Casting and powder metallurgy (B22)

B22            Casting; powder metallurgy(28746)
ethod of manufacture of products from pseudo-alloys molybden-copper // 2628233
FIELD: metallurgy.SUBSTANCE: method includes preparing the molybdenum charge, pressing the preform, sintering the preform to form a porous framework, contacting the side of the resulting preform with copper taken in excess, impregnating the preform with copper, and cooling it. The impregnated workpiece is cooled from the impregnation temperature to the crystallization temperature of copper. In the impregnated workpiece, a temperature gradient is created directed toward the area of the excess copper location from the opposite side of the workpiece, to allow the blank to cool from the side opposite to that region of excess copper.EFFECT: increase in the relative density of products and the absence of anisotropy of physical properties.2 ex
ethod of producing titanium powder // 2628228
FIELD: metallurgy.SUBSTANCE: method involves loading sponge titanium into a retort, vacuuming and heating it in a vacuum, feeding hydrogen to the retort with hydrogenation of the sponge titanium while cooling the retort, extracting the hydrogenated sponge titanium from the retort, grinding it and sieving it into fractions, charging the crushed hydrogenated titanium powder in the retort, dehydrogenating it, cooling the retort and extracting the titanium powder. Hydrogen is fed into the retort at a speed of not more than 360 m3/hour per 1m2 of the retort section with the provision of an excess hydrogen pressure in the retort of not more than 44 kPa. The hydrogenated sponge titanium is ground in an argon atmosphere at an excess pressure of not more than 10-20 kPa, and the dehydrogenation is carried out by sealing the retort, evacuating it to a residual pressure of 0.01 kPa, heating and supplying argon at an overpressure of 10-30 kPa, wherein hydrogen released during dehydrogenation together with argon with a residual pressure of 0.01 kPa and a thermal aging is carried out for 3-5 hours.EFFECT: production of titanium powder of a given shape, fragmentation, needle type, with a reduced content of gas impurities such as hydrogen, nitrogen, chlorine and oxygen is ensured.2 cl
Production method of tube billet by continuous casting with billet extracting upward from casting mould // 2628225
FIELD: metallurgy.SUBSTANCE: method involves pouring the metal melt into the casting mould cavity through the center gate system, the high melting inoculating particles supply into the center, and extracting of the hollow tube billet from the casting mould upward. The billet extraction from the casting mould is carried out at the rate of 0.05-0.08 m/min.EFFECT: uniform distribution of the introduced modifier in the hollow tube billet.1 dwg, 1 ex

Transporter // 2627827
FIELD: transportation.SUBSTANCE: transporter contains the roller elements, that circulate endlessly like a caterpillar along the circulation path U and are configured to drive by means of the drive at least two parallel guide tracks. Each of the tracks contains one or more bearing races of the rollers and each runs along the entire circulation path U. Each roller element contains the roller element body that includes the first end and the second end in the circulation direction and at least one roller respectively in the first end area and in the second end area. The rollers, disposed in the first end area of the roller element body, are configured to roll on the bearing races different from the roller bearing races, located in the second end area of the roller element body.EFFECT: provision of continuous moving with low friction along the entire circulation path, and in particular, in deflecting arcs and in the transition between the straight sections and the deflecting arcs.32 cl, 13 dwg
ethod of layer electron-beam sintering of products from ceramic powder // 2627796
FIELD: electricity.SUBSTANCE: in the sintering method containing the operations of depositing and aligning the powder layer, as well as electron irradiation of the applied layer, two electron sources are used that form two electron beams with an energy of 10-15 keV, one of which is defocused and irradiates the entire layer of powder, and the second beam is focused and scans the sintered area of the powder layer. Irradiation is performed in the range of inert gas pressure of 5-20 Pa. In the method, the preheating stage of the powder layer is eliminated, since a pressure range of 5-20 Pa ensures the formation of a beam plasma through which the electric charge brought by the electron beam flows from the powder particles to the grounded walls of the vacuum chamber. The uniformity of heating is achieved by continuous irradiation of the entire powder layer with a defocused electron beam, which ensures that the temperature is not sufficient for sintering. The addition of the power of the scanning focused beam ensures sintering according to the given pattern.EFFECT: reduction of the time spent on layer-by-layer electron-beam sintering of ceramic powder products while ensuring uniform heating of each layer of ceramic powder.1 dwg, 1 ex

