Casting and powder metallurgy (B22)

B22            Casting; powder metallurgy(28746)

ethod for producing high-coercivity magnets from alloys on basis of nd-fe-b // 2642508
FIELD: metallurgy.SUBSTANCE: invention can be used for production of high-energy permanent magnets based on rare-earth-alloys (rare earth metals), and alloys, in particular, based on neodymium, iron and boron (Nd-Fe-B alloy). The method for production of high-coercive magnets from Nd-Fe-B-based alloys includes crushing the base alloy, mixing the alloy and an additive for correction of alloy composition, pressing a mixture of powders in magnetic field, sintering the blank and cooling. The additive for correction of alloy composition is hydrides of rare-earth metals-Fe, and sintering of magnet is carried out in vacuum or at residual pressure for 1-2 h.EFFECT: invention makes it possible to increase coercive force and residual induction of produced magnets.2 cl, 2 dwg

Cooled multi-support guide groove roller // 2642235
FIELD: machine engineering.SUBSTANCE: invention relates to a cooled multi-support guide roller (1) for guiding a metal rod (S) in the continuous casting plant. The guide groove roller (1) comprises a collector beam (7) having cantilevers (10, 10a, 10b). Between each two consecutive cantilevers (10, 10a, 10b) there is at least one pipe (11) for cooling liquid for hydraulic connection of said cantilevers (10, 10a, 10b). Each external console (10a) comprises at least one first branch pipe (8) for internal cooling of the cooled guide groove roller (1) and at least one second branch pipe (9) for cooling hubs (4) of the bearings. The first branch pipe (8) is hydraulically connected to the channels (3) of the separate rollers (2 a, 2b). The second branch pipe (9) is hydraulically connected to the hubs (4) of the bearings via the cantilevers (10).EFFECT: improved strength and reliability.12 cl, 8 dwg

ethod for producing ceramic core for movable blade, ceramic core and movable blade // 2642228
FIELD: metallurgy.SUBSTANCE: ceramic core forming a cooling channel in the blade contains a lower part (1) forming a stem body, an upper part (2) forming a bath and a set of rods 3 which make it possible to hold the upper part and the lower part together. The rods are coated with material having ignition temperature below 1000°C, the rods are positioned in a casting mould, and the upper, and lower parts are cast by injection of ceramics. A single ceramic rod is sintered to form a space around each rod required for compensation of rod expansion which is 1%. Coating the surface part of each rod is carried out by application of varnish, deposition of wax layer or resin layer.EFFECT: cracking of rod during annealing is prevented.11 cl, 4 dwg

ethod for preparing metal iron nanoparticles // 2642220
FIELD: nanotechnology.SUBSTANCE: invention relates to the preparing of metal iron nanoparticles from aqueous sol based on ferrihydrite nanoparticles and can be used in medicine. Aqueous sol based on ferrihydrite nanoparticles obtained as a result of cultivation of Klebsiella oxytoca bacteria isolated from the sapropel of Lake Borovoe of the Krasnoyarsk Territory is treated in cavitation mode for 4-24 min on an apparatus of the Volna series UZTA-0.4/22-OM with ultrasonic treatment intensity >10 W/cm2 and a frequency of 22 kHz. The metal is reduced as a precipitate of metal nanoparticles of iron, which are then separated and dried.EFFECT: ferromagnetic iron nanoparticles have a volume-centred cubic package.2 dwg,1 tbl

Devices, systems and methods of three-dimensional printing // 2641945
FIELD: printing industry.SUBSTANCE: laser light source generates a coherent beam of visible light through stimulated Raman scattering. The substrate is in optical communication with said laser light source. Scanning module is placed after a laser light source and is made with scanning capabilities of coherent beam of visible light on the substrate according to the specified form of a three-dimensional object. The computer control system is operatively connected to the laser light source and the scanning module and is configured to control the scanning module and the power modulation of said laser light source to form said object in said substrate.EFFECT: creation of a high-power laser source of a visible high-brightness range to obtain improved resolution and print speed.48 cl, 7 dwg, 2 tbl

Device for alumothermal recovery of titanium from its tetrachloride // 2641941
FIELD: chemistry.SUBSTANCE: device contains a reactor closed with a lid at the top consisting of two parts as an upper cylindrical part with a workspace for the recovery of gaseous titanium tetrachloride with molten aluminium, atomized stream of inert gas, and a lower conical part for collecting and producing the recovery products in the form of powder of titanium and excess aluminium. The device is also equipped with nozzles for feeding molten aluminium and means of sputtering a gas stream, located at the top of the reactor and adopted to work in a synchronized pulse mode, a striker for crushing dispersed droplets of molten aluminium, placed near and below the nipple for the output of aluminium trichloride gas mixture, residual titanium tetrachloride and excess inert gas and placed at the bottom of the reactor for the introduction of gaseous titanium tetrachloride to the workspace, and a shut-off device for the release of titanium powder and excess aluminium from the reactor.EFFECT: ecological purity of production in the continuous or periodic mode of operation of the device.2 dwg
ixture for manufacturing moulds and cores in heated tooling // 2641938
FIELD: metallurgy.SUBSTANCE: mixture contains, wt %: carbamide-furan binder 1.5-2.2, acid hardening catalyst 0.3-0.7, boric acid 0.2-0.4, powdered hardening activator 0.4-0.6, the rest is refractory filler.EFFECT: increased strength of the mixture in hot state and increasing its viability.2 cl, 1 tbl

