting round billet for seamless drawn pipes in tube-rolling shop.

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The methods of optimization of the die channel geometry at wire drawing by the temperature criterion enabling to project geometry of deforming and calibrating zones of die are created.

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Aadvanced mode of valves № 14, 16 500 class thermostrengthening, allowed to increase the productivity of the mill 320 without degradation of mechanical properties, reduce the energy used to produce steel.

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Investigation by numerical modeling of influence of the form of deforming zone of die at drawing of steel high carbon wire on temperature and strained-deformed state in wire and die is carried out.

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Results of mathematical modeling of heat exchange processes in transfer heating furnaces of continuous operation type of machine-building production are given.

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The temperature-deformation criterion of assessment and optimization of routes of the thin high-carbon wire drawing enabling to increase plastic properties of wire at retaining of its durability is offered.

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Peculiarities of thermal regime of electroarc furnaces of various capacities and connection of power mode of melting with technological parameters are shown.

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Assesses the efficiency of the use of excess oxygen produced by the oxygen-compressor station in order to reduce the flow of oxygen gas and specific consumption of fuel, for the conditions of JSc «BSW».

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Developments of steel-pouring systems of new generation and grogs to them are presented to NPP «Vulcan-TM».

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The influence of the nanostructured modifier quantity on high-strength antipenetration coatings is analyzed and optimum range of its concentration (4,5%) is set.

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The algorithm of determination of an average interplate distance according to the computer image of the microstructure, enabling to improve degree of work automation of metallurgist is offered.

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Research of interrelations between parameters of the technology of rolled wire production and limit of its durability is carried out.

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The main details of foundry equipment are developed. Analysis of the process of filling and hardening of casting “Transducer case” is carried out on the basis of methods of mathematic modeling of foundry processes.

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The main tendencies of development of induction crucible furnaces are considered. Constructive differences of crucible furnaces in comparison with fuel furnaces are given. The area of their application is specified.

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The brief analysis of use of induction channel furnaces is given. The operating principle is considered.

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It is shown that vacuum melting of metals and alloys in induction furnaces enables to reduce considerably the content of gases and quantity of nonmetallic impurities, to provide high uniformity and density of ingot.

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The features of equipment for centrifugal casting are considered. Advantages and disadvantages of centrifugal casting machines.

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The analysis of the electroslag refining for electroslag casting is given. Its advantages and virtues are given.

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The exumple of the modern control system of melting pricess in are strrl-smelting furnace is given.

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The technological processes of production of dispensable patterns, sand molds and cores on three-dimensional printers are considered.

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The devices of the digital computer engineering operating as a part of the automated control system which are used for fixation of the operative information are considered.

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It is shown that the use of MS excel enables reduce time to find the regression coefficients in the calculations of similar matrices, and also simplifies the process of charting the influence of factors on the studied properties of the experiments.

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The main regularities of influence of the main alloying elements and impurities, contained in the components of alyumomatrix silica containing compositions, on recovery of silicon and its oxides in the melt aluminum while producing synthetic silumin are presented.

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The results of the analysis of the processes of interfacial interaction in casting alloys, based on the system Al-SiO2, obtained using heterophase (liquid-solid) mixing technology components-silica sand and aluminum are presented.

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This paper shows the practical application of algorithm for calculating the volume fraction of solids for the computer simulation of aluminum castings technology.

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The mathematical models and results of classification of alloys on the basis of aluminum on the specified brand with use of parameters of the computer thermal analysisare presented.

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It is shown that the use Scada-systems for the organization of various systems of automated processes is the most promising method of automation, that gives wide opportunities of control, analysis and management of compiex dynamic, real-time systems.

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The article contains recommendations to increase production rate of oil-well and injectivity of input well and description of oil reservoirs treating method by using energyof knock waves, highlighted the benefits of this method.

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The article describes the known and suggests a fundamentally new arrangements of the rotor’s central cutters.

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The construction of the executive body passing harvester provides separate rotary drive jumper and internal drill, thus increasing line speeds for milling rockteeth.

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Researches give grounds to believe in the possibility of receiving briquettes from coke waste mixed with peat dry coal and their use for smelting iron in the cupola or as ahousehold fuel.

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Methods of selection and appraisal of own technology (product, service, idea) which reflects its readiness for commercialization are offered.

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The technological aspects of processing and remelting of dispersed metal scrap, generated during polishing and grinding of tools made from high speed steel and carbide and lump scrap for the manufacture of drilling equipment and mining equipment are investigated.

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The main results of changing of high-strength antipenetration coatings in the result of development of the potentialities of their main component - refractory filler are given.

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The article deals with the creation of simulation models for modern learning tools - simulators based on software and hardware platform as in the training of specialists in production, as well as in teaching students at the university.

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It is shown that the received oil-coke pucks with application of coke granules can be used instead of liquid and gaseous fuel.

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Scientific support of the new method of determination of the natural gas combustion heat is considered. The developed method is realized in the experimental installation which passed industrial testing.

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The development of standards of natural oil and oil products at storage and acceptance in port tanks was carried out on the department of pipeline transport of UO «Polotsk state university».

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The researches of influence of vibrating processing regimes on mechanical and other properties of the welded joints received by fusion welding are carried out on the basis of the literary analysis of the works devoted to influence of vibrating oscillations on melted and crystallizing metal.

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The design procedure of the tubular resonator for a vibrating and peak densitometer is developed.

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Researches of carbonized layer of steel 12x18н10т are carried out. The new effect at distribution of the carbon front in the course of chemical and thermal processing of this steel is revealed.

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