Decomposable and adjustable metallic packing and its production technique // 2627779
FIELD: mining engineering.SUBSTANCE: packing comprises a plymetal. A plymetal comprises a cellular nanomatrix which has a metalliferous material of a nanomatrix, a metallic matrix that is housed within the cellular nanomatrix, and a degradative agent housed within the metallic matrix. A degradative agent comprises: cobalt, copper, ferrum, nickel, wolframium or the combination that includes at least one of the above-mentioned. A packing comprises the first packing surface and the second packing surface that is placed oppositely to the first packing surface. A metalliferous material of a nanomatrix, a metallic matrix and a degradative agent are selected in such a way that the packing is designed to form a metal-to-metal seal in return for contractive force application. A packing can be made by dint of the metallic matrix, degradative agent and metalliferous material of a nanomatrix powder combination with the composition formation; of the consolidation of the composition with compacted composition formation; of the compacted composition agglomeration; and of the compression moulding of the sintered composition with the packing formation.EFFECT: exclusion of the elements or tools removal from the borehole.24 cl, 18 dwg
ethod for producing cathode alloy based on metal of platinum group and barium // 2627709
FIELD: metallurgy.SUBSTANCE: method for producing a cathode alloy based on metal of the platinum group and barium includes pressing a weighed portion of a platinum group metal powder, cleaning the barium surface from oxides, combining the arc alloy of the compact and barium in an argon atmosphere using a non-consumable tungsten electrode. Before pressing the weighed portions of the platinum group metal powder, (25-70)% of the powder weighed portion is mechanically activated for 5-20 minutes, and the remainder of the powder weighed portion is mixed.EFFECT: improving the homogeneity of the intermetallic compound phase distribution in the platinum group metal matrix.2 tbl, 2 ex
ethod of producing pressed metal-alloy palladium-barium cathode // 2627707
FIELD: metallurgy.SUBSTANCE: intermetallide Pd5Ba is produced by melting, is ground in an atmosphere of inert gas or CO2 to obtain a powder, the resulting powder is mixed with palladium powder and mechanically activated by the planetary or vibrator mill for 5-15 minutes. The powder obtained after mechanoactivation is compressed, and the compact is sintered in an argon atmosphere in a beam of fast electrons at a temperature of (700-800)°C for 25-40 minutes.EFFECT: increasing the coefficient of secondary electron emission of the pressed metal-alloy cathodes Pd-Ba.2 tbl, 2 ex

ethod and device for additive manufacture of parts by direct material deposition controlled in electromagnetic field // 2627527
FIELD: metallurgy.SUBSTANCE: method comprises direct deposition of a flow of metal powder granules or non-metal from a storage container into a molten bath on a support table to form a part fused on by heat energy of a laser or electronic heat source and crystallization of the melt to form a part. Precipitation of the powder granules is carried out under the action of gravity and electromagnetic forces giving a positive or negative charge in flight. The trajectory and speed of movement of the powder granules in flight is controlled by means of electromagnetic field in accordance with the specified program. A device for additive manufacturing of parts is also proposed.EFFECT: improving the efficiency of additive manufacturing of parts.23 cl, 6 dwg

ethod for producing photocatalizer based on a mechanoactivated powder of zinc oxide // 2627496
FIELD: nanotechnology.SUBSTANCE: invention relates to methods for producing photocatalysts for the decomposition of substances polluting air and water, and can be used in the chemical, pharmaceutical and biosynthetic industries. The method is that the ZnO powder is subjected to intensive mechanical treatment in air. At the same time, the grinding speed in the grinding drums of a planetary ball mill is 250 rpm, the ratio of powder mass and balls is 10:1, the grinding time is 1 minute.EFFECT: due to mechanoactivation of zinc oxide powders with specified process parameters, their photocatalytic activity increases.3 dwg
ethod for manufacturing watch case // 2627214
FIELD: physics.SUBSTANCE: method for manufacturing watch case is proposed, wherein an inner part of the case is moulded, machined to produce two grooves for subsequent fixation of the decorative insert in them, a casting mould is produced for casting the decorative insert, forming the geometric pattern of the required watch case. Part of the casting mould shape is the inner part of the case, obtained earlier. Then waxing; casting and cutting of the decorative insert; final milling and polishing of the watch case are carried out.EFFECT: reduction of the weight of the precious metal in the product with simultaneous rigidity of the product.5 cl, 2 dwg
ethod of producing ultra-dispersed titanium carbide powder // 2627142
FIELD: metallurgy.SUBSTANCE: metal titanium is placed in the oven, the furnace is heated up to 700÷850°C and supplied to the surface of the metallic titanium hydrocarbon component in gaseous form together with argon for 90÷180 minutes.EFFECT: obtaining a needle-shaped titanium carbide powder with a particle diameter of 50-200 nm.1 tbl, 5 dwg

ethod of producing powders from heat-resistant nickel alloys // 2627137
FIELD: metallurgy.SUBSTANCE: method involves the melting of the rotating cylindrical casting workpiece end with the plasma flow, provding the centrifugal spraying of the melt and forming the particles, solidifing into the micro ingots, when flying in the atmosphere of the cold plasma-forming mixture of gases, containing the inert gases and the hydrogen. The nitrogen is additionally introduced into the plasma-forming mixture of gases and maintains its concentration in the mixture at the level, that provides the gases ionization in the plasma flow and the ions interaction with the melt, saturation of the melt with nitrogen upto the level higher than its limiting solubility in the solid solution, typical for the heat-resistant nickel base alloys. Cool the micro ingots in the cold plasma forming mixture of gases at the rate of at least 103 C °/ sec.EFFECT: increase of the heat-resistant nickel alloys strength characteristics.1 tbl, 1 dwg