Device for measuring machine roll solution for continuous casting of billets // 2641936
FIELD: metallurgy.SUBSTANCE: device for measuring machine roll solution for continuous casting of billets contains a rod (3) with a fixed jaw (9) and magnets (6), two laser emitters (7) with an alternator line placed on a fixed sponge (9), and a web camera (4) connected to the interface (2) of USB 2.0 or USB 3.0 type with a tablet computer (1). The device is installed so that the rod contacts both rolls from the side, the fixed jaw is attached by the magnet to the bottom roll from the top, two laser emitters (7) are located on a projecting portion of the rod so that roller lines get in the field of web camera vision. The image from the web camera is analysed, and on the basis of this analysis, the distance between the rollers is calculated by the tablet computer (1).EFFECT: increased measurement rate due to eliminated dismantling of the machine for continuous casting of billets and increased measurement accuracy at low cost of the measuring device.1 dwg

Device for casting metal ingots // 2641935
FIELD: metallurgy.SUBSTANCE: device for casting metal ingots includes vertically oriented open-ended mould with direct cooling having an inlet opening and an outlet opening, a movable lower plate, a chamber surrounding the walls of the mould for placing primary cooling medium, a movable support for the lower plate, jet means for directed supply of first cooling liquid to the outer surface of a seed ingot, cleaning means for removal of the first cooling liquid, and nozzles. The nozzles are functionally connected to the cleaning means for supplying the second cooling liquid. The outlet openings for supplying the second cooling liquid in amount less than the amount of the first cooling liquid fed by jet means. The nozzles are inclined so as to provide heating restoration of the outer shell by at least 100°C between a first position and a second position.EFFECT: reduction of particle size after ingot hot rolling and reduction of macro segregation.15 cl, 38 dwg, 6 tbl
ethod of cleaning melt surface when growing germanium monocrystals // 2641760
FIELD: metallurgy.SUBSTANCE: essence of the invention consists in extraction of slags (oxide films) from the melt surface, and from crucible walls below the level of germanium melt in the crucible. The method consists in collecting the most part of all available oxide films on the melt surface and below melt level in the zone where it adjoins the crucible by sticking thereof to a preliminarily grown crystal. The result of efficient melt cleaning is achieved by adjusting the rotation speed of the crucible, crystal, the crucible position in a heat unit, as well as consumption of working gas (argon), wherein maximum high concentration of slag on the melt surface of crystal growth zone is achieved, and it facilitates their extraction on the preliminarily grown crystal. The preliminarily grown crystal is subjected to 2-5 cycles of sharp pulling with separation of the preliminary crystal from melt and then its subsequent complete immersion into the melt, which provides separation of slag impurities from the crucible below the melt level with subsequent floating thereof on the melt surface. Subsequent drawing up the preliminary crystal in each cycle provides collection of oxide films from the melt surface onto crystallisable surface of the ingot.EFFECT: yield of monocrystals with significantly lower dislocation density, reduced risk of twinning and polycrystallisation of the ingot during the growing process and reduced average time of the growth plant working cycle.2 cl, 2 ex
ethod for producing nanocrystalline powder of molybdenum oxycarbide // 2641737
FIELD: chemistry.SUBSTANCE: method of producing nanocrystalline powder of molybdenum oxycarbide includes evaporation of oxygen-containing compounds of molybdenum at a high temperature in an atmosphere containing an inert gas, followed by the condensation upon cooling. The powder of molybdenum trioxide is used as the oxygen-containing molybdenum compound, the evaporation is carried out in the presence of urea taken in the ratio of molybdenum trioxide: urea = 1:1, in terms of the plasma precondensation in the low-temperature nitrogen plasma at a temperature of 4000÷6000°C with the power of the plasma torch 2.4÷3.6 kWh at a flow rate of plasma 50÷55 m/s and a feed rate of powder of 150-200 g/h, and cooling is carried out in a stream of nitrogen, followed by the vortex cycloning and capture on the fabric filter.EFFECT: invention makes it possible to obtain molybdenum oxycarbide with a structure of the NaCl type without foreign impurities with a particle size of not more than 30 nm in an environmentally safe manner.2 ex, 2 dwg
ethod for producing porous products from quick-cooled powders of titanium and its alloys // 2641592
FIELD: metallurgical engineering.SUBSTANCE: method includes hydrogenation of powders, sintering in vacuum and cooling to room temperature. Hydrogenation of the powder is carried out in demountable or integral forms of steel or glass, corresponding to the shape of the article, at a temperature of 600-800 °C to a hydrogen concentration of 0.1-1% by weight, followed by vacuum annealing of the article at a temperature of 600-800 °C for 30-120 minutes, destroy or disassemble the moulds and sinter the resulting prepared semifinished product in a vacuum oven at a temperature of 900-1200 °C for 30-120 minutes.EFFECT: production of porous products without using heat-resistant high-temperature moulds for sintering is provided.3 ex
ethod of obtaining suspension on polymer basis with high-dispersed metal particles for manufacture of polymeric matrices filled with related particles // 2641591
FIELD: chemistry.SUBSTANCE: method comprises obtaining finely dispersed particles by spraying metal placed on a tungsten evaporator, then introducing the said particles into a polymer liquid by spraying with a gas stream and passing the said particles through a diaphragm above the liquid surface in a chamber in a gas medium with a controlled pressure, and mixing the introduced particles in a polymeric liquid, adjusting its pressure and temperature to obtain a slurry.EFFECT: obtaining a suspension with particles of controlled size from nanometre to atomic.1 dwg, 5 ex

