etallurgy and ferrous or non-ferrous alloys and treatment of alloys or non-ferrous metals (C22)

C   Chemistry; metallurgy(318327)
C22            etallurgy; ferrous or non-ferrous alloys; treatment of alloys or non-ferrous metals(28213)

ethod of leaching wastes of enriched amorphous magnesite with solution of nitric acid // 2642577
FIELD: chemistry.SUBSTANCE: method of leaching the wastes of enriched amorphous magnesite with a solution of nitric acid is described, in which serpentinite-magnesite screening of fraction of 2 mm was ground in a vibratory mill for 0.5 h, the resulting powder in an amount of 10 kg was loaded through a metering hopper into the leaching reactor, where after addition of 40% of the solution of nitric acid in the ratio of 1/3 g/ml, mixing with ultrasound and heating to 90°C are carried out, the leaching reaction of serpentinite was carried out for 2 hours.EFFECT: increasing the leaching efficiency.1 dwg,1 ex

Dissolving stents containing magnesium alloys // 2642254
FIELD: pharmacology.SUBSTANCE: one of stent versions contains the following components in terms of the total mass of the alloy: 78.0-91.79 wt % of magnesium, 8.0-12.0 wt % of dysprosium, 0.01-5.0 wt % of neodymium and/or europium 0.1-3.0 wt % of zinc, 0.1-2.0 wt % of zirconium, at that this alloy contains no iron, and the stent is coated by polymers.EFFECT: group of inventions is characterized by favourable corrosion properties, desirable kinetics of resorption and mechanical properties suitable for obtaining stents.14 cl, 8 dwg, 5 tbl, 12 ex
ultilayer aluminium sheet for flux-free high temperature brazing in controlled atmosphere // 2642245
FIELD: metallurgy.SUBSTANCE: multi-layer sheet for flux-free high temperature brazing comprises an aluminium alloy core coated with intermediate layer of aluminium alloy, and solder of aluminium alloy applied on the intermediate layer. The core is made of 3XXX aluminium alloy containing, wt %: Mn<2.0, Cu≤1.2, Fe≤1.0, Si≤1.0, Ti≤0.2, Mg≤2.5, Zr, Cr, V and/or Sc in total ≤0.2, the rest is Al and unavoidable impurities. The intermediate layer is made of aluminium alloy containing, wt %: Mg 0.2-2.5, Mn <2.0, Cu≤1.2, Fe≤1.0, Si≤1.0, Ti≤0.2, Zn≤6, Sn≤0.1, In≤0.1, Zr, Cr, V and/or Sc in total ≤0.2, the rest is Al and unavoidable impurities. The solder is made of an aluminium alloy containing, wt %: Si 5-14, Mg<0.02, Bi 0.05-0.2, Fe≤0.8, Zn≤6, Sn≤0.1, In≤0.1, Cu≤0.3, Mn≤0.15, Sr≤0.05, the rest is Al and unavoidable impurities. The core material and the intermediate layer have higher melting point than the solder, and the intermediate layer is protective relative to the core. The total thickness of the cladding layer consisting of the intermediate layer and solder layer with respect to total sheet thickness is 3-30%. Soldering can be carried out in inert or reducing atmosphere without necessity of for applying the flux.EFFECT: possibility for soldering complex designs with corrosion potential.16 cl, 2 tbl
ethod of producing high-strength corrosion-resistant plaque steel // 2642242
FIELD: metallurgy.SUBSTANCE: method of producing high-strength corrosion-resistant plaque steel plates includes hot rolling at a temperature of not more than 1250°C with its end at temperatures above 880°C, coiling a strip at a temperature of 570-660°C. The basic layer is made of low-carbon steel, micro-alloyed by molybdenum and titanium, facilitating interphase nanosized carbide and carbonitride precipitations, and the cladding layer is made of corrosion-resistant austenitic steel, the composition of which satisfies the condition for CrEq/NiEq≤1.6. The chromium equivalent is CrEq=%Cr+1.37%Mo+1.5%Si+2%Nb+3%Ti, and the nickel equivalent is NiEq=% Ni+0.31%Mn+22%C+14.2%N+%Cu.EFFECT: provision of stable high values of strength, plasticity, cold resistance, corrosion resistance, continuity of layer interconnection and weldability.2 cl, 2 tbl, 2 ex

