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

C   Chemistry; metallurgy(311501)
C22            etallurgy; ferrous or non-ferrous alloys; treatment of alloys or non-ferrous metals(27704)
Thermomechanical processing of nickel-based alloys // 2607682
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, specifically to thermomechanical treatment of nickel-based alloys. Method for thermomechanical treatment of nickel-based alloy includes a first step of heating a workpiece to temperature 1,093–1,163 °C, a first step of rotary forging workpiece heated to 1,093–1,163 °C with reduction of cross section area by 30–70 %, a second step heating workpiece to temperature 954–1,052 °C, wherein between end of first forging step and beginning of second step of heating workpiece is kept at temperature below temperature of dissolution of carbides M23C6 and does not allow it to cool to ambient temperature, and second step of rotary forging workpiece heated to 954–1,052 °C with reduction of cross section area by 20–70 %.EFFECT: treated alloys are characterised by stability and high strength in a wide range of high temperatures.45 cl, 3 dwg, 1 ex
ethod of processing sulphide gold containing concentrates and ores // 2607681
FIELD: technological processes.SUBSTANCE: invention relates to method of processing sulphide gold containing arsenic concentrates. Method involves mixing, annealing, treatment of gas phase and cinder leaching with extraction of gold, silver, nonferrous and rare metals. Batch is prepared by mixing concentrate with ammonium chloride in weight ratio of 1:0.3–1:3.0. Coal is added to batch in weight ratio of 1:0.01–1:0.1 and annealed at temperature not higher than 300 °C to produce mixture of sublimates in gas-phase, FeCl2+FeCl3, which are subjected to recovery of iron in high-purity metal form at temperature of 550–650 °C. Technical result is significant increase of amount of extracted gold, silver, iron with purity of 99.99 %, nonferrous and noble metals.EFFECT: increased number of extracted gold, silver, iron, nonferrous and noble metals; wherein significant environmental effect is achieved due to complete recultivation of sludge concentrate and all accompanying wastes.1 cl, 1 ex
High-strength seamless steel pipe for use in oil well, high resistance to cracking under stresses in sulphide-bearing medium // 2607503
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, namely to a high-strength seamless steel pipe suitable for use in oil wells. Seamless steel pipe is made from steel containing in wt%: C 0.15–0.50, Si 0.1–1.0, Mn 0.3–1.0, P 0.015 or less, S 0.005 or less, Al 0.01–0.1, N 0.01 or less, Cr 0.1–1.7, Mo from 0.40–1.1, V from 0.01–0.12, Nb 0.01–0.08, Ti 0.03 or less, B 0.0005–0.003, Fe and inevitable impurities – the rest. Structure of the steel pipe consists of a tempered martensite phase as the main phase and a former austenitic grain with the grain size of 8.5 or more. On four sections located at 90° from each other on a circumference hardness as per Vickers scale HV10 measured at the load of 10 kgf is equal to 295 HV10 or less in each of the three areas: in the area on the inner surface side at a distance from 2.54 to 3.81 mm from the inner surface of the pipe in the direction of its thickness, in the area on the outer surface side at a distance from 2.54 to 3.81 mm from the outer surface of the pipe in the direction of its thickness, and in the area in the center of the pipe wall thickness.EFFECT: pipe is characterized by high resistance to cracking under stresses in a sulphide-bearing medium.16 cl, 1 dwg, 3 tbl
ethod of making articles from tungsten-copper pseudo alloys // 2607478
FIELD: manufacturing technology.SUBSTANCE: invention relates to making articles based on tungsten-copper pseudo alloys. Method involves preparation of tungsten charge, pressing of workpieces, workpieces sintering with formation of porous frame, making contact of produced workpiece side with copper, taken with excess, workpiece impregnation with copper and its cooling. Impregnated workpiece is cooled down from impregnation temperature to copper crystallization temperature, wherein in impregnated blank temperature gradient is created, directed to copper excess location area from workpiece opposite side with provision of workpiece cooling on side opposite to said area. Enabling production of articles with theoretical density of up to 99.6–100 % and absence of properties anisotropy.EFFECT: higher density of articles.1 cl, 2 ex
ethod of producing composite diamond-containing matrix with increased diamond holding based on hard-alloy powder mixes // 2607393