ethod of producing quasispherical particles of titanium // 2641428
FIELD: chemistry.SUBSTANCE: method includes mechanical processing of titanium powder in a water-cooled planetary ball mill in an inert atmosphere of argon. A powder of pure titanium PTOM-2 is used. The powder is handled with activation of the surface of the powder particles when the balls are accelerated from 100 to 600 m/s2 for, at least, 5 minutes.EFFECT: production of quasispherical particles of titanium powder is ensured.3 dwg
ethod to strengthen surface of cast steel part // 2641209
FIELD: metallurgy.SUBSTANCE: method includes manufacture of a casting mould, preparation and application of strengthening composition, pouring the steel, cooling the steel with the mould. On the open surface of solidified casting, a reinforcing composition in the form of a powder is applied at 1250÷1300 °C in the form of a powder charge containing, wt %: boron carbide 75÷85, surfacing flux P-0.66 15÷25. Casts are shaken out after cooling to temperature 600÷700 °C.EFFECT: reduced duration of the strengthening process and improved quality of the part surface.2 dwg, 1 tbl
ethod for manufacturing ceramic moulds for equiaxial casting of heat-resistant alloys on molten models // 2641205
FIELD: metallurgy.SUBSTANCE: model block surfaces are cleaned from lubricants and contaminants by aqueous solution of detergents. A ceramic suspension based on silica sol is applied to the model block. Then it is filled with refractory granular material. The face layer is dried in air flow with moisture content of 45-55%. The cycles for application of ceramic suspension layer are repeated. Filling and drying each of them in dry air flow is carried out with 30-40% moisture content. Then model mass is burnt out and ceramic mould is subjected to heat treatment by calcination in temperature range from 700 to 850°C with following cooling in furnace for 8-12 hours. The moulds are removed from the furnace at the temperature not more than 100°C and cooled in air.EFFECT: improved quality of the casting ceramic moulds.3 cl, 1 tbl, 5 ex
ethod of producing bismuth ferrite nanopowder // 2641203
FIELD: chemistry.SUBSTANCE: invention relates to the production of a single-phase nanocrystalline bismuth ferrite powder BiFeO3 with ferromagnetic properties. The method comprises mixing bismuth nitrates Bi (NO3)3, iron nitrates Fe (NO3)3, glycerol, and water to form a solution, evaporating the resulting solution to form a gel and heating it to the flash point to form a powder. Mentioned bismuth nitrates and iron nitrates are used in the calculated amount required for obtaining bismuth ferrite, and glycine - in the amount of 35-50% less than the estimated amount. Evaporation of the resulting solution and heating to the temperature of the gel formed are performed at continuous mixing, and powder produced after flash is heated to 350-400°C over a period of time up to 30 min.EFFECT: obtaining a pure powder uniform in dispersion.8 dwg, 4 ex