Aluminium bottle with neck thread produced by impact extrusion pressing, made of recycled aluminium and reinforced alloys // 2642231
FIELD: metallurgy.SUBSTANCE: production method of impact extrusion pressing of metal bottle with thread for beverages includes production aluminium alloy blanks mixed from scrap aluminium alloy and relatively clean aluminium alloy. Said aluminium alloy scrap contains: between about 0.20 wt % and about 0.32 wt % Si, between about 0.47 wt % and about 0.59 wt % Fe, between about 0.10 wt % and about 0.22 wt % Cu, between about 0.78 wt % and about 0.90 wt % Mn, between about 0.54 wt % and about 0.66 wt % Mg, between about 0.06 wt % and about 0.18 wt % Zn, between about 0.00 wt % and about 0.08 wt % Cr, between about 0.00 wt % and about 0.08 wt % Ti, deforming said blank into a preferred shape by the method of pressing - by impact extrusion to form said metal bottle and forming a thread on the neck portion of said metal bottle. Said thread is configured to receive a threaded cover which can optionally be opened and closed after filling the metal bottle with beverage.EFFECT: producing the bottle blank with strength characteristics sufficient to enable threading on the bottle neck designed to be screwed onto such threaded neck of the threaded cover.21 cl, 12 tbl, 13 dwg
Cast iron // 2642226
FIELD: metallurgy.SUBSTANCE: invention relates to the field of ferrous metallurgy, particularly to cast iron compositions, which can be used in machine building. Cast iron contains, by mass %: carbon 3.0–3.5; silicon 2.0–2.5; manganese 1.3–1.5; titanium 0.06–0.12; aluminum 0.2–0.3; copper is 1.3–1.5; phosphorus 0.1–0.15; calcium 0.001–0.002; REM 0.2–0.25; niobium 0.3–0.5; chrome 0.3–0.5; nitrogen 0.0005–0.001; molybdenum 0.3–0.5; vanadium 1.3–1.5; boron 0.05–0.1; iron – the rest.EFFECT: technical result is high heat resistance.1 cl, 1 tbl
Cast iron // 2642225
FIELD: metallurgy.SUBSTANCE: invention relates to the field of ferrous metallurgy, particularly to cast iron compositions, which can be used in machine building. Cast iron contains, mass %: carbon 2.2–2.7; silicon 0.9–1.7; manganese 0.7–0.9; copper 0.25–0.35; yttrium 0.03–0.04; praseodymium 0.09–0.13; nickel 1.3–1.7; tungsten 0.15–0.2; tellurium 0.0008–0.0012; iron – the rest.EFFECT: technical result is increasing of cast iron durability.1 cl, 1 tbl
Cast iron // 2642223
FIELD: metallurgy.SUBSTANCE: invention relates to the field of ferrous metallurgy, particularly to cast iron compositions, which can be used in machine building. Cast iron contains, mass %: carbon 2.8–3.2; silicon 0.8–1.2; manganese 0.2–0.4; chromium 0.14–0.2; titanium: 0.1–0.2; nickel 1.2–1.6; copper 1.8–2.2; phosphorus 0.08–0.12; boron 0.04–0.08; vanadium 0.14–0.2; calcium 0.001–0.0012; aluminum 0.08–0.12; niobium 0.15–0.25; molybdenum 0.8–1.2; iron – the rest.EFFECT: technical result is increasing of cast iron durability.1 cl, 1 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
ethod for treatment of single crystals of ferromagnetic conial alloy with content of ni 33 -35 at% and al 29 -30 at% // 2641598
FIELD: metallurgy.SUBSTANCE: method for treatment of single crystal of ferro-magnetic CoNiAl alloy with Ni content 33 -35 at % Al 29 -30 at % for introducing the two-way shape memory effect includes annealing of samples at +1330C÷1340°C for 8.5 hours in inert gas atmosphere followed by quenching in water and thermomechanical treatment. The thermomechanical treatment is carried out per heating/cooling cycle involving heating in free state of single crystal in the form of parallelepiped placed in the grippers of the test machine in planes (001)B2, (110)B2, up to 275°C, applying compressive load of 500 MPa along the crystallographic direction cooling under load to the temperature of 0÷-50°C until completion of thermoelastic B2-L10 martensitic transformation, heating to the temperature of 125°C for 1 hour in martensitic state and further heating to the temperature of 275°C to complete reverse martensitic transformation L10-B2 The load is then removed and cooled to room temperature. The heating/cooling rate during thermomechanical treatment is 5-7°C/min.EFFECT: high cyclic stability of the two-sided shape memory effect when thermocycling in free state at room temperature.1 tbl

ethod for obtaining highly porous osteo-integrating coating on implants from titanium alloys // 2641594
FIELD: metallurgy.SUBSTANCE: method comprises thermodiffusion hydrogen saturation of the implant and vacuum annealing. Before thermodiffusion hydrogen saturation and vacuum annealing, a porous coating is applied on the surface of the implant by diffusion welding with the help of welding of titanium alloy fibres at a temperature of 850-950°C to the surface of the implant from titanium alloys, hydrogen saturation is carried out at a temperature of 600-650°C to a hydrogen concentration of 0.5-0.8 wt %, and the subsequent vacuum annealing - to a hydrogen concentration of not more than 0.008 wt %.EFFECT: shearing force of the coating is increased from the monolithic substrate while maintaining its structure and properties.4 cl, 1 dwg, 1 tbl, 8 ex
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
Expanding cone and method of its production // 2641437
FIELD: metallurgy.SUBSTANCE: cone is made of hypereutectoid steel, which composition includes the following elements, wt %: C: 2.2 to 2.4, Si: 1.8 to 2.0, Mn: 1 to 1.5, Cr: 0.5 to 0.8, Ni: 0.8 to 1.2, Mo: 0.35 to 0.5, V: ≤0.15, Cu: 0.2 to 0.3, S: ≤0.025, P: ≤0.025, the rest is Fe.EFFECT: required frictional resistance, wear resistance, good automatic lubrication ability, and long service life are provided.3 cl