FIELD: manufacturing technology.SUBSTANCE: invention relates to production of diamond tools based on hard-alloy powder mixes. Method of producing a diamond-containing matrix of a diamond tool involves preparation of a hard alloy powder mix, its plastification, in-layer filling the prepared charge and placing diamond grains with a shell of chromium particles into a metal mold, molding the charge with diamond grains into a briquette and sintering the briquette in the furnace with a low-melting metal or alloy in the direction from the bottom to the top. Diamond grains are used with the shell of a uniform layer of chrome particles with the thickness of not less than 5 % from the minimum linear size of diamond grains produced by fixing a plasticized powder of chrome on the surface of diamond grains with subsequent drying. Sintering the briquette in the furnace is performed by heating first for 60–90 minutes up to the temperature of 600 °C, then for 60–70 minutes up to the temperature of 860–1,000 °C, after that up to the temperature of 1,100 °C with provision of thermodiffusion metal coating of the diamond grains with chromium.EFFECT: provided is reduced consumption of diamonds due to increased strength and reliability of diamond grains fixing in the tool matrix, as well as higher resistance of the diamond tool.3 cl, 1 dwg
ethod for two-step sodium calcining of vanadium-containing material // 2607293
FIELD: metallurgy.SUBSTANCE: present invention describes a method for two-step sodium calcining of vanadium-containing material, including successive execution of a first calcining step and a second step of calcining raw material. Raw material is a mixture of vanadium-containing material with addition of sodium salt. Temperature at second calcining step is 760–800 °C, wherein temperature at second calcining step is higher than that at first calcining step, and duration of both first calcining step, and second calcining step is 60–300 minutes.EFFECT: technical result is improved process of converting vanadium due to elimination of agglomeration and sticking of material when calcining.9 cl, 3 ex
ethod for two-step calcination of vanadium-containing material // 2607292
FIELD: chemistry.SUBSTANCE: invention relates to a method for two-step calcination of vanadium-containing material. Method involves performing a first step of calcining raw material followed by performing a second calcination step. Temperature at first calcination step is maintained below temperature at second calcination step. Temperature at first calcination step is 750–850 °C, and temperature at second calcination step lies within range of 840–900 °C. Duration of second calcination step is 60–300 minutes. Raw material is a mixture containing vanadium-containing material and calcium-containing material.EFFECT: technical result is prevention of sintering of material and its sticking to equipment, which increases rate of loading material, increases output and efficiency of production, and significantly improves vanadium conversion factor.10 cl, 3 ex
ethod of calcining vanadium-containing material // 2607290
FIELD: technological processes.SUBSTANCE: invention relates to a method of calcining a vanadium-bearing material. Method includes: contacting and reacting raw materials with clinker in calcining conditions. Raw material is a mixture containing vanadium-bearing material and calcium-containing material, and clinker is a material subjected to calcining.EFFECT: technical result is preventing sintering of material into lumps and its sticking to equipment; reduced production costs and substantial improvement of conversion of vanadium.10 cl, 3 ex
Extraction of silver ions from hydrochloric acid solutions with tributyl phosphate // 2607285
FIELD: chemistry.SUBSTANCE: invention relates to a method of extracting silver ions from aqueous solutions and is used in extraction of substances with organic extractants from aqueous solutions and can be used in non-ferrous and ferrous metallurgy, as well as for cleaning industrial and household wastes. Method of extracting silver ions from solution with tributyl phosphate (TBP) includes contacting extractant and solution, mixing, settling and separation of phases. Extraction is carried out from hydrochloric acid solutions with concentration 3 n. HCl and 240 g/dm3 NaCl with addition of TBP in portions at temperature t = 20 °C.EFFECT: technical result consists in efficiency of extracting silver from aqueous solutions.1 cl, 3 dwg, 4 tbl, 6 ex
ethod of extracting ions from aqueous solutions // 2607284