Nanotubular materials crystallising in system of k2o-tio2-x-h2o (x=nio, mgo, al2o3, cr2o3, co2o3, fe2o3) and method of their synthesis // 2640766
FIELD: chemistry.SUBSTANCE: nanotubular materials crystallising in the system of K2O-TiO2-X-H2O (X=NiO, MgO, Al2O3, Cr2O3, CO2O3, Fe2O3) are characterized by the fact that in their composition up to 10% of ions Ti4+ is replaced by doping two- or trivalent metal. The method of synthesis of nanotubular materials is characterized by the fact that the synthesis of the samples is carried out by hydrothermal treatment of a pre-prepared mixture of hydroxide in KOH solution, to produce the initial mixtures of hydroxides, a solution of titanyl chloride synthesised by reaction of TiCl4 with chilled distilled water, is mixed with aqueous solutions of salts of finished elements in a predetermined ratio, and then the precipitation of hydroxides is produced by adding NH4OH to the aqueous solution mixture at pH=9-9.5 followed by washing with distilled water, drying at 70-90°C and mechanical crushing, then the crushed precipitate is mixed with 10 M KOH solution and subjected to a hydrothermal treatment at 170-180°C for, at least, 24 hours, after which the resulting product is washed with distilled water.EFFECT: invention makes it possible to synthesise potassium-titanate nanotubes with an average outer diameter of 5 to 12 nm.2 cl, 5 dwg, 2 ex
ethod of copper cementation from copper-containing solutions // 2640704
FIELD: chemistry.SUBSTANCE: method involves the reduction of copper from copper-containing solutions by iron shavings using an electromagnetic field, filtration, and washing. Copper-sulfate and copper-chloride solutions with a copper ion concentration of 50-300 g/dm3 are used as copper-containing solutions. Reduction of copper is carried out in an electromagnetic apparatus with magnetic elements moving from a magnetically hard material moving under the influence of an alternating magnetic field at a molar ratio of Fe:Cu=1:1, at a temperature of 25-40°C for 1 to 5 minutes to obtain a precipitate in the form of a copper powder.EFFECT: reduction of the consumption of reagents and the time of obtaining a metal powder with a high degree of dispersion.3 tbl, 3 ex
ixtures of moulding material containing barium sulphate // 2640686
FIELD: metallurgy.SUBSTANCE: moulding mixture comprises a refractory base, a liquid glass-based binder, barium sulphate and dustlike metal oxide.EFFECT: improved surface quality of the castings.20 cl, 2 tbl

Flux for continuous casting of low carbon steel // 2640429
FIELD: metallurgy.SUBSTANCE: casting flux has the following chemical composition, wt %: Na2O 5-10, MgO 3-10, MnO 3-10, B2O3 3-10, Al2O3≤6, Li2O <3, C 1-3, the rest us CaO, SiO2 and unavoidable impurities. The ratio of CaO/SiO2 is 0.8-1.3. Intensity of flux crystallization comprising 10-50% is determined by the fraction of crystals in the body cross-section of the solidified flux after melting of 50±2 g of the flux and the temperature at 1350±10°C and natural cooling in the steel crucible.EFFECT: introduction of boron-containing component into non-fluoride flux provides effective control of heat transfer from molten steel without negative effect of fluorides on human health.9 cl, 1 dwg, 1 tbl

ethod for producing carboborides of rare-earth metals // 2640121
FIELD: metallurgy.SUBSTANCE: initial blank is shaped as a stoichiometric powder charge of low hydride phase of metal, carbon and boron, after that the initial blank is annealed in vacuum at 1100°C for 10 minutes, the blank is cooled, ground and pressed into a rod, which is annealed at 1100°C for 10 minutes in vacuum, then the produced rod is cooled, ground and pressed into a rod, then it is subjected to arc remelting on a cooled copper hearth in argon atmosphere to produce a sample containing carboborides of rare-earth metals, after which the produced sample is heated in a vacuum up to 950°C and kept at such temperature for 12 hours with subsequent hardening of the sample in water.EFFECT: production of single-phase samples of carboborides of rare-earth elements is provided.2 dwg, 2 tbl, 1 ex
etal-ceramic composite and method of its production (versions) // 2640055
FIELD: metallurgy.SUBSTANCE: metal-ceramic composite comprises aluminium and a reinforcing additive, wherein the reinforcing additive comprises zirconium tungstate (ZrW2O8), with the following component ratio, wt %: ZrW2O8 0.1-10.0, aluminium - the rest. The method for producing a cermet composite includes the preparation of a powder mixture, the shaping and sintering of a billet. The powder mixture is prepared from aluminium powders and nanostructured zirconium tungstate (ZrW2O8) or hydroxo aqua zirconium tungstate (ZrW2O7(OH)2*2H2O), with the following component ratio, wt %: powder ZrW2O8 or ZrW2O7(OH)2*2H2O 0.1-10.0, aluminium powder is the rest, forming and sintering of the workpiece is carried out simultaneously in a single hot pressing cycle at a temperature of 600±25 °C in argon medium with isothermal exposure 10-20 minutes and subsequent rapid cooling to room temperature, and in the second variant, the moulding and sintering of the billet is carried out successively by first cold pressing and then sintering at 600±25 °C in a protective atmosphere with isothermal aging of 60-120 minutes.EFFECT: development of a metal-ceramic composite with high strength characteristics.7 cl, 4 ex