Tooling for turbomachine blade cast core manufacturing // 2627084
FIELD: metallurgy.SUBSTANCE: tooling for the core manufacturing contains the casting mould (40) for feeding the ceramic mass in which the working cavities (42, 44) of one the first part and at least one other part of the core are performed and facilities (50, 54) for supporting and sealing the end parts of the ceramic rod, that connects the mentioned core parts and passes through the working cavity of the first core part. In the working cavity of the first core part the tooling contains the facilities (58) of the rod middle part support.EFFECT: prevention of the rods breakage, when feeding the ceramic mass into the mould.19 cl, 10 dwg

ethod of impregnation of ceramic rods for manufacturing turbo machine blades // 2627070
FIELD: metallurgy.SUBSTANCE: method of impregnation of a ceramic rod, used in the manufacture of turbo machine blades by casting consumable patterns, includes the immersion of the rod into a solution of polyvinyl alcohol PVAl in water, the subsequent immersion of the rod into pure water and high temperature polymerization of the rod. A solution of polyvinyl alcohol in water with a concentration of 100 to 200 g/l is used. Preferably, the impregnation time of the rod is from 20 minutes to 1 hour 30 minutes.EFFECT: increased mechanical strength of the ceramic rod.5 cl, 3 dwg

Segmented rod and method of moulding the impeller // 2627069
FIELD: metallurgy.SUBSTANCE: segmented rod for moulding the impeller contains at least three segments (2) having the same shape. Each segment (2) contains a connecting means (3, 3') to connect with neighbouring segments (2). Method of moulding the impeller stem includes an assembly of at least three identical segments (2), placing the rod moulding tool, moulding rims, removing the impeller from the tool, remove the rod from the impeller. The impeller can be manufactured by injection moulding of thermoplastic polymer or tin-bismuth alloy.EFFECT: simplification of the process of injection moulding complex parts.15 cl, 6 dwg
ixture for manufacturing moulds // 2626698
FIELD: metallurgy.SUBSTANCE: invention can be used for manufacturing moulds used in the production of cast bimetallic hot-forming dies, moulds for pressure moulding, forging dies for solid liquid forging. The moulding mixture contains, % by weight: a steel shot of 50-60, flue gas dust of electric arc furnaces 4-6, phenol-formaldehyde resin 3-6, a 25% aqueous solution of copper nitrate crystalline and a 16% aqueous solution of cobalt diamide as a catalyst 0.3-0.6, zircon sand as a filler is the rest.EFFECT: increased gas permeability of the mixture refractory properties.1 cl
End plate for containers of hot isostatic pressing, container of hot isostatic pressing and method of hot isostatic pressing // 2626697
FIELD: machine engineering.SUBSTANCE: end plate for the container comprises a central region and a main region extending radially from the central region and ending at a corner along the perimeter of the end plate with the edge of the container. The thickness of the end plate increases from the central area to the corner along the perimeter of the end plate and determines the taper angle. The inner surface of the corner along the perimeter of the end plate is made with a rounded part providing a smooth transition of the main area to the edge of the perimeter. The container comprises a cylindrical body portion and two end plates. A method of hot isostatic pressing using the container is also provided.EFFECT: eliminating the shortage of cylindrical containers, consisting in the difficult cleaning of its internal volume after assembly, and improving the filling of the container and enhancing the efficiency of vacuum degassing.21 cl, 15 dwg
Gas purge plug, containing weave indicators // 2626696
FIELD: metallurgy.SUBSTANCE: purge plug (1) for the gas comprises a refractory material housing (2) with an inlet (3a) for gas at the inlet end (2a), a gas outlet (3b) at the outlet end (2b), a final visual indicator (5) wear and an intermediate visual wear indicator (4). The indicator (5) is in the form of an elongated core and is located from the first inlet end (2a) to a distance h1 along the central longitudinal axis X1. The indicator (4) is partially inserted in the indicator (5) and is located at a distance h0 from the inlet end (2a) to the final distance h2. The length H of the body (2) and the length of the indicators (4, 5) are related by the relation h0<h1<h2<H. The housing (2), the indicator (5) and the indicator (4) are made of different first, second and third refractory materials, whose appearance at a temperature of 800-1500°C visually differs.EFFECT: obtaining information on at least four levels of erosion of the purge plug.11 cl, 4 dwg