FIELD: chemistry.SUBSTANCE: invention relates to a method of extracting metal ions from aqueous solutions and can be used in non-ferrous and ferrous metallurgy, as well as for cleaning industrial and household wastes. Method of extracting metal ions from aqueous solutions with tributyl phosphate includes preparation of initial solution and extraction agent, contacting solution and extraction agent and phase separation. Extraction is carried out from chloride solutions, containing soluble chloride complexes of gold, silver, zinc and iron ions, with concentration of 2–3 n. HCl and 240 g/dm3 NaCl. Extraction is carried out at stage-feeding of portions at ratio O:W = 1:5 for 10 minutes at each stage. Extraction of gold ions and iron ions is carried out at 60 °C. Extraction of silver ions and zinc ions is carried out at temperature 20 °C.EFFECT: technical result consists in improvement of kinetic characteristics of process and degree of extraction of extractable substance, as well as in reduction of extractant consumption.3 cl, 5 dwg, 16 tbl, 5 ex
ethod of producing refractory materials // 2607115
FIELD: manufacturing technology.SUBSTANCE: invention relates to production of refractory materials. Method involves preparation of exothermic mixture of powders and mixture of powders of chemical furnace, formation of layered batch, initiation of combustion reaction therein in form of self-propagating high-temperature synthesis (SHS) with pressing of obtained SHS product. Mixture of powders of chemical furnace is made of stoichiometric mixture of powders of titanium and carbon black. Formation of layered batch is performed by placing exothermic mixture of powders inside mixture of powders of chemical furnace at ratio of thicknesses of exothermic mixture of powders and mixture of powders of chemical furnace equal to 1:0.5–1:4. Exothermal mixture of powders is separated from mixture of powders of chemical furnace 0.1–1.0 mm thick graphite layer. Initiation of combustion reaction in form of SHS is performed simultaneously in mixture of powders of chemical furnace and exothermic mixture of powders at pressure of 5–20 MPa and 1–20 s after initiation obtained SHS product is pressed under pressure of 100–450 MPA during 1–30 c, then it is cooled and obtained refractory material is separated from combustion products of mixture of powders of chemical furnace.EFFECT: decreased residual porosity and high hardness of material are achieved.1 cl, 1 dwg, 1 tbl, 2 ex
ethod of producing articles from refractory materials // 2607114
FIELD: technological processes.SUBSTANCE: invention relates to production of articles from refractory materials. Method involves preparation of an exothermic mixture of powders, forming a charge billet, initiating a reaction of self-propagating high-temperature synthesis (SHS) and pressing the obtained product of the SHS. Exothermal mixture of powders is pressed into briquettes with the thickness of 10–30 mm and the relative density of 0.5–0.7. Charge billet is formed in the form of layers of the said briquettes from the exothermic mixture of powders separated by a layer of graphite of 0.2–1.0 mm thick. SHS reaction is initiated simultaneously in all layers of the charge billet at the pressure of 5–20 MPa, herewith in 1–20 sec after the initiation the obtained product of the SHS is pressed at the pressure of 100–450 MPa for 1–30 sec.EFFECT: provided is obtaining articles with minimal residual porosity and high hardness.1 cl, 1 dwg, 1 tbl, 2 ex
ethod of extracting gold from ash-slag wastes // 2607112
FIELD: technological processes.SUBSTANCE: invention relates to a method of extracting gold from ash-slag wastes including contact of the initial raw material in the form of ash from burning coal with a dissolving medium. Herewith the ash is used from burning coal at a temperature higher than the gold melting point and providing a content of gold particles in the ash of superfine and nanosizes. Dissolving medium used is water. Contact of the said ash with water is carried out while stirring the solution for not less than 20 minutes with further extraction of gold from the aqueous solution by sorption with activated carbon, separation of coal, its regeneration with extraction of gold from regenerating solutions by electrolysis and melting for schlich gold.EFFECT: technical result is enabling gold transfer into the aqueous phase and creating conditions for implementing the technology of selective extraction of gold from ash-slag wastes with high efficiency without using expensive reagents.1 cl, 1 ex
ethod of producing powdered magnetically hard alloy 30h20k2m2v of iron-chrome-cobalt system // 2607074
FIELD: technological processes.SUBSTANCE: invention relates to production of powder of magnetically hard alloys. Method of producing powder of magnetically hard alloy 30H20K2M2V of iron-chrome-cobalt system involves preparing a mixture of powders of iron, chromium, cobalt, molybdenum and tungsten, moulding produced mixture, sintering, thermal treatment and thermo-magnetic treatment. After sintering before thermal treatment, method comprises hot plastic deformation with drawing of not less than 1.1. Thermo-magnetic treatment is carried out in temperature range 650–600°C.EFFECT: sintering temperature of alloy is lowered and magnetic hysteresis properties of alloy are improved while maintaining high coercitive force.1 cl, 1 tbl, 1 ex