ethod and device to minimise possibility of explosions when casting with direct cooling of aluminium-lithium alloys // 2639901
FIELD: metallurgy.SUBSTANCE: metal is supplied to the mould and cooled by supplying liquid coolant to the solidifying metal in the casting pit. The casting pit has a top, middle, and bottom portions, and a movable slab. If a break of melt through of the ingot shell or its spreading is identified, the supply of metal into the casting mould, movement of the movable plate and coolant supply are stopped, the generated gas is pumped from the casting pit and inert gas is supplied to the casting pit which density is less than air density. In the event of a melt breakthrough, inert gas supply to the casting pit allows removal of water vapours and prevent explosion of hydrogen.EFFECT: improved safety of casting, while improving the quality of ingots.24 cl, 2 dwg
ethod of producing carbide powder // 2639797
FIELD: chemistry.SUBSTANCE: carbide powder is produced under isothermal conditions in an inert gas atmosphere in an alkali metal halide ion melt, into which a carbide-forming element compound, salt or complex salt thereof, and carbon powder are introduced. Pure powders of metal carbides are produced from the series including Ti, W, V, Ta, Zr, Cr, Mo, Al, Nd, or boron carbide or silicon, ranging in size from about 10 to a few hundred nm of the stoichiometric composition with a low content of trace gases.EFFECT: increased degree of purification.1 cl

Friction material composite for friction clutch of switch actuator // 2639427
FIELD: chemistry.SUBSTANCE: material contains 2-5.0 wt % of silicon oxide, 2-5 wt % of graphite, 10.5-17.5 wt % copper, 2.0-5.2 wt % barite and iron-rest. The material has an open porosity of 15-20%, is saturated with oil, Brinell hardness HB is not less than 600 Mpa, density - 5.45-5.85 g/cm3, the relative sediment not less than 12% and oil consumption - 1-4%. Iron material matrix has coarse-grained structure with a grain size of 10-180 mcm, not less than 70% of which is within 25-75 mcm, consists of granular perlite with inclusions of up to 20% of plate perlite and ferrite, has intercrystalline and intracrystalline porosity, grain boundaries distributed inclusions of graphite, silicon oxides, sulphides, copper and cementite as torn mesh and copper is distributed across the border inside the grains and beans.EFFECT: increasing of wear resistance of friction material and greater stability coefficient of friction when loading conditions change.8 dwg
ethod of producing zirconium tungstate powder // 2639244
FIELD: chemistry.SUBSTANCE: invention relates to the production of zirconium tungstate powder (ZrW2O8), which can be used to produce shut-off elements of the oil and gas complex. The method comprises mixing zirconium powders (ZrO2) and tungsten oxide (WO3) in the ration 1:2 by mechanical activation with an acceleration of grinding bodies of 30-60 g with the addition of a surfactant in the form of an aqueous solution of sodium chloride. After activation, the powder mixture is placed in a quartz tube and heated at 1200±25°C followed by quenching to room temperature.EFFECT: producing high-purity zirconium tungstate having a particle size of less than 2 mcm.5 cl, 5 ex

ethod of combined continuous casting, rolling and pressing of metal billet and device for its implementation // 2639203
FIELD: metallurgy.SUBSTANCE: device comprises a rotary crystalliser 3 forming a continuous cast billet 4, a roll 7 with a groove and a roll 8 with a projection forming a working caliber, a die 9 at the caliber outlet, a device 5 for controlling the temperature of the cast billet, guiding elements 6. The upper part of the roller 8 projection 14 has a t-shape, the projections 12 are made on the roll 7 cylindrical surface. There are slots 13 on the roll 8 cylindrical surface forming a labyrinth mating of rolls with projections 12. The die and die holder have mating slots and projections providing fixation of die position. The die is placed in the working caliber with gaps relative to roll surfaces. The billet from mould 3 with a present temperature is rolled in the working caliber and then pressed through a calibrated opening in the die. When the cast billet is fed into working caliber, the cast billet metal is pressed into gaps between the working surfaces of the rolls and the die to form a cladding layer of metal on the roll surface.EFFECT: reduced roll wear and losses of metal by self-sealing of the groove-projection interface.23 cl, 6 dwg, 3 tbl, 1 ex
Heat-insulating slag-forming mixture // 2639187
FIELD: metallurgy.SUBSTANCE: heat-insulating slag-forming mixture contains, wt %: ladle white slag produced by rail electric steel - 45-65 and organic additive - 35-55. Use of a mixture of husks of cereal crops - 50-60 and sawdust of hardwood species - 40-50 as organic additive results in an increase of the thickness of the layer of the heat-insulating mixture and formation of a liquid slag on the surface of the slag-forming material from the slag-forming material with a high heat-insulating capacity.EFFECT: reduction of rejects associated with temperature changes and solidification of steel in the ladle, reduction of heat losses during casting of steel and increase in the seriality of the cast steel.1 tbl