Structure of pouring nozzle // 2626694
FIELD: metallurgy.SUBSTANCE: slide gate for the pouring nozzle contains a fixed metal frame 20, a sliding metal frame 30 and an opening and closing metal frame 40. The contact surfaces 33a and 46b of the sliding elements 33 and 46, installed on the metal frame 30 and the metal frame 40, are arranged at a predetermined distance from each other in front and rear in a sliding direction equal to or larger than the diameter of the nozzle opening. The contact surfaces 33a are made with a recessed part 34 and projecting parts located in front and rear of the recessed part. The contact surfaces 46a are made with a recessed part 47.EFFECT: decreasing surface roughness and chipping in the vicinity of the pouring nozzle opening of the used plate.6 cl, 8 dwg, 4 tbl, 1 ex
Production method of high-porous metal castings // 2626518
FIELD: metallurgy.SUBSTANCE: method involves the filler backfill impregnating by the vacuum suction of the metal or alloy melt, which melting temperature is below the melting temperature of the filler. Provide the preparation of the filler backfill by mixing and compacting of the coarse and finely particles sodium chloride masses at the ratio, that is calculated according to the specified formula. The grain size of the finely divided sodium chloride is calculated from the specified formula, taking into account the grain size of the coarse divided sodium chloride and the axes angle of inclination in the artificial soil model, which is the function of porosity.EFFECT: casting sporosity increase made from the metals and alloys, containing the aluminium or magnesium as the main element.3 ex
ethod of surfacing monolyle of copper bulbs to metal contact surface of heat exchanger // 2626263
FIELD: heating system.SUBSTANCE: contact surface of the heat exchanger is pre-coated with a layer of high vacuum oil, the heat exchanger is placed in a sintering container, the container is filled with copper balls with a size of 100 to 500 mcm, the copper balls that have not adhered to the high-vacuum oiled surface are poured from the said container and poured into a sintering container With excess beads of alumina that are equal to or less than copper balls, load the container into a vacuum oven with a vacuum level of at least 10-5 Mm Mercury column and heated to a sintering temperature of 800 to 900°C. Heating is carried out with holding at the boiling point of a high-vacuum oil for complete removal of oil vapours. The monolayer is then sintered from the copper balls to the contact surface of the heat exchanger for 2 to 4 hours.EFFECT: monolayer of metal balls is welded to predetermined areas of the heat exchanger surface, regardless of their spatial orientation.1 ex

ethod of manufacture of profiled couches and device for its implementation // 2626255
FIELD: metallurgy.SUBSTANCE: device for manufacturing the moulded chill moulds comprises a slab 1 of the shotgun head, a divider 2, a shell 3, a mounting plate 4, a main channel 7 for inflating the sandy-argillaceous mixture (SAM), additional channels 6, a semi-choke 8 with ventilation channels and a modem 9. The method for manufacturing the moulded chill moulds comprises applying the facing layer by blowing the SAM through the main channel 7 onto the inner surfaces of the upper and lower half-kook using the modem 9 and assembling the lined half-kinks. In addition, the gas turbine is injected into the labyrinth, thin-walled cavities of the half-kook remote from the main channel by means of the gas flow divider 2 through additional channels 5.EFFECT: improved filling and increasing the density of the facing layer in the remote cavities of the chill mould.2 cl, 3 dwg
Production method of castings in induction furnace // 2626114
FIELD: metallurgy.SUBSTANCE: in the method provide the preparation, charge and melting of the stock in the melting pot with the bottom drain, the melting of the plug and the metal discharge into the mould, after charging the stock into the melting pot the oxygen-free flux is added, wt %: alumina 10÷12, fluorspar 7÷10, cryolite is the rest in the amount of 10÷15% from the mass of the stock. The plug is made of the material with the melting point at 100-200°C is higher than the metallic part of the stock, in the content of which it is taken into account, and its melting is carried out together with the stock. The melting pot and the mould is placed in the single female inductor, and the stock has the following composition, wt %: metal part 95÷97 and ferrosilicon 3÷5.EFFECT: invention makes possible to improve the quality of the iron based castings by performing the melting in the flux protective medium during induction heating and introduction of the active alloying elements.5 cl, 6 ex, 1 tbl, 5 dwg

ethod of producing nanopowder of cobalt ferrite and microreactor to this end // 2625981
FIELD: technological processes.SUBSTANCE: method comprises supplying the primary components - a mixture of solutions of cobalt and iron salts in the ratio corresponding to stoichiometry CoFe2O4, and an alkali solution in proportion to the salts solutions providing acidity of the medium in the range from 7 to 8, corresponding to the conditions of coprecipitation of the components, while the solutions of the primary components are supplied in the form of thin jets with a diameter of 50 to 1000 micron at the speed of 1.5 to 20 m/s colliding in the vertical plane at the angle of 30° to 160°, at the temperature in the range of 20°C to 30°C, and a pressure close to atmospheric pressure. The usage ratio of the primary components is set in such a way that when the jets collide, a liquid fog is formed in which the solutions of the primary components are mixed and engage. The microreactor for the method comprises a housing 1 and nozzles 2 with flow diffusers 3 for supplying primary components 10 and a nozzle 4 for products removal, the microreactor housing 1 is of a cylindrical shape with a conical bottom 5, a cover 6, the nozzles 2 with flow diffusers 3 for supplying primary components 10 are made with the possibility to provide fine adjustment of the jet direction, in the cover 6 coaxially to the housing 1 a nozzle 9 is provided for supplying purging gas, and an outlet nozzle 4 is installed in the bottom 5 to remove purge gas and reaction products. The area of the outlet nozzle 4 is 20-50 times bigger than the total area of all nozzles for supplying primary components. Two or more nozzles 17 may be installed in the cylindrical part of the housing to supply a surface-active substances solution in the form of thin jets with a diameter of 10 to 1000 micron, directed to the liquid fog of the primary components engaging solutions.EFFECT: invention enables to reduce the temperature and pressure necessary to make a synthesis of oxide nanoscale cobalt ferrite particles, to reduce energy costs and ensure continuity of the process with the possibility of its implementation on an industrial scale, to reduce the cost of equipment, to increase yield and selectivity of the process, to provide optimal conditions for rapid reactions via maintenance of stable and effective hydrodynamic conditions for reagents contacting and rapid removal of reaction products.3 cl, 5 dwg, 2 ex
Lubricant for continuous casting processes // 2625925
FIELD: metallurgy.SUBSTANCE: lubricant composition contains a dispersion of a lubricating powder having a melting point of less than 600°C at the pressure of 1 atm, in a liquid medium. The powder is carbon in the form of graphite, crushed coke or lamp black, fluorides and oxides. The average powder size is 20-40 mcm. The liquid medium is an oily medium having a kinematic viscosity of 25-100 mm2/s at 40°C. Lubricating composition is introduced into the mould in the amount of 100-500 g per ton of steel casting.EFFECT: use of lubricating composition ensures, during the steel casting, a reduction in the formation of scale and cracks in the ingot.17 cl