Powder of iron-based alloy for wear-resistant surfacing and sputtering // 2607066
FIELD: chemistry.SUBSTANCE: invention relates to powder alloy, which can be used for application of wear-resistant and corrosion-resistant coating by deposition or sputtering. Powder of iron-based alloy contains 2.9–3.3 wt% carbon, 0.4–1.0 wt% silicon, 0.4–1.2 wt% manganese, 17–21 wt% chromium, 0.15–1.2 wt% aluminium, 3–4.5 wt% vanadium, 0.02–0.12 wt% barium, not more than 0.06 wt% sulphur and not more than 0.07 wt% phosphorus.EFFECT: higher impact-abrasive wear resistance, as well as stabilisation of hardness of surfaced coat.1 cl
ethod of producing a cast composite material // 2607016
FIELD: metallurgy.SUBSTANCE: invention refers to metallurgy and can be used for production of composite cast materials for parts of vehicles, machines and equipment. Method involves preparation of aluminium charge containing 20 % of aluminium scrap and 80 % of aluminium scrap with addition of liquid hydrocarbon, one loads into furnace 20 % of aluminium scrap, its melting and subsequent loading into liquid aluminium scrap melt with addition of liquid hydrocarbon, and after complete melting of charge one blows the melt with oxygen during 3 hours under slag layer formed on melt mirror, which is removed at the end of the blowing, and produced melt is poured into the mold.EFFECT: invention ensures production of cast composite material with aluminium matrix reinforced with plate-like inclusions of aluminium oxide, with high mechanical properties.1 cl, 1 dwg, 1 tbl
ethod for complex enrichment of rare-earth metal ores // 2606900
FIELD: metallurgy.SUBSTANCE: invention can be used for complex processing of rare-earth metal ores, mainly tantalum-niobium ores. Method involves classification and gravitational separation of mesh minus, screw separation with subsequent concentration, extraction of scrap and nonmagnetic fractions. Non-magnetic fractions, obtained as a result of low-intensity magnetic separations, are subjected to additional dressing. Additional dressing is carried out by wet high-intensity magnetic separation 1 to produce magnetic, non-magnetic and intermediate fractions with their subsequent gravity dressing. Cleaner tailings are directed to dump. Gravity cleaner concentrates of non-magnetic and intermediate fractions after concentration on a table are combined with previously obtained non-magnetic product of low-intensity magnetic separation concentrate of table.EFFECT: high efficiency of concentration of ores, high degree of extraction of useful minerals due to improved conditions of their opening at grinding, as well as high environmental safety when using developed concentration process of these types of crude mineral ore.4 cl, 1 dwg, 4 tbl
High-strength wear-resistant steel for agricultural machines (versions) // 2606825
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, specifically high-strength and wear-resistant steel, used in making heavily loaded parts of working elements of tillage, sowing, fodder harvesting, vegetable harvesting and other agricultural machines. Said steel contains, wt%: carbon from more than 0.30 to 0.35, chromium 0.30–0.50, nickel 0.25–0.40, copper 0.20–0.40, molybdenum 0.05–0.15, silicon 0.10–0.30, manganese 0.80–1.00, vanadium 0.01–0.03, niobium 0.01–0.04, boron 0.001–0.005, titanium 0.01–0.03, aluminium from 0.01 to less than 0.05, nitrogen not more than 0.015, calcium 0.001–0.02, sulphur of not more than 0.020, phosphorus not more than 0.020, iron and impurities – balance, wherein total content of phosphorus and sulphur is not more than 0.025.EFFECT: steel has guaranteed yield point for three versions respectively of not less than 1,200 MPa, relative elongation of not less than 7–8 %, impact strength value at +20 °C of not less than 20–30 J/cm2, relative uniform elongation of not less than 2–2,5 % and high wear resistance.3 cl, 2 tbl, 1 ex
ethod of processing nepheline ore // 2606821
FIELD: technological processes; mining.SUBSTANCE: invention relates to a method of processing alumina-containing material and can be used in sintering technology of producing alumina and soda products from nepheline ore. To reduce consumption of nepheline ore in a nepheline-limestone-soda charge, ash-slag wastes are added in an amount from 0.1 to 10 % of weight of nepheline ore.EFFECT: nepheline ores and recycling of ash-slag wastes with post-extraction of valuable components therefrom.1 cl, 5 tbl