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 for manufacturing sheets from ot4 titanium alloy // 2641214
FIELD: metallurgy.SUBSTANCE: method for manufacturing sheets from OT4 titanium alloy includes deformation of ingot into a slab, mechanical treatment of the slab, multi-stage rolling of slab on the rolling stock, cutting of the rolled stock into sheet blanks, their assembly into a pack, rolling of the sheet blanks into sheets in the composition of the stack and the finishing operations of sheets after the pack rolling. The ingot is deformed into slab in two stages. At the first stage in βregion the temperature range above the temperature of polymorphic transformation (TPT) by 150-250°C with total deformation degree 30-80%, and at the second stage (α+β)-region within the temperature range below the TPT by 30-50°C with total deformation degree of 20-50%, multi-stage slab rolling is carried out sequentially in four stages. At the first stage in βregion within the temperature range above the TPT by 90-160°C with total deformation degree of 30-90%, at the second stage (α+β) region within the temperature range below the TPT by 30-70°C with total deformation degree of 15-40%, at the third stage in βregion within the temperature range above the TPT by 90-160°C with total deformation degree of 15-25% and at the fourth stage (α+β) region within the temperature range below the TPT by 30-70°C with total deformation degree of 40-70%, the stock is cut into sheet blanks and they are assembled into a pack, sheet blank is laid to provide perpendicularity of the previous rolling of sheet blank to the direction of subsequent rolling of sheet blank, and the pack is rolled for ready size within the range of temperatures below TPT by 30-70°C with total deformation degree of 40-70%.EFFECT: produced sheets have high plasticity values, low anisotropy of mechanical properties.5 dwg, 3 tbl
ethod for forming fine-grained high-strength and corrosion-resistant structure of aluminium alloy // 2641212
FIELD: metallurgy.SUBSTANCE: invention relates to the technology of intensive deformation treatment of AMg 6 aluminium alloy and can be used in production of deformed semi-finished products and light-weight products therefrom for using in aerospace, shipbuilding and automotive industries. Method for producing the blank from a high-strength and corrosion resistant AMg6 aluminium alloy includes casting the alloy and thermomechanical treatment of the casting. Thermomechanical treatment of the casting is carried out by multi-equal channel angular pressing (ECAP) at deformation rate of 0.4 mm/s in two stages with production of a blank, at the first stage one ECAP cycle is carried out at the temperature of 145-150°C. At the second stage, the second EACP cycle and subsequent ECAP are carried out at the temperature of 165-240°C with stepped temperature increase in each cycle till total true degree of deformation e=2.8 and average grain size 0.3-0.5 mcm is reached. The second stage is carried out with holding the blanks for 5-10 minutes before each cycle directly in the working channel of the ECAP unit at the temperature of each ECAP cycle.EFFECT: upgraded strength and corrosion resistance.3 cl, 1 dwg, 1 tbl, 2 ex
ethod of forming high-strength and corrosion-resistant structure of aluminium-magnesium alloy // 2641211
FIELD: metallurgy.SUBSTANCE: invention relates to technology of thermomechanical treatment of aluminium alloy with magnesium content not more than 6 wt % for producing deformed semi-finished products and light-weight products therefrom for using in aerospace, shipbuilding and automobile industries. Method for producing billets from high-strength and corrosion-resistant aluminium-magnesium alloy with magnesium content not more than 6 wt % includes casting of alloy and thermomechanical treatment of castings with production of billets. Thermomechanical treatment of castings is carried out by rolling at 0.4 mm/s rate at room temperature to achieve total true degree of deformation e=1.3 in the produced billets, and then by annealing at 300-325°C for 30 minutes to form billets of homogeneous structure with average grain size 0.4-0.5 mcm.EFFECT: enhanced strength and corrosion resistance.3 cl, 2 ex
ethod for producing blank of ti49,3ni50,7 nanostructured alloy with shape memory effect // 2641207
FIELD: metallurgy.SUBSTANCE: method for producing a blank of Ti49, 3Ni50, 7 nanostructured alloy with shape memory effect includes uniform angular pressing with accumulated degree of deformation more than 4 in the temperature range 300-550°C, plastic deformation and annealing. The blank produced after ECAP is enclosed in steel shell, and plastic deformation is carried out by free upsetting to degree of not less than 30% in temperature range of 20-300°C, then the blank is removed from the shell, and annealing is carried out at temperature T = 200-400°C.EFFECT: enhanced mechanical properties and functional characteristics with the necessary cross-section of blanks.1 tbl, 2 ex
ethod for producing alloyed cast iron for wear-resistant parts // 2641204
FIELD: metallurgy.SUBSTANCE: metal melt with content of Ni≥1.0% is produced in furnace and overheated by its DC electric arc up to 1480-1580 °C, slag is tapped and aluminium is introduced onto the metal melt mirror in amount 0.5÷3.5 wt % of liquid metal in furnace for electrolytic deoxidation of melt, heat is kept for 1-7 min, melt crystallization is carried out by intensive cooling at 60-100 °C/min rate to temperature, which is within 100 °C range below and above the resistance temperature of pearlite, then the casting is removed from the mould and cooled to room temperature at 30-60 °C/h rate and the working surface of the casting is machined and then subjected to heat treatment by high-frequency currents.EFFECT: invention makes it possible to produce cast iron with high crack resistance and operational characteristics.1 tbl