Device for casting of aluminium-lithium alloys // 2639185
FIELD: metallurgy.SUBSTANCE: device contains a casting pit, a casting table that is fitted with a casting mould with coolant tank, means for feeding coolant to solidification zone of cast alloy connected to coolant tank, a valve system containing at least one first valve and a second valve, a molten metal breakthrough detector, and a controller connected to the sensor and valves. Coolant is supplied through means for feeding coolant through the first valve, inert gas is supplied through the second valve. When breakthrough of molten metal is detected through ingot shell, inert gas is supplied to the coolant supply means and the first valve is shut off to stop coolant supply. In this case, the area at the top of the casting pit and around the mould will be filled with inert gas with displacement of coolant, prevention of gaseous hydrogen formation and exclusion of melt contact with coolant in this area.EFFECT: reduced probability of explosion in the area of melt break through the ingot shell.19 cl, 3 dwg
ethod of producing castings from iron aluminides // 2639164
FIELD: metallurgical engineering.SUBSTANCE: prepare the charge from aluminium and iron, melt and heat the melt above the liquidus line. The superheated melt is treated with salt K2ZrF6 in an amount of 0.5-1% of weight of the charge and poured into the mould. During the interaction of potassium hexafluorozirconate and aluminium, a restitution of zirconium is performed, that modifies the iron aluminides.EFFECT: increasing the mechanical properties of iron aluminides.1 ex

Device for mixing bulk materials // 2639163
FIELD: machine engineering.SUBSTANCE: device comprises a body, a rotating axis, a cylindrical working vessel mounted on bearings in the body, brackets with blades mounted on the axle, and discs. On one side of working vessel there is a loading device installed for loading bulk materials, and on the other side there is a device for unloading bulk materials. The discs are fixed inside the working vessel and divide it into chambers accommodating said brackets with blades. Each disc is provided with a central through hole and a rim and installed to form an annular gap between its rim and the inner surface of working vessel.EFFECT: possibility to adjust processing time at each stage of mixture preparation and reduce the energy consumption when mixing.19 cl, 14 dwg

Built-up press-mould // 2639162
FIELD: metallurgy.SUBSTANCE: built-up press-mould comprises a stationary block having a movable and a stationary part, and replaceable pack - a forming block consisting of a die, a punch, a plate of ejectors, and ejectors. The movable part is made of interconnected support plate, a fastening plate, a shank plate connected to the stem and mounted with for movement along the guide columns, and fastening strips. The fixed part consists of the fastening plate connected to the gate plate, on which the hold-down strips are fixed, and the columns connected to the fastening plate and the gate plate are installed.EFFECT: reduced number of stationary press moulds, simplified design and possibility for using changeable block-packs which makes it possible to increase the range of manufactured products and reduce costs for production of casting moulds.3 dwg

ethod for preparing metallurgical ladle // 2639109
FIELD: metallurgy.SUBSTANCE: steel-tapping channel (2) of the metallurgical ladle (1) is inspected, cleaned and containers (5) with starting mixture from are introduced from the bottom of the gate valve side. On the first container (5) a protective hose (6) is preliminary put, on the lower end of which a circular screen is fixed (7), and it is pushed together with protective hose into steel-tapping channel by subsequent containers (5) before the stop of the circular screen (7) into the end face surface of gate valve collector cup (3). The first container (5) is destroyed at the outlet from the protective hose to fill the steel-tapping channel with the starting mixture. The subsequent containers (5) are destroyed at the outlet from the starting mixture in the steel-tapping channel. After filling the steel-tapping channel with the starting mixture, the lower end of the last container (5) is fixed by the pusher in the lower plate channel of the gate valve, said channel is closed with gate valve plates by cutting the lower part of the protective hose, and the pusher is brought together with the residues of the protective hose.EFFECT: reducing the temperature losses of the ladle lining at reduced consumption of the starting mixture ensures a shorter preparation time for the ladle.2 cl, 3 dwg
Anti-stick coating for lost foam casting and method of preparation thereof // 2639101
FIELD: metallurgy.SUBSTANCE: coating has the following composition, wt %: aqueous solution of aluminium boron phosphate concentrate (40-50), powdery periclase (0.8-1.5) nano-structured diamond powder (0.3-0.8), wetting agent OP- 7 (0.1-0.3), white electrocorundum 25A M5 (20-30), white electrocorundum 25A M40 (the rest). These ingredients are mixed and sonicated for 60-90 s at an intensity of 10-15 kW/m2 and a frequency of 20-22 kHz with simultaneous bubbling at an air flow rate of 0.5-1.5 l/s⋅m2. The introduction of an alumino-boron phosphate binder and OP-7 provides an improvement of the wetting and coating ability of the coating. The introduction of nanostructured diamond powder makes it possible to obtain a fine-grained structure of the surface layer of castings.EFFECT: universality of the covering of polystyrene model by the type of alloy, configuration and overall dimensions of the castings.2 cl, 4 tbl, 3 ex