ethod of processing vanadium containing iron-titanium concentrate // 2606813
FIELD: chemistry.SUBSTANCE: invention relates to a method of processing vanadium-containing iron-titanium oxide concentrate. Charge is formed from concentrate and sodium chloride. Charge is ground. Further, method comprises thermal treatment at 800–1,200°C in presence of oxygen to form a sinter. Sinter is ground and leached with water with transfer into solution 1 of sodium salt of vanadium and formation of primary leaching residue, containing undissolved compounds of vanadium, iron and titanium. Vanadium-containing solution is separated from primary residue, which is treated with solution of reagent, containing sulphur (IV), to form a solution 2, containing sodium salt of vanadium (IV). Obtained secondary residue is treated with sulphuric acid solution to form a solution of 3 and tertiary iron-titanium-containing residue. Produced solutions 1, 2 and 3 are combined, neutralised to pH 7–8 with precipitation of a mixture of salts. Tertiary residue is reduced at 1,100–1,300 °C to obtain iron-containing and titanium oxide concentrate. Method employs cheaper and readily available reagents.EFFECT: method increases degree of extraction of iron and titanium oxide.6 cl, 2 dwg, 6 ex
Flux for electroslag remelting // 2606691
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, in particular, to fluxes for electroslag technologies, for steel production and for refinement and modification of steel. Flux ANF-6-1 additionally contains cerium fluoride in the following proportions, wt %: flux ANF-6-1 75–80, cerium fluoride 20–25.EFFECT: invention allows to increase modifying capacity of flux and impact strength of steel at low temperatures, as well as reduce content of non-metallic inclusions in steel.1 cl, 1 tbl
ethod for thermomechanical treatment of cast (γ+α2)-intermetallic alloys based on titanium aluminide γ-tial // 2606685
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, specifically to metal forming and can be used for production from said materials of workpieces, semi-finished products and articles with a specified structure, used in aerospace and automobile equipment. Method for thermomechanical treatment of workpieces from cast (γ+α2)-intermetallic alloys based on γ-TiAl involves heating and deformation. Prior to heating and deformation workpiece is subjected to annealing at temperature within range of Tα-100 °C to Tα+100 °C for at least 10 minutes, where Tα is temperature of α↔γ transformation. Method then includes cooling workpiece at a rate of 5–100 °C/s to room temperature, heating is performed in (γ+α2)-phase region to temperature which is 5–200 °C below temperature of eutectoid transformation and deformation under isothermal conditions at a rate of deformation of 10-1-10-4 C-1 and deformation degree e not less than 0.7, followed by cooling workpiece at a rate of 5–100 °C/s to room temperature.EFFECT: reduced flow stress at deformation, providing a fine-grained structure.1 cl, 5 dwg, 11 ex
Palladium-based jewellery alloy (versions) // 2606679
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy of noble metals and alloys, particularly to palladium-based alloys used in jewellery industry. According to one version alloy contains, wt%: palladium 50–95, nickel 3–5, silicon 0.5–2, boron 0.01–1.0, at least one element selected from a group comprising copper, gold, indium, gallium in amount of less than 1.0 each, at total content of nickel and silicon of up to 5 %, wherein alloy has a structure reinforced with intermetallide Ni2Si. In another version alloy contains, wt%: palladium 50–85, nickel 11-13.5, aluminium 1.5–4, boron 0.01–1.0, at least one element selected from a group comprising copper, gold, indium, gallium, in amount of less than 1.0 each, at total content of nickel and aluminium of up to 15%, wherein alloy has structure reinforced with intermetallides Ni3Al, NiAl, Ni2Al3.EFFECT: technical result is improved strength properties and corrosion resistance of palladium alloy while maintaining level of casting properties, plasticity and white colour close to mounting plate.2 cl, 2 ex
Titanium-based alloy (versions) and article made therefrom // 2606677
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, specifically to titanium alloys, used to make load-carrying structures, operating for a long time at temperatures of up to 350 °C. Alloy contains, wt%: aluminium – 1.8–3.5, molybdenum – 1.0–3.0, vanadium – 8.0–12.0, chrome – 2.5–4.6, iron – 0.3–1.6, zirconium – 0.4–2.0, tin 0.4–2.0, ruthenium – 0.01–0.16, titanium – balance. Alloy can additionally contain yttrium and/or gadolinium 0.01–0.16.EFFECT: alloy is characterised by high characteristics of ultimate strength at 20 °C in quenched and thermally hardened conditions while maintaining satisfactory ultimate ductility and corrosion resistance against crevice and pitting corrosion.6 cl, 3 tbl, 8 ex