ethods of decreasing immune content in magnesium, purified magnesium and producing metallic zirconium // 2641201
FIELD: chemistry.SUBSTANCE: method of producing magnesium purified from impurities comprises: combining a zirconium-containing material with the molten magnesium with a low content of impurities containing not more than 1.0 wt % of total impurities in a vessel to form a mixture. The mixture is then kept in a molten state for a time sufficient to allow at least a portion of the zirconium-containing material to react with at least a portion of the impurities to form intermetallic compounds. Then magnesium is separated from intermetallic compounds for the production of purified magnesium, which contains more than 1000 ppm of zirconium, and a reduced level of impurities in addition to zirconium compared to magnesium with a low content of impurities. Purified magnesium containing at least 1000 ppm of zirconium, and methods for producing metallic zirconium using a magnesium reducing agent are also disclosed.EFFECT: possibility of applying the said magnesium as a reducing agent.60 cl, 3 dwg, 5 tbl
ethod for obtaining isotope variety of elementary germanium with high isotope and chemical purity // 2641126
FIELD: chemistry.SUBSTANCE: invention relates to the development of the method of obtaining isotope-enriched germanium, which can be used in microelectronics, infrared optics, nanophotonics, fundamental physical research. The source material for the production of monoisotopic 72Ge, 73Ge, 74Ge, 76Ge is monogermane enriched with one isotope germanium obtained in the enriched condition by the consistent separation in a centrifuge separation of monogermane with a natural isotopic composition. Germanium is isolated by monogermane pyrolysis at a temperature of 350-450°C and a pressure of 1050-1100 mbar. It is carried out in a quartz tube reactor, the inner walls of which are covered with a layer of pyrolytic carbon. After precipitation of polycrystalline germanium, it is fused directly into the reactor in a compact ingot.EFFECT: obtaining isotopes of germanium with a high degree of isotopic and chemical purity with a high yield of the product.3 cl, 4 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
agnesium alloy, method of its manufacture and use // 2640700
FIELD: metallurgy.SUBSTANCE: biodegradable implant contains magnesium alloy comprising: Zn in amount from 3 to 5 wt %, Ca in amount from 0.2 to 0.4 wt %, the rest is represented by magnesium containing impurities facilitating electrochemical differences of potential and/or formation of intermetallic phases, in total amount not exceeding 0.0048 wt %. The total amount of impurities contains: separate impurities from the group of Fe, Si, Mn, Co, Ni, Cu, Al, Zr, and P in amount not exceeding 0.0038 wt %. The Zr content is less than 0.0003 wt %, and alloying elements selected from the group of rare earth elements having atomic numbers 21, 39, from 57 to 71 and from 89 to 103, in amount not exceeding 0.001 wt %. The alloy contains the intermetallic phase of Ca2Mg6Zn3 and, optionally, isolated phase of MgZn, each of which is characterized by volume content close to up to 2%, dispersed at grain boundaries with size <5 mcm.EFFECT: biodegradable implant is in stable electrochemical condition with low porosity and high corrosion resistance over a long period of time due to high values of ultimate strength and yield point, and reduced value of mechanical asymmetry.30 cl, 1 ex

aterial of spark plug electrode and spark plug // 2640699
FIELD: metallurgy.SUBSTANCE: spark plug electrode material is a nickel-based alloy containing silicon in amount from 0.7 to 1.3 wt %, copper in amount from 0.5 to 1.0 wt % and nickel in amount from 97.5 to 98.5 wt % and having on a portion of its surface at least a layer of nickel oxide formed in oxidizing atmosphere from nickel oxide grains, which grain boundary phase contains silicon and/or its oxide in amount from 1 to 5 wt % based on total weight of oxide layer.EFFECT: material is characterized by low electro erosion wear, high corrosion resistance, thermodynamic and mechanical stability.18 cl, 4 dwg
ethod of producing uranium concentrate from nitrate-sulfate solutions // 2640697
FIELD: chemistry.SUBSTANCE: method of producing uranium concentrates from nitrate-sulfate strippant resulting from desorption of uranium from saturated anion exchange acidified by the solutions of ammonium nitrate, is the deposition of the concentrate by one-stage neutralisation treatment of strippant with ammonia at a constant pH value of 6.7 to 7.5. The supply of ammonia and strippant is carried out simultaneously and continuously in a reactor with a previously prepared aqueous ammonia solution with a predetermined pH of 6.7-7.5.EFFECT: decreasing the amount of sulfur in the uranium concentrate to values meeting the requirements of international standard ASTM C 967-08, and a reduction in the number of technological operations.4 tbl, 4 ex