Reactor for obtaining fuel inorganic compounds by self-spreading high-temperature synthesis // 2625922
FIELD: metallurgy.SUBSTANCE: reactor comprises a housing in form of a pipe with cooling water jacket and fungal closures closing the pipe to form a chamber for placing powder exothermic reaction mixture, an initiator disposed in said chamber, and a frame made in form of two square support plates interconnected by four columns. Housing is fixed by two brackets on the frame with the possibility of rotation about the vertical axis in its working position along the axis of frame by means of drive to ensure the loading of powder exothermic reaction mixture into the chamber. Fungal closures are made pressed to base plates of frame and equipped with locking devices with drives.EFFECT: increasing resource and efficiency of reactor due to the removal of axial loads on its housing.1 dwg

ethod of producing items from powder materials and device for its implementation // 2625920
FIELD: technological processes.SUBSTANCE: method includes placing the powder material in the form of a compact cake pressed into the shell in a container that is filled with loose thermal insulation material and initiating the combustion of the briquette. A compressive axial load is applied to the briquette by means of a punch. Initiation of the combustion reaction of the briquette is carried out by heating the briquette over the entire side surface of the shell by means of a heating element located on the inner surface of the shell of the container, with the discharge of impurity gases formed as a result of combustion of the powder exothermic material through the drainage openings of the shell, and after the combustion of the powder exothermic Material, the resulting product is removed from the sheath. The invention proposes also the device to this end.EFFECT: increased quality of products.2 cl, 2 dwg
ethod of manufacture of foundry high-fire-reinforced ceramic forms // 2625859
FIELD: metallurgy.SUBSTANCE: method involves the preparation of a refractory slurry, the layered formation of refractory layers from it on the model, the removal of the model, the drying of the ceramic mould, its impregnation, re-drying and firing. After firing, a waterproof organic film former is applied to the outer surface of the ceramic mould. On the inside, the mould is impregnated with a hydrosol containing at least one oxygen-containing compound with an element selected from the group: rare earth metal, hafnium, zirconium and aluminium. Impregnation is carried out at least twice with intermediate drying.EFFECT: consolidation of the face layer of ceramic forms, increase of chemical inertness of ceramic forms to melts of high-temperature alloys, refractory and chemically active alloys, increase of mechanical strength.4 cl, 6 ex

ethod of obtaining contact inserts of trolleybuses // 2625622
FIELD: electricity.SUBSTANCE: powder compositions based on carbon from the press container are extruded through the mouthpiece to produce a semi-finished product in the form of two insert blanks facing each other with their soles and separated by the divider with opposite profile working surfaces. The profile working surfaces are calibrated in a four-roll pass with two profile drive rolls. Prior to the calibration of the profile working surfaces and thereafter, the inclined inlet and outlet sections of the insert blanks are compressed in the forming pass of the profile drive rolls with a normal specific force of 45÷50 MPa.EFFECT: improving the quality of contact inserts.2 cl, 2 dwg

ethod of intermetallic alloys processing, based on titanium gamma aluminide // 2625515
FIELD: metallurgy.SUBSTANCE: method of intermetallic alloys processing, based on titanium gamma aluminide, which includes directional, floating-zone refining of the casting cylindrical billet from the intermetallic alloy, based on the gamma titanium aluminide in the inert gas atmosphere. Directional, floating-zone refining of the billet is carried out in the vertical reactor. Heating and melting of the billet is carried out by means of the inductor, moving from the bottom to the top with the constant speed of 150 mm/h with the power, providing the melted zone length, not exceeding the casting diameter and the axial temperature gradient of at least 300°C/cm, using the alternating induction current with the frequency in the range of 10 kHz - 1 MHz. Argon or helium is used as the inert gas.EFFECT: yield limit and alloys strength values are increased, the mechanical properties uniformity is enhanced by creating the ordered lamellar-granular phase alloys microstructure.2 cl, 3 dwg, 1 tbl, 1 ex