ethod for producing alloy containing titanium, iron, chromium and silicon, from aqueous suspension of particles of ores containing titanium, iron, chromium and silicon compounds, and device therefor // 2606670
FIELD: metallurgy.SUBSTANCE: invention relates to a method of producing an alloy comprising titanium, iron, chromium and silicon from an aqueous suspension of particles of ores containing compounds of said elements, and a device for its implementation. Method includes generating physical fields, their action on raw material mixture, recovery of metals and nonmetals, and forming them into a monolithic structural formation of an alloy composed of said elements.EFFECT: invention allows to obtain said alloy as a circular columnar single crystal directly from raw ore.2 cl, 5 dwg, 2 ex
ethod for producing alloy consisting of titanium, iron, chromium and zirconium, from aqueous suspension of particles of ores containing titanium, iron, chromium and zirconium compounds, and device therefor // 2606669
FIELD: metallurgy.SUBSTANCE: invention relates to a method of preparing an alloy consisting of titanium, iron, chromium and zirconium, from an aqueous suspension of particles of ores containing compounds of said elements, and a device for its implementation. Method comprises placing a starting material in device, generating therein physical fields, recovery of metals with accumulation of end product and discharge thereof from device. Alloy is formed in form of ring columnar crystalline form in form of alloy consisting of above metals. Physical fields acting on used raw materials are rack magnetic fields. Reduction is carried out when supplying to material and its layers jets of compressed air with component-reducing agent, represented by carbon in form of a jet.EFFECT: simple process and high operational reliability.2 cl, 5 dwg, 2 ex
ethod of cast steel parts controlled thermal treatment // 2606665
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and machine building. To increase cold resistance (impact strength) of railway cars steel cast parts following is successively performed: part heating to 860÷940 °C with holding, accelerated cooling at rate of 1÷25 °C/s to 400÷450 °C in air flow and isothermal self-tempering at room temperature. Weight of part from 20GL or 20G1FL steel is chosen so, that at its isothermal self-tempering at room temperature, part surface temperature reaches not less than 550 °C and not more than 650°C, wherein part heating is performed at rate of 5÷30 °C/min.EFFECT: higher cold resistance (impact strength) of railway cars steel cast parts.4 cl, 7 dwg, 2 tbl
Strip of aluminium alloy, resistant to intercrystalline corrosion and its manufacturing method // 2606664
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, particularly, to production of aluminium alloy of AA 5xxx type with Mg content at least 4 wt%, and can be used for car components production. Strip is made from aluminium alloy, having following composition, wt%: Si≤0.2, Fe≤0.35, 0.04≤Cu≤0.08, 0.2≤Mn≤0.5, 4.35≤Mg≤4.8, Cr≤0.1, Zn≤0.25, Ti≤0.l, balance is Al and unavoidable impurities making not more than 0.05 wt% individually and not more than 0.15 wt% in total, wherein strip from aluminium alloy has recrystallized microstructure, in which grain size (GS) of microstructure satisfies following relationship: GS>22+2*c_Mg, where (c_Mg) is Mg content in wt%.EFFECT: invention is aimed at production of AlMg alloy with Mg content at least 4 wt%, despite high strength having resistance to intercrystalline corrosion.12 cl, 2 tbl, 3 dwg
ethod of extracting metal mercury from mercury-containing wastes // 2606376
FIELD: metallurgy; technological processes.SUBSTANCE: invention relates to a method of metal mercury extraction from mercury-containing materials, in particular, process slimes, contaminated soils, construction wastes. Method involves initial disintegration of mercury-containing materials, obtaining an aqueous pulp from the mercury-containing materials in a mixing tank, multi-stage inertial separation of metal mercury, herewith at least one stage of the inertial separation is performed in a centrifugal concentrator having a drum with holes, inside which the water pulp is fed, herewith the metal mercury is collected on the outer side of the drum. Centrifugal concentrator drum inner surface is made in the form of two straight truncated cones with a common base arranged between end parts of the drum to make a triangular in cross section channel along the drum circumference in the area of the common base and minimum thickness of the walls. Initial disintegration is performed in a disintegrator with a high pressure system. Material with the particle size less than 2 mm is processed on a concentration table, mercury after the treatment is collected in reservoirs and the sludge product after the concentration table is fed to the centrifugal concentrator.EFFECT: provided is higher degree of metal mercury extraction from a wide spectrum of mercury-containing wastes, increasing energy efficiency and environmental friendliness.5 cl, 8 dwg