Nickel-cobalt alloy // 2640695
FIELD: metallurgy.SUBSTANCE: invention relates to nickel-cobalt alloys. Ni-Co alloy contains, wt %: Fe from >0 to maximum 10, Co from >12 to <35, Cr from 13 to 23, Mo from 1 to 6, Nb + Ta from 4.7 to 5.7, Al from >0 to <3, Ti from >0 to <2, C from >0 to maximum 0.1, P from >0 to maximum 0.03, Mg from >0 to maximum 0.01, B from >0 to maximum 0.02, Zr from >0 to maximum 0.1, the rest is Ni, if necessary: V to 4, W from 4, possibly, impurity elements: Cu maximum 0.5, S maximum 0.015, Mn maximum 1.0, Si maximum 1.0, Ca maximum 0.01, N maximum 0.03, O maximum 0.02. Dissolution temperature γ' is 900-1030°C at 3 at. % ≤ Al + Ti ≤ 5.6 at % and 11.5 at % ≤ Co ≤ 35 at %, stable microstructure after dispersion hardening at 800°C for 500 h and the ratio of aluminium and titanium contents in at% Al/Ti ≥ 5.EFFECT: alloy is characterized by high mechanical properties, good formability and stable microstructure.13 cl, 7 dwg, 8 tbl
ethod of manufacture of cold drawn trade pipes of 273×10×8700-9500 mm size from titanium alloys pt-1m and pt-7m // 2640694
FIELD: metallurgy.SUBSTANCE: method of manufacture of cold drawn trade pipes of 273×10×8700-9500 mm size from titanium alloys PT-1M and PT-7M includes ingot casting in vacuum-arc furnaces, forging ingots in forgings, turning forgings into blanks with size of 500±5×1750±25 mm, drilling in the blanks a central hole with a diameter of 90±5 mm, schooping Al2O3, heating in reheat furnaces in mufflers up to temperature of 1140-1160°C, piercing the blanks of 500±5×90±5×1750±25 mm size in a cross-rolling mill on a mandrel with 300 mm diameter with an elongation ratio μ from 1.39 to 1.46 in shells with a size of 515×in.315×2400-2590 mm, rolling shells in a pilgrim mill in the calibre of 351 mm with an elongation ratio of μ=4.78, with charging shells to the deformation zone m=18-20 mm, to tube stock with a size of 338×28×10300-11200 mm, cutting the tube stock into two pipes of equal length, boring and machining of hot drawn tube stock to tubular blanks with a size of 325×15×5150-5600 mm, rolling them in cold reducing rolling mills end route 325×15×5150-5600-273×10×8700-9500 mm with a relative reduction along the wall of δm=33.3% and an elongation ratio of μm=1.77.EFFECT: mastering the production of a new type of pipes made of titanium alloys.1 tbl
anufacture method of steel sheet for pipes with increased deformation capacity // 2640685
FIELD: metallurgical engineering.SUBSTANCE: steel sheet 15-40 mm in thickness with a yield strength of more than 480 MPa, used in the production of electrically welded pipes, a slab of steel containing, wt %: carbon 0.04-0.08, silicon 0.10-0.30, manganese 1.60-1.85, chromium no more than 0.30, nickel 0.20-0.40, molybdenum 0.10- 0.25, copper not more than 0.30, aluminium not more than 0.05, niobium 0.03-0.06, titanium 0.010-0.020, vanadium not more than 0.01, sulfur no more than 0.003, phosphorus not more than 0.013, iron and the inevitable impurities - the rest, are heated to 1100-1200°C, are subjected to rough rolling at 950÷1050°C, then finishing rolling at 700÷820°C with a total reduction of 75÷85%, after which the resulting sheet is cooled at a rate of 20÷35°S/s to 300÷500°C, and then in air to a temperature of not more than 150°C. The sheet has a microstructure consisting of bainite, polygonal ferrite, and also "second phases" in the form of a martensite-austenite component and degenerate perlite.EFFECT: increased deformation capacity of steel sheet.2 tbl
ethod of vacuum refining of tin from lead // 2640480
FIELD: metallurgy.SUBSTANCE: method involves dosing the original tin into a boiler along with pouring in a vacuum chamber onto an evaporation plate, heated by an electric heater, evaporation and condensation of lead vapours on screens and its removal to the receiving condensate bath, draining the purified tin from the evaporation plates and its discharging to the receiving tin bath, while the initial tin boiler a lead concentration potential is measured by submersing an electrode with a lead-containing electrolyte in the tin and, when the potential deviates from the previous value, they decrease or increase the flow of the initial tin, dosed into the vacuum chamber, using a regulator, and a tin concentration potential is measured in the condensate bath by submersing an electrode with a tin-containing electrolyte and, when the potential deviates from the specified value, they increase or decrease the consumption of power for heating evaporation plates by a regulator. As an electrode for measuring the lead concentration potential in the initial tin boiler, a quartz fabric is used in two layers with a gap, in which a lead-containing electrolyte is poured to impregnate the fabric, and which contains, wt ±1%: KCl - 42; NaCl - 7; PbCl2 - 27; ZnCl2 - the rest. As an electrode for measuring the tin concentration potential of the condensate bath, they use a quartz fabric in two layers with a gap for the impregnation of the fabric with tin-containing electrolyte which includes: wt ±1%: KCl - 46; NaCl-8; SnCl2 - 17; ZnCl2 - the rest. The electrode, submersed in the melt for measuring the lead and tin concentration potential, is made of quartz fabric in two layers with a gap, which is filled with electrolyte for impregnation of the fabric and a contact metal plate is inserted therein.EFFECT: lowering the yield of off-spec tin and condensate and reducing the consumption of power.6 cl, 3 dwg
ethod of extracting rare earth metals from wet-process phosphoric acid when processing apatite concentrates // 2640479
FIELD: chemistry.SUBSTANCE: rare earth metals are ejected by extraction using an extractant of di-2-ethylhexylphosphoric acid (D2EHPK) with a gradual separation of the REM into three lanthanide concentrates containing heavy, containing Yb, Er, Y, Dy, Ho, Tb, an average containing Gd, Eu, Sm, and light, containing Nd, Pr, Ce, La. D2EHPK is used with a concentration for the heavy group - 0.54M, for the medium - 1.35M and for the light group - 2.8M. The extraction process is carried out at a ratio of the aqueous and organic phases of 2-4, the contact time of the phases is not more than 2 minutes, with a constant stirring speed of 900 rpm and a temperature of 298 K. Obtained extracts are directed to the backwash for the impurity ions of Fe 3+ organic phase solutions of sulfuric acid concentration from 20 to 40% obtaining rare earth metals concentrates on three mentioned groups. The degree of extraction by Yb, Er, Y, Dy, But, Nd, Pr, Ce is not less than 99%, for Gd, La is not less than 90% and for Eu, Sm, Tb not less than 75%.EFFECT: increased degree of uranium extraction.3 dwg, 3 tbl, 3 ex
aster alloy for refining and modifying chromium cast irons // 2640368
FIELD: metallurgy.SUBSTANCE: master alloy contains, wt %: titanium 8-12; silicon 8-12; aluminium 4.5-5.5; boron 2.8-3.5; carbon 1.0-1.2; vanadium 8-12; cerium 1.8-2.2; manganese 10-12; samarium 10-12; nickel 28-32; calcium 0.5-1.5; the rest is iron.EFFECT: invention makes it possible to create master alloy for chromium cast irons with increased radiation resistance and stability of strength characteristics under exposure to radioactive hydroabrasive mixtures.1 tbl
White wear-resistant cast iron // 2640367
FIELD: metallurgy.SUBSTANCE: white wear-resistant cast iron contains, wt %: carbon 2.6-3.0; silicon 0.3-0.7; manganese 0.5-0.9; chromium 26.0-30.0; nickel 0.6-1.6; tungsten 0.01-0.05; molybdenum 0.01-0.05; titanium 0.02-0.10; vanadium 0.02-0.20; aluminium 0.06-0.10; boron 0.002-0.02; niobium 0.06-0.50; samarium 0.50-1.50; cerium 0.008-0.06; the rest is iron.EFFECT: creating white wear-resistant cast iron with improved resistance to radiation and abrasive action of hydromixtures of radioactive ores and mineral raw materials.1 tbl