anipulator for replacing submersible bucket on slab machine for continuous casting of billets // 2639089
FIELD: metallurgy.SUBSTANCE: manipulator contains mechanisms for replacing and cleaning of spent submersible bucket. The kinematic circuit of replacement mechanism provides movement of replaceable submersible bucket along the given path to the teeming device of the intermediate ladle. The replacement of buckets without interruption of metal flow is carried out by a hydraulic cylinder mounted on manipulator platform. Cleaning of spent submersible bucket is carried out by the mechanism containing a hollow beam (25), two horizontal jaws (26, 27) mounted thereon, a gear wheel (29), gear-satellite (30) resting on the jaws and interacting with the gear wheel, a horizontal shaft (34) mounted on the bearing support and actuated by the hydraulic cylinder. The submersible bucket removal mechanism provides simultaneous translational and two rotary movements.EFFECT: increased yield of continuously casted billet due to shortened length of section which forms during the replacement of used submersible bucket at full mechanisation of the operation of quick replacement the submersible bucket.3 cl, 10 dwg
ethod of producing protective oxide film on metallic surface // 2638869
FIELD: chemistry.SUBSTANCE: method of producing a protective oxide film on a metal surface includes the preparation of a matrix made of an iron powder by mixing the iron powder with water in a ratio of 85:15 by weight to give a heterophasic wetted mechanical mixture, compaction of the mixture at a pressing pressure of 1.4…1.6 GPa due to localized shear strains with achievement of residual porosity 1…3% and passivation of the matrix with providing a protective oxide film.EFFECT: increased corrosion resistance of the matrix material of the product base.1 ex
ethod of producing high temperature powder composite material based on silicon carbides and titanium // 2638866
FIELD: chemistry.SUBSTANCE: invention relates to the production of a composite material based on silicon carbides and titanium, comprising the preparation of a powder mixture consisting of titanium, silicon carbide, and graphite, and mechanically activation of the powder mixture. The powder mixture contains 66 wt % Ti, 17 wt % SiC and 17 wt % C. The mechanical activation of the powder mixture is carried out in a planetary mill at a drum rotation frequency of 240-320 rpm in the irregular mode for 180 min, and then the plasma-spark sintering of the mechanically activated powder mixture is carried out in a vacuum at 1350-1450°C, a pressure of 15-30 MPa, an exposure of 5-8 min, followed by gradual cooling for 1 h.EFFECT: regulation of the phase content in the composite material is provided.1 ex

ethod of inoculation and alloying of cast metal articles when casting with gasifiable patterns // 2638722
FIELD: metallurgy.SUBSTANCE: method includes introduction of modifier and alloying additions into pre-expanded polystyrene granules, and sintering of gasifiable patterns therefrom. Modifiers and alloying additions in the form of micro-and nano-particles are ground and embedded inside pre-expanded polystyrene foam beads by acting on these particles by shock wave of electric discharge.EFFECT: more uniform distribution of modifiers and alloying additions in the gasifiable cast pattern is provided; and improved quality of inoculation and alloying of casting metal as a consequence.4 cl, 2 dwg, 4 ex
Slag-forming mixture for continuous steel casting // 2638721
FIELD: metallurgy.SUBSTANCE: mixture contains, wt %: amorphous graphite 10-20, lime 0.1-2, dust-like wastes of ferrosilicon production 30-40, dust-like wastes of aluminium production 20-30, ladle white slag of rail electric steel production 18-28.EFFECT: reduction of steel contamination by non-metallic inclusions and reduction of oxygen concentration in cast steel.1 tbl

ethod of producing silver hydrosol // 2638716
FIELD: chemistry.SUBSTANCE: method includes preparing an aqueous solution of a reducing agent in an aqueous solution of a stabiliser and introducing a reducing agent for metal salt to the solution. As a reducing agent, quercetin with a concentration of 1⋅10-3 up to 14⋅10-3 mole/liter is used in its deprotonated form at a molar ratio of quercetin with ammonia in the interval 1:3-1:10, while the oxidized form of quercetin acts as a stabiliser of nanoparticles. The concentration of the additional substance stabiliser varies from 1⋅10-3 up to 5 mol/liter, silver nitrate is used as metal salt. The concentration of silver nanoparticles in the resulting solution is from 500 ppm to 2500 ppm.EFFECT: decreasing the consumption of the stabiliser, toxic and aggressive chemicals are not used.3 cl, 4 dwg