Intermetallic titanium-based alloy and article made therefrom // 2606368
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, in particular, to alloys based on intermetallic compounds of titanium and aluminium with operating temperature not higher than 825 °C, products of which can be used in designing aircraft gas turbine engines and surface power plants. Disclosed are versions of alloys based on gamma titanium aluminide. Alloy based on gamma titanium aluminide contains, wt%: aluminium 30.0–35.0, vanadium 0.7–3.5, niobium 1.2–6.0, zirconium 1.2–3.5 or chrome 2.0–3.5, gadolinium 0.2–0.6, boron 0.003–0.03, titanium – balance. Alloys are characterised by high values of yield point at a temperature of 20 °C, long-term strength (over 100 hours) at a temperature of 800 °C, as well as low tendency to formation of liquation heterogeneity of chemical composition.EFFECT: use in aircraft gas turbine engines and surface power plants.4 cl, 2 tbl, 6 ex
Steel sheet with high mechanical strength, ductility and formability properties, production method and use of such sheets // 2606361
FIELD: metallurgy.SUBSTANCE: invention relates to production of cold-rolled steel sheet with strength of more than 1,000 MPa, uniform elongation greater than 12 % and a V-bendability greater than 90°, which contains, wt%: 0.15 ≤ C ≤ 0.25, 1.8 ≤ Mn ≤ 3.0, 1.2 ≤ Si ≤ 2, 0 ≤ A1 ≤ 0.10, 0% ≤ Cr ≤ 0.50 %, 0 ≤ Cu ≤ 1, 0 ≤ Ni ≤ 1, 0 ≤ S ≤ 0.005, 0 ≤ P ≤ 0.020, Nb ≤ 0.015, Ti ≤ 0.020, V ≤ 0.015, Co ≤ 1, N ≤ 0.008, B ≤ 0.001, wherein Mn + Ni + Cu ≤ 3, balance is iron and unavoidable impurities formed during manufacture.EFFECT: microstructure consists in portions of area of 5–20 % polygonal ferrite, 10–15 % of residual austenite, 5–15 % of martensite, balance is bainite is in form of laths and includes carbides between laths, so that number N of inter-lath carbides larger than 0,1 micrometers per unit of surface area, is less than or equal to 50,000/mm2.15 cl, 3 dwg, 5 tbl
ethod for production of hot-rolled thick sheets from low-alloy steel for nuclear and power engineering // 2606357
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for making large-size products of nuclear and power engineering. For production of rolled stock with thickness from 80 to 150 mm with guarantee of standard properties after normalization with tempering of continuously cast workpieces with thickness of not less than 315 mm, austenisation of workpieces is carried out at a temperature of 1,200–1,215 °C, rough rolling is started at a temperature not lower than 950 °C and is performed to roll thickness not less than 1.3 thickness of finished sheet with relative reduction per pass of not less than 10 %, finish rolling is started at temperature of 115±25 °C above point of Ar3 and ends at 5–15 °C above temperature of beginning of finish rolling, then sheets are subjected to slow cooling in air in a stack. Continuous cast workpieces are made from steel containing, wt%: 0.09–0.12 C; 0.70–0.80 Si; 1.55–1.70 Mn; 0.20–0.30 Cr; 0.20–0.30 Ni; Cu ≤ 0.10; 0.015–0.030 Ti; N ≤ 0.008; 0.02–0,05 Al; S ≤ 0.002; P ≤ 0.010; Fe and impurities – balance.EFFECT: structure of finished sheet is represented by ferrite and sorbite-like pearlite in volume ratio of not less than 30 % and is characterised by high homogeneity, wherein grains, different from prevailing number more than 1 occupy an area of not more than 10 %.1 cl, 4 tbl
High-fire resistance casting aluminium alloy and cast products for internal combustion engines, cast from said alloy // 2606141
FIELD: metallurgy.SUBSTANCE: invention relates to cast alloys based on aluminium and can be used for making internal combustion engine parts. Alloy contains, wt%: Cu 6.0–8.0, Mn 0.3–0.55, Zr 0.18–0.25, Si 3.0–7.0, Ti 0.05–0.2, Sr up to 0.03, V up to 0.04, Fe up to 0.25, balance is aluminium and unavoidable impurities. Casting aluminium alloy has high mechanical properties after a long period of operation at high temperatures and can also fill mould well during casting.EFFECT: cast products according to present invention have optimised mechanical properties during operation at high temperatures and can also be reliably made by casting.12 cl, 4 dwg, 6 tbl
Application of alumina-carbon agglomerates to carbo-thermic production of aluminium // 2606103