Separating cup for pumps with magnetic coupling, as well as manufacturing method // 2640306
FIELD: engine devices and pumps.SUBSTANCE: gap should be as narrow as possible in order to provide good pump efficiency which can be realised only with a thin sidewall of the cup. In this case, the cup must have a significantly high strength, in particular, to withstand the pressure differences in the pump, and at the same time it can be produced in a simple manner by a given geometry and has a high stability of a shape. It is proposed to make the separation cup (1) with the side wall (3) which is at least partially composed of material containing a nickel component. This material is a nickel-chromium alloy which contains at least 50 weight percent of nickel and from 17 to 21 weight percent of chromium, and perform hardening the side wall (3) by heat treatment.EFFECT: possibility to create the separation cup that is highly resistant to corrosion or high temperatures.11 cl, 3 dwg
ethod of removing noble metals from solutions // 2640212
FIELD: chemistry.SUBSTANCE: deposition of noble metals is improved by a combination of electroextraction and cementation processes. At the same time, the cathode potential at the electroextraction stage should be negative - 0.6 V relative to the normal hydrogen equivalent in order to ensure the chemical stability of the precipitating material and at the same time to guarantee the cathodic deposition of noble metals.EFFECT: deposition rate, the degree of extraction, and the content of the final product are increased in comparison with the known methods.2 cl, 2 tbl, 1 ex
Cobalt-based wear-resistant alloy // 2640118
FIELD: metallurgy.SUBSTANCE: invention can be used to repair and strengthen wind turbine blades of aircraft gas turbine engines with working temperature at least 1000°C. The cobalt based alloy contains, wt %: chromium 22-27, tungsten 7-10, nickel 5-12, carbon 1-1.8, silicon 0.1-1, titanium 1-2, at least one rare earth metal from the group comprising cerium, lanthanum and yttrium, 0.01-0.2; zirconium or hafnium, 1-2; the rest is cobalt.EFFECT: alloy is characterized by high working temperature, low friction coefficient, low wear rate and linear wear at working temperatures.2 tbl, 5 ex
ethod for increasing density of complex-profile articles from intermetallide alloys based on nickel produced by additive technologies // 2640117
FIELD: metallurgy.SUBSTANCE: method for treating a nickel-based intermetallic alloy product produced by selective laser fusion includes hot isostatic pressing and subsequent cooling. Before hot isostatic pressing, the article is subjected to heat-vacuum treatment at the temperature of 20-30°C below the melting point of the article alloy for at least 6 hours, hot isostatic pressing is carried out at the temperature 15-25°C below the melting temperature of product alloy for at least 3 hours under pressure 170-200 MPa, and subsequent cooling is carried out up to the temperature by 500-550°C below the melting temperature of the product alloy at a rate not more than 8°C/min. The amount and size of the pores are reduced.EFFECT: improved performance and service characteristics of complex-profile products, increased density of complex-profile parts of gas turbine engines.2 tbl, 3 ex
Alloy // 2640107
FIELD: metallurgy.SUBSTANCE: alloy contains, wt %: sodium 4.0-6.0; potassium 25.0-30.0; cesium 25.0-30.0; gallium 39.0-41.0.EFFECT: formation of aerosols in production of the alloy is reduced.1 tbl
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
Deformable thermally refractory aluminium-based alloy // 2639903
FIELD: metallurgy.SUBSTANCE: deformable thermally refractory aluminium-based alloy contains, wt %: magnesium 5.3-6.3; manganese 0.3-0.6; zirconium 0.11-0.16; beryllium 0.0001-0.005; acandium 0.11-0.16; titanium 0.01-0.03; iron 0.06-0.18; the rest is aluminium and unavoidable impurities, including silicon not more than 0.1, zinc not more than 0.06 and copper not more than 0.06, with a total content of not more than 0.18, the ratio of zirconium content to scandium content is 0.9 to 1.1, and the ratio of iron to silicon content is equal to or greater than one.EFFECT: increase the strength and plasticity of the alloy.1 ex, 2 tbl
ethod of producing low-alloyed corrosion-resistant steel for producing rolled stock // 2639754
FIELD: metallurgy.SUBSTANCE: invention relates to the production of rolled stock of low-alloyed stainless steels for bridge construction, unpainted structural contact network of electrified railways, viaduct roads and other structures. The method includes steel smelting in a steelmaking unit, steel production in a steel ladle, alloying, out-of-furnace processing and casting of steel, austenization. Steel with the following chemical composition is obtained, wt %: carbon 0.08-0.25, manganese 0.5-1.3, silicon 0.05-0.8, chrome 0.3-1.3, nickel 0.2-1.0, copper 0.2-1.0, aluminium 0.01-0.09, sulphur not more than 0.02, phosphorus not more than 0.02, nitrogen not more than 0.012, one or more components selected from the group: molybdenum 0.0005-0.05, vanadium 0.0005-0.05, niobium 0.0005-0.05, zirconium 0.0001-0.015, iron and unavoidable impurities - the rest. Release of steel from the steelmaking unit into the steel ladle is carried out for 3-8 minutes, and the steel is cast at a temperature of 1505-1560°C with a rate of 0.4-6 m/min.EFFECT: invention allows to expand the scope of proposed steel grade with ensuring its high resistance to atmospheric corrosion, improve the quality and mechanical properties of rolled products.9 cl, 2 ex, 2 tbl