ethod of production of nanocrystal powder material for manufacture of wild-strip composite material // 2625511
FIELD: technological processes.SUBSTANCE: method includes grinding an amorphous tape of magnetic-soft alloy in a hammer mill to particles of 3-5 mm and then grinding in a high speed disintegrator. Heat treatment of the particles obtained after grinding in the hammer mill is carried out with the provision of removing the quenching stresses. Grinding in the disintegrator is conducted to obtain a powder of 100-200 microns. From the obtained powder, 30 wt % of the powder is screened to make the first layer of the composite. The remaining powder of 100-200 mcm is heat-treated to form nanocrystal pre-precipitates, followed by grinding in a disintegrator to obtain a powder of 50-100 mcm. The 50 wt % of the obtained powder is screened to make the second layer of the composite. Heat treatment of the remaining 50-100 mm powder with the formation of a nanocrystal structure is performed, after which it is milled in a disintegrator and screened to obtain a powder of 1-50 mcm to produce the third composite layer.EFFECT: it is possible to obtain three fractions of the powder in one process cycle and increase the efficiency of grinding.2 cl, 1 dwg, 1 tbl, 2 ex
ethod of producing fillers for building materials // 2625388
FIELD: chemistry.SUBSTANCE: aluminium salt in the amount of 40 to 100 g/l is dissolved in a boiling aqueous solution of 10-50 wt % of carbohydrate, a disintegrant is added in the form of aluminium nitrate solution of 5-50 wt % with an aluminium content of up to 70-350 g/l, then the solution is evaporated to a brown mass of viscous consistency, the resulting mass is placed in a crucible and heated in a muffle furnace in air at a temperature of 250-400°C until the loss of mass ceases, after which the temperature is raised to 800-1200°C, and calcined until the carbohydrate burns out completely. Oxychloride, acetate and aluminium sulphate can be used as an aluminium salt, and cane sugar - as a carbohydrate.EFFECT: preparing a filler for building materials in the form of aluminium oxide powder having a low bulk density, low thermal conductivity and high porosity.3 cl, 3 ex, 3 dwg
Compacted agent for roller melt treating // 2625379
FIELD: metallurgy.SUBSTANCE: compacted agent contains, wt %: calcium carbide 20-30, ash of soda 10-15, fluorspar 15-30, magnesium addition alloy is the rest. The alloy containing 50% silica, 10% calcium, 10% magnesium, the rest is iron is used as the magnesium addition alloy.EFFECT: invention makes it possible to obtain the high-alloyed cast iron with minimal sulfur content in its composition, nonmetallic inclusions, with the homogeneous structure and properties, which guarantees the increase of the performance criteria of the rolls.2 cl, 2 tbl
ethod of manufacturing composite material for microwave electronics // 2625377
FIELD: metallurgy.SUBSTANCE: method includes sealing a split compression mould by slip casting a mixture of fractions 1÷15 mcm and 35÷50 mcm of silicon carbide of hexagonal structure of 6H syngony with a binder in the form of sodium liquid glass and paraffin at a temperature of 70÷75°C and pressure 0.5÷1.0 MPa, extraction of the workpiece from the compression mould, workpiece sintering at a temperature of more than 750°C, impregnation of the workpiece with an aluminium alloy melt with a silicon content of 6÷12% in a heated mould at a temperature of 890-900°C, a pressure of 80-100 MPa for 30-50 s and crystallization by creating a temperature gradient.EFFECT: increased specific density, heat conductivity and strength of composite material.1 tbl, 6 ex
anufacture method of composite alloys and plant for its implementation // 2625375
FIELD: metallurgy.SUBSTANCE: manufacture method of the composite Al-Ti alloy, reinforced by the titanium aluminides Al3Ti, involves melting and melt processing in the continuous mode in the melting vessel by means of the plunger-vibrator, immersed in the melt and performing the low-frequency oscillations in the range of 16-160 Hz with the amplitude δ, defined by the expression δ=1500η/(R02μρ), where η - dynamic viscosity of the melt, μ - frequency of oscillations, ρ - alloy density, R0 - the radius of the piston. Simultaneously with the vibrational oscillations, the melt is affected by the unipolar electromagnetic impulses with the frequency of at least 1000 Hz, the impulse duration not exceeding 1⋅10-9 and the power of at least 1 MW. The plant to obtain the composite alloy contains the melting pot and the piston vibrator, placed in the melting pot and connected through the rigid rod to the source of harmonic sound frequencies. The plant additionally contains the unipolar electromagnetic impulses generator with the frequency not less than 1000 Hz, the impulse duration not more than 1⋅10-9 and the power is not less than 1 MW, closed into the electric circuit on the piston vibrator, and the melting pot made of graphite. The piston is isolated from the rod by the dielectric gasket, the distance from the lower edge of the piston to the bottom of the melting pot is not more than 1.5 melting pot diameters and not less than the melting pot radius, and the clearance between the side walls of the piston vibrator and the melting pot is in the range of 0.025-0.1 of the melting pot radius. The alloy is characterized by submicrometer grain dimension at the uniform distribution of the composite components throughout the volume of the ingot.EFFECT: increase of the alloy performance characteristics.2 cl, 1 dwg, 1 tbl