Sideframe and bolster for railway trolley and manufacturing method thereof // 2638715
FIELD: metallurgy.SUBSTANCE: method for manufacturing a mould 500 for casting sideway of the railway car trolley includes formation of a lower 505 and an upper 510 mould halfs of a casting material to form an outer surface of the lower mould half portion and the upper half mould portion of the sideframe respectively. The mould includes a part 520 for casting sideframe horn plates. A rod assembly 545 may include a pair of rods of axle box, a bolster rod, a pair of inner jaw rods. The pouring gate system includes risers 535, feeders 540. The parts of the lower and upper halves of the mould are cured.EFFECT: method improvement.18 cl, 11 dwg
ethod of producing metallic granules with open porosity // 2638608
FIELD: chemistry.SUBSTANCE: method includes mixing a metal powder with water-soluble, metal-immiscible salt having a melting point higher than the melting point of metal. The resulting mixture is compressed to produce a compact sample in the form of a rod or a bar. The sample is heated, melted and dispersed by passing a short current pulse through the sample with a specified amplitude and duration. The resulting granules are placed after solidification into water to dissolve salt.EFFECT: producing granules of foam metal with open porosity.3 cl, 5 ex
ethod of production of shaped castings // 2638604
FIELD: metallurgy.SUBSTANCE: method involves alloy heating to a temperature exceeding the liquidus alloy temperature by 200-550°C, then the alloy is held at this temperature for 20-30 minutes, cooled down to a temperature not exceeding the alloy casting temperature, at a rate of at least 10 deg/s. The melt is mixed and poured into a mould. The melt is periodically mixed in at least 5-10 minutes during heating and high-temperature aging. When the alloy is cooled below the pouring temperature, it is reheated up to the pouring temperature. The liquid state time of the alloy after cooling before pouring into the mould does not exceed 20 minutes.EFFECT: increased density and mechanical properties of castings.2 cl, 6 tbl
ethod for producing powder of titanium carbonitride // 2638471
FIELD: chemistry.SUBSTANCE: method includes generating a thermal plasma stream in a plasma reactor with a limited jet stream, feeding titanium tetrachloride vapour, a gaseous hydrocarbon and nitrogen to the thermal plasma stream, ensuring their interaction, depositing the titanium carbonitride powder onto the walls of the reactor at a temperature in the range of 300-700°C and then deleting it.EFFECT: decreasing the content of chlorine impurities in the powder.1 ex

ethod for producing sputtering composite target containing heusler alloy phase of co2fesi // 2637845
FIELD: metallurgy.SUBSTANCE: method involves mechanical mixing of powders of Co2FeSi Heusler alloy components, sintering-pressing of produced mixture by means of electro-impulse plasma at 600°c and minimum pressure of 2.5 kN. Sintering is carried out by passing series of direct current pulses up to 5 kA with pulse duration 3.3 ms by filling powder mixture to produce a compact. After this, the produced compact is melted in quartz crucible of induction furnace at 1300°C for 3 hours till complete melting to produce a homogenised ingot. The produced ingot is crushed and ground to produce particles of 1-200 mcm size, and sintering-pressing of composite target is carried out by electro-impulse plasma sintering method with dilatometric shrinkage curve control.EFFECT: production of homogenised mechanically strong composite target of specified geometry containing Heusler alloy phase of stoichiometric composition.7 cl, 4 dwg

Device for producing powder aluminium oxide of high purity // 2637843
FIELD: chemistry.SUBSTANCE: device contains an electrolyser for the electrolysis of aqueous solutions with the oxidation of metallic aluminium, connected by the pipeline with the reverse osmotic installation to produce source industrial water, and receiving capacity for products of oxidation. In the lower opening of the receiving container, an outlet is provided connected to the upper screen of the wash cage. The bottom screen of the rinsing separator is connected by a product supply line to the aluminium oxidation product thermal treatment unit.EFFECT: increasing the safety of the device and reduce the content of the main impurity metals of water in aluminium oxide.5 cl, 1 dwg, 1 ex

ethod for activating aluminium nano-powder // 2637732
FIELD: metallurgy.SUBSTANCE: passivation of aluminium nano-powder with air containing water vapours, then, the passivated aluminium nano-powder is heated to 300-400°C in air atmosphere at a heating rate of 10 to 30°C/min and kept at this temperature for 30 minutes.EFFECT: increase of thermal oxidation effect.3 dwg, 1 tbl
ethod for producing al-ti modifying alloy // 2637545
FIELD: metallurgy.SUBSTANCE: method comprises interaction of porous lump titanium raw material with overheated aluminium melt, at that titanium sponge and/or briquetted titanium chips are used as porous lump titanium raw material, weight ratio of porous lump titanium material to aluminium is maintained within (0.38÷0.58):1, while level of overheated aluminium melt is maintained above the level of porous lump titanium raw material, at that method of self-propagating high-temperature synthesis is used to produce concentrated titanium-containing aluminium alloy with content of titanium of 27.5-36.7 wt %. Obtained titanium-containing alloy is cooled and ground up to content of fraction of minus 10 mcm not less than 95%, after that ground alloy particles are introduced into aluminium melt with the production of modifying alloy or applied to surface of aluminium wire or a strip with production of modifying ligature.EFFECT: production of aluminium-titanium alloy with particles of titanium aluminide uniformly distributed in the volume of the alloy.10 cl, 2 dwg, 2 tbl, 2 ex
ethod of producing large-scale castings of high-strength cast iron with spherical graphite // 2637459
FIELD: metallurgy.SUBSTANCE: spheroid sing modification is carried out simultaneously in several casting ladles: in a casting ladle mounted on a stand at a casting bowl, pouring metal from several intermediate ladles, in other ones- discharging metal from furnaces. The graphitising modification will be carried out simultaneously in casting bowls.EFFECT: reduction of modification time, reduction of fraction of spherical graphite inclusions of irregular and compact shape in the casting.2 dwg
 
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