ethods, systems and device for cyclotron production of technetium-99 m // 2639752
FIELD: metallurgy.SUBSTANCE: method includes the stages of (i) irradiation in predominantly oxygen-free medium of cured coated metal Mo-100-target plate with protons emitted by the cyclotron, (ii) dissolving molybdenum ions and technetium ions from irradiated target plate in H2O2 (iv) adjusting the pH of the oxide solution to about 14, (v) feeding the pH-adjusted oxide solution through a resin column to immobilise the ions K[TcO4] and eluting the ions K2[MoO4], (vi) eluting of bound ions [TcO4] from the resin column, (vii) feeding eluted ions K[TcO4] through an aluminium column to immobilise ions K[TcO4], (viii) washing K[TcO4] with water, (ix) elution of ions K[TcO4] with salt solution, and (x) extraction of ions K[TcO4].EFFECT: increased production efficiency of technetium-99 with uniform particle size.5 cl, 2 tbl, 29 dwg
ethod for heat treatment of sheets of mn-cu system alloys // 2639751
FIELD: metallurgy.SUBSTANCE: method for heat treatment of sheets of Mn-Cu system alloys for restoring their damping capacity includes heating at the temperature 150-400 °C, holding at least 525 s per 1 mm of sheet thickness and cooling at a rate at least 2 °C/s.EFFECT: increased recovery efficiency of Mn-Cu alloys with Mn content 36-80 percent after holding or deformation.3 tbl, 3 ex
ethod of thermomechanical treatment of sheets of two-phase titanium alloys to produce low values of thermal coefficient of linear expansion (tclp) in plane of sheet // 2639744
FIELD: metallurgy.SUBSTANCE: method for thermomechanical treatment of sheet semi-finished products made of two-phase titanium alloy with molybdenum equivalent from 3.3 to 22% includes hot rolling of semi-finished sheet products and cold longitudinal-transverse rolling. Hot rolling is carried out at temperature from 500°C to Tpt - 20°C with total reduction of not less than 10%, then hardening is carried out from temperature in the range from 600°C to Tpt, and subsequent cold longitudinal-transverse rolling of semi-finished sheet product is carried out at temperature not higher than 300°C with total reduction from 1 to 30%, where Tpt is temperature of complete polymorphic transformation of used alloy melt. The TCLP value is not more than 5⋅106 K-1 in sheet plane in the temperature range from -140 to +80°C, while strength is greater than 900 MPa and ductility more than 5%.EFFECT: producing low values of thermal coefficient of linear expansion in the sheet plane.3 tbl, 1 ex