System for recycling wet carbon-containing wastes // 2625189
FIELD: chemistry.SUBSTANCE: system contains a boiler body, a fluidized-bed furnace, a heat exchanger and an ash collector, the furnace contains a vaulted shell of refractory material with a grate located at a distance of 1/3 of the body height from its lower part, on which the nozzle array is located. The total area of nozzle apertures is about 30÷50% of the grate area, and a screw unloader is installed in the lower part of furnace body. On the grate there is an inert carrier in the form of coarse-grained quartz sand, and inside the boiler body there are water-heating pipes connected to the heat consumer. The nozzle is supplied with a coolant from an air blower connected by a heat pipe to the outlet of a high-temperature air heater of the heat exchanger, and a vortex nozzle-burner is installed in the side wall of the boiler, operating from gaseous fuel, for example biogas coming from a bioreactor. The waste is supplied from the pneumatic loading device through a spraying device made with a tangential supply of the heat carrier, and the chimney is located in one of the side walls of the boiler and is connected by a heat pipe with a heat exchanger, the output of which is connected to the ash collector containing an inlet branch, a body, an outlet, a hopper, irrigation and spray nozzles, which are used as centrifugal nozzles for spraying liquids.EFFECT: improving the efficiency of energy conservation and purification of flue gases.2 cl, 2 dwg

Production method of nanostructured powder of the nickel-cobalt solid solution // 2625155
FIELD: metallurgy.SUBSTANCE: method includes the interaction of crystalline slightly soluble nickel and cobalt carbonates with the reducing agent in the form of the aqueous solution of hydrazine hydrate in the concentration of 9.6 wt %.EFFECT: monophasic powder production that does not contain oxide and hydroxide impurities.4 dwg, 2 tbl
ethod of production of steel powder with low oxygen content // 2625154
FIELD: metallurgy.SUBSTANCE: method involves heat treatment of the steel powder at a temperature of 900-1200°C in a hydrogen medium and cooling in an argon medium. Prior to heat treatment of steel powder at a temperature of 900-1200°C the steel powder is heated up to a temperature of 600-750°C in argon medium and held in carbon tetrachloride medium at a temperature of 600-750°C for 10-30 minutes. The heat treatment of the steel powder is carried out at a temperature of 900-1200°C in hydrogen medium for 40-60 minutes.EFFECT: reduction of labour intensity and duration of the powder production process.4 ex
ethod for obtaining a submicron powder of alpha-oxide of aluminium // 2625104
FIELD: chemistry.SUBSTANCE: way of obtaining a submicron powder of alpha-aluminium oxide involves processing of aluminium hydroxide derived way Bayer in the mill with zatravochnymi particles, drying, calcination and disaggregation of the received powder by grinding in an organic solvent. As a dose, the alpha alumina nanopowder with particle sizes less than 25 nm in the amount of 1-5 masses % is used. The mixture of aluminium hydroxide with seed is treated by the dry grinding method in a ball mill with the addition of 20-30 wt % of hexane. Then, drying is carried out in air and calcination at 900-950°C in the airflow. Forced air flow over the calcined material has a temperature in the range of 500-950°C. Rate of temperature rise at calcination 300°C/hour.EFFECT: invention makes it possible to obtain a powder consisting of alpha-alumina particles of spherical shape, weakly aggregated, with a narrow particle size distribution, suitable for obtaining a dense aluminium oxide ceramic with a reduction in energy costs.3 cl, 1 dwg, 5 ex
ethod for restoring the work surface of crystalliser walls // 2624878
FIELD: metallurgy.SUBSTANCE: method includes cleaning the working surface of the crystalliser walls, blasting the worn out areas adjacent to the corners of the mould and located in the lower part of the working surfaces of the walls made of copper or its alloys, and high-speed gas flame spraying on them of a heat-resistant wear-resistant coating in the form of mechanically activated powder cBN-Ni3Al-Si-C-Co-Y with the following component ratio, wt %: cBN 21-34, Ni3Al 37-40, Si 9-12, C 3-5, Co 12-15, Y 5-7, starting from a wear depth of at least 250-450 mcm, a thickness not exceeding the value of wear. A high-speed flame spraying said coating is performed in a protective atmosphere of argon at layer NiAl 100-150 microns thickness having a shape memory effect, the catalyst supported on the wall worn.EFFECT: invention allows to carry out a recovery operation without disassembly of the mould, improve wear resistance and coating adhesion of the coating to the working surface of the mould.2 cl, 3 ex

Heating system and method for heating a bucket for receiving liquid metal // 2624580
FIELD: metallurgy.SUBSTANCE: heating system comprises a heating device and a bucket hopper, at least, one extraction unit for extracting gases from the interior. At the same time, the gas expander for extracting gases through the exhaust system has, at least, one exhaust channel passing through it, with an inlet, through which gases penetrate the exhaust duct. The inlet is provided on one of the inner hopper sides facing the interior space. In this case, the difference in altitude between the highest point of the inlet and the lowest point of the bottom is not more than 0.8 from the greatest extent of the interior space in height.EFFECT: improving the efficiency of the gas removal from the hopper interior.7 cl, 2 dwg
ethod for producing massifs of cobalt nanowires // 2624573
FIELD: chemistry.SUBSTANCE: method involves electrodeposition of cobalt in the pores of the track-etched membranes electrolyte containing⋅ CoSO4⋅7H2O - 300-320 g/l, H3BO3 - 30-40 g/l, at pH 3.5-3.8 and temperature 40-45°C. Electrodeposition is performed using a potential sensor in the form of chloride-argentic reference electrode at a fixed distance between the cathode and the chloride-argentic reference electrode constituting 2-4 mm, and controlled by a constant voltage of 750-900 mV between them.EFFECT: improved homogeneity adjustment wires.4 ex
ethod of producing billets from alloys based on intermetallides of nb-al system // 2624562
FIELD: metallurgy.SUBSTANCE: method includes hydride-calcium synthesis of alloy powders and their consolidation by pressing and vacuum sintering. The charge consisting of Nb2O5 and Al2O3 oxides, is mixed with calcium hydride and thermally treated at a temperature of 1100-1300°C hours with the provision of hydride-calcium synthesis of alloy powders selected from the series of Nb3Al, Nb2Al and NbAl3, after which the resulting alloy powders are treated with water and then with a solution of hydrochloric acid, the washed powder is dried and classified. Consolidation of the powder is carried out by pressing and sintering in a vacuum at a residual pressure not higher than 10-4 mmHg; at a temperature of 0.77 to 0.87 of the alloy melting point for, at least, 2 hours, with the formation of a residual porosity of not more than 5%.EFFECT: ensuring the production of billets with controlled phase and chemical composition.2 cl, 4 ex, 4 tbl