ethod for manufacture of product based on molten chromium with high content of carbon from material containing chromium and carbon // 2639741
FIELD: metallurgy.SUBSTANCE: method includes continuous introduction of briquettes or pellets based on chromium directly into electric melting apparatus, heating and melting the briquettes or pellets based on chromium to form molten chromium with high content of carbon, preventing oxidation of molten chromium with high carbon content by minimising access of oxygen-containing gas at specified heating stage, carbonising molten chromium with high carbon content to form molten metallised chromium with high carbon content, cleaning molten metallised chromium with high carbon content by reducing silicon oxides to silicon and desulfurizing molten metallised chromium with high content of carbon to manufacture product on based on molten chromium with high carbon content and controlling silicon level in the electric melting apparatus by adding carbon to the electric melting apparatus. A portion of carbon is added to the electric melting apparatus in the composition of briquettes or chromium-based pellets through preliminary reduction furnace, and additional carbon is added to the electric melting apparatus from the source, which is different from briquettes or chromium-based pellets and pre-reduction furnace, and tapping the finished product.EFFECT: invention makes it possible to produce a molten chromium-carbon product with carbon concentration of 4-12 percent.21 cl, 3 dwg
Steel // 2639428
FIELD: metallurgy.SUBSTANCE: invention can be used for manufacturing engine parts, heat aggregates, pipes, metallurgical equipment and other products operating in an oxidizing environment at elevated temperatures. The steel contains, wt %: carbon 0.4-0.6; silicon 0.1-0.3; manganese 13.0-15.0; chrome 8.5-10.5; aluminium 3.0-3.5; rhenium 1.0-1.2; boron 0.1-0.12; iron - the rest.EFFECT: steel has high scale resistance.1 tbl

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 hydrometallurgical reverse extraction of lithium from fraction of galvanic batteries containing lithium oxide and manganese // 2639416
FIELD: chemistry.SUBSTANCE: when the method is implemented, the said fraction with a particle size of up to 500 mcm is solubilized by administration at temperatures of 30 to 70 °C into oxalic acid, the amount of which is stoichiometrically excessive in comparison with the manganese content in lithium and manganese oxide. The process is carried out at a solid to liquid ratio in the range of 10 to 250 g/l. The resulting lithium-containing solution is separated, and the remaining precipitate is washed, at least, twice. The separated solution with lithium and the lithium-containing washing solutions are combined. The residual content of manganese in the dissolved state is reduced by precipitation in the form of hydroxide, separated and washed, and the remaining lithium-containing solution is further purified by conversion to carbonate, chloride or sulfate and, if necessary, subsequent crystallization.EFFECT: reduction of energy consumption of the process and purity of lithium salts.8 cl, 1 tbl, 1 ex

Plasma method and device for recovery precious metals // 2639405
FIELD: metallurgical engineering.SUBSTANCE: method includes heating the raw material in the plasma oven to form a top slag layer and a lower molten metal layer, removing the slag layer, removing the molten metal layer, solidifying the removed molten metal layer, fragmenting the solidified metal layer to form fragments, and recovering a composition rich of the precious metal from these fragments. The raw material includes a precious metal-containing material and a metal-collector, the said metal-collector is a metal or an alloy that is capable of forming a solid solution, alloy or intermetallic compound with one or more precious metals. The removed layer of molten metal is poured onto the pouring table to solidify it.EFFECT: increased recovery of precious metals.17 cl, 8 tbl, 11 dwg

ethod for pyrometallurgical processing of oxidized nickel ore // 2639396
FIELD: metallurgy.SUBSTANCE: method involves charging oxidized nickel ore together with fluxing additives and carbonaceous material, taken in amount of 1.0-1.1 of stoichiometric amount required for partial metallisation of nickel and reduction of iron to bivalent state into the metallization furnace, heating the charge to the temperature 50° C lower than the temperature of its softening beginning due to the gases heat generated in waste heat boiler, feeding the heated charge to a three-zone furnace where melting of metallized charge takes place in the melting zone due to the heat comes from combustion of natural gas in oxygen with oxidant consumption factor α=0.8-0.9. Obtained melt is fed into bubbling zone for treatment by purging through tuyeres of gas-reducer heated by plasma to temperature ensuring melt temperature of 1500-1600°C and chemical composition, corresponding to the composition of the combustion products of natural gas in oxygen with the ratio of oxidant flow rate α=0.5-0.6, with separation of obtained ferronickel and slag, then the slag melt is reduced by carbonaceous reducing agent in production zone of metal-semi-product by melting in liquid bath, in this case, afterburning of the exhaust gases of the bubbling zone and the production zone of the metal semi-product is carried out in the melting zone, and cooling them to temperatures required in metallisation furnace, in waste-heat boiler.EFFECT: invention makes it possible to produce ferro-nickel containing more than 70 percent of nickel and a metal semi-product for the production of steel.3 cl, 2 dwg

ethod of complex processing phosphogypsum // 2639394
FIELD: chemistry.SUBSTANCE: invention is designed to extract rare-earth elements (REE) from dump phosphogypsum (PG) and to produce a gypsum binder. Sulfuric acid leaching of the REE from the pulp of FG is carried out in the circulation mode with electrochemical and cavitation activation. The pulp is separated by filtration on the first cake and the productive solution of the REE, the oxalates of the REE are precipitated with a solution of oxalic acid. One part of the solution is filtered to produce the second cake, combined with the first cake and sent to the production of gypsum. The other one is used as a circulating solution. The FG is prepared by crushing and soaking in a recycled solution based on the filtrate of the spent product solution. From the prepared FG, the REE is leached by portions.EFFECT: method allows to increase the completeness of processing, to eliminate the need for sharpening solutions of sulfuric acid during the leaching process, to reduce the residual concentration of fluoride ion below the maximum allowable concentrations, that will provide savings of reagents in the neutralisation of dumps.9 cl, 3 dwg