Device for pressing powdered products // 2624277
FIELD: machine engineering.SUBSTANCE: device contains a matrix, inside of which a punch is installed, and a punch-matrix which is made composite with a blind forming cavity that is adjacent to the end of the matrix. The punch-matrix consists of two-piece upper and lower semimatrix. There is a forming hemisphere cavity, divided along the centerline, in each semimatrix. The matrix and punch-matrix are enclosed in a shell and fixed by covers on both sides. The lower semimatrix can be made of four identical parts, and the upper semimatrix is made up of two identical parts.EFFECT: improved quality of spherical products and saving powder by size pressing.3 cl, 2 dwg
ethod of manufacturing a modificator for foundry aluminium alloys in the type of a roll with a pressure filled modificator based on nanouglerod // 2624272
FIELD: metallurgy.SUBSTANCE: rod is produced by rolling an aluminium plate to a thickness of 0.2-0.3 mm, recrystallization of the obtained aluminium strip at a temperature of 200-300°C, applying a friable modifier based on nanocarbon on it and then pressing the strip with a modifier into the bar.EFFECT: invention makes it possible to improve the mastering of the alloy modifier and thereby improve the mechanical and performance characteristics of castings made from these alloys by reducing the dimensions of aluminium dendrites, αsolid solution, eutectic and primary silicon crystals.4 dwg

Apparatus and method for continuous casting of largesteel billet // 2624271
FIELD: metallurgy.SUBSTANCE: device comprises a collet carriage (6) with the clamping device (6a), a separating device (7) and the first drive (6b). With collet carriage (6) the workpiece (2) is clamped and pulled out of the mould (1) in the vertical direction (3) casting with the casting speed. Then continuously formed in the vertical direction (3) the workpiece (2) rests on the holding trolley (8) is removed and clamping the workpiece (2) collet carriage (6). The collet (6) is moved opposite to the casting direction (3), the workpiece (2) is clamped by the collet (6) and pulled from the mould (1), the workpiece (2) is separated by the separating device (7), which is moved during separation with the preform (2), and the separated preform (2') is removed.EFFECT: simplicity of structure and stability of an apparatus for the continuous casting of the large workpiece.15 cl, 33 dwg
ethod of modifying magnesium alloys of the mg-al-zn-mn system // 2623965
FIELD: metallurgy.SUBSTANCE: method involves melting magnesium alloy components introduction in protective gas medium without applying flux and melt at the temperature modifier purging 730-750°C. As a modifier, a mixture of chladone with argon is used in the ratio (1:1)-(1:3).EFFECT: increase of mechanical properties and corrosion resistance of the alloy.2 tbl, 1 ex
ethod for producing iron powder from lubrication oil // 2623946
FIELD: metallurgy.SUBSTANCE: method involves heating the lubricating oil, which contains dispersion iron powder particles up to a temperature of 65-90°C and subsequent magnetic separation by feeding the heated lubricating oil to the magnetic separator in the opposite direction to the magnet rotation, followed by separation and collection of dispersion iron powder particles coated with an oil film. The dispersion particles are washed with a 3-8% aqueous solution of industrial detergent heated up to 80-90°C for 15-20 minutes at constant stirring, left to stand for 30-40 minutes, washed with hot water at a temperature of 80-90°C and dried at a temperature of 90-110°C to obtain an iron powder in the form of dispersion particles.EFFECT: method provides a reduction in the energy intensity of the process, reducing the labour intensity of the process of obtaining iron powder.2 ex
ethod of manufacturing disperse-hardened composite electrode material for electric alloying and electric arc surfacing // 2623942
FIELD: electricity.SUBSTANCE: invention relates to the preparation of a dispersion-hardened composite by a method combining combustion in a self-propagating high-temperature synthesis (SHS) mode followed by high-temperature plastic deformation of synthesis products, and can be used to produce electrodes for electric spark alloying and electric arc surfacing. An exothermic mixture of the original components is used, consisting of 56 wt % of titanium, 14 wt % of carbon black, 23-29 wt % of cobalt and 1-7 wt % of tungsten.EFFECT: improving the performance of electrode material.2 cl, 1 tbl, 1 dwg
 
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