FIELD: mining.SUBSTANCE: invention relates to alumina-carbon agglomerates for vapor recovery reactor in furnace for carbo-thermic reduction of alumina. Agglomerate is composed in form of cylinder containing hollow core, and containing source of alumina and shell containing source of carbon and binder. Disclosed is method for application of alumina-carbon agglomerates to recovery of aluminium-containing vapor components, and useful use of waste heat of exhaust gases in vapor recovery reactor for formation of recyclable material. Formed recyclable material contains aluminium carbide and Al carbide containing slag, which are recirculated into carbo-thermic reduction furnace.EFFECT: catching of aluminium-containing vapor components is simplified, and flow limitation is achieved of obtained recirculated material, containing aluminium carbide, in carbo-thermic furnace for aluminium production.14 cl, 6 dwg

Aluminium-based alloy // 2605873
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, particularly to aluminium-based alloys, which can be used, for example, in mechanical engineering for making various structural parts. Aluminium-based alloy contains following, wt%: silicon 0.3-0.5; copper 3.0-5.0; magnesium 0.15-0.3; manganese 0.3-0.5; titanium 0.2-0.3; iron 3.0-5.0; zirconium 2.9-3.3; aluminium - balance.EFFECT: increased high temperature resistance of alloy.1 cl, 1 tbl

ethod of processing tungsten concentrates // 2605741
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy of rare metals. Method of processing of tungstenite concentrates involves preparation of charge, its sintering and subsequent autoclave-soda leaching of sintering product. Charge is prepared by mixing tungstenite concentrate, rough commercial product in form of 4-7 % concentrate of primary flotation scheelite ore containing calcite 40-60 % and sodium carbonate in amount of 5 % of total weight of charge, and charge sintering is performed at 750-800 °C for 2-4 hours.EFFECT: providing transfer of hard-to-extract tungstenite into easy-to-extract scheelite.1 cl, 3 dwg, 1 ex

Elinvar alloy with high modulus of elasticity and article made therefrom // 2605732
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, specifically, to elinvar alloys, and can be used in production of elastic-sensitive elements of precision instruments, power springs and structural components of special purpose. Age-hardening alloy with low temperature coefficient of normal elasticity modulus with high modulus of elasticity contains, wt%: cobalt - 40-45; nickel 14-17; niobium 4.5-6.5; rhenium 1.5-2.5; molybdenum 0.1-2.0; zirconium 0.5-2.5; aluminium 0.1-1.5; titanium 1.5-3.5; copper 0.1-1.5; boron 0.001-0.03; neodymium 0.001-0.05; cerium 0.01-0.1; lanthanum 0.01-0.1; iron - balance.EFFECT: alloy is characterised by high characteristics of ultimate strength, elasticity modulus.2 cl, 3 tbl, 5 ex
Strip or sheet of electric steel with unoriented grain structure, structural element made thereof and method of strip or sheet production from electric steel with unoriented grain structure // 2605730
FIELD: technological processes.SUBSTANCE: invention relates to production of strips or sheets from electrotechnical steel with unoriented grain structure. Method comprises following steps: a) creation of hot-rolled steel strip or sheet, which contains following, wt%: 1.0-4.5 of Si, up to 2.0 of Al, up to 1.0 of Mn, up to 0.01 of C, up to 0.01 of N, up to 0.012 of S, 0.1-0.5 of Ti, 0.1-0.3 of P, iron and unavoidable impurities are rest, wherein for ratio %Ti/%P applies inequality 1.0≤%Ti/%P≤2.0, where %Ti is Ti percentage, in wt% and %P is P percentage, in wt%, b) cold rolling of hot-rolled strip or sheet with production of cold-rolled strip or sheet, c) final annealing of cold-rolled strip or sheet, during which cold-rolled strip or sheet is passed through continuous annealing furnace for two-staged short-term annealing, at which cold-rolled strip or sheet: d.1) is first annealed at first annealing stage for 1-100 s at annealing temperature of, at least 900 °C and not more than 1,150 °C. Then d.2) annealed at second annealing stage for 30-120 s at annealing temperature of 500-850 °C.EFFECT: technical result consists in improvement of sheet or strip strength with simultaneous low hysteresis losses at high frequencies.1 cl, 8 tbl

Electric sheet steel with aligned grain structure and its manufacturing method // 2605725
FIELD: metallurgy.SUBSTANCE: invention relates to electric sheet steels. Electric sheet steel with an aligned grain structure comprises grooves, each of which passes in the direction, which intersects the direction of rolling the said sheet steel, herewith the said grooves are formed by a laser beam irradiation with preset PL pitches in the rolling direction. Shape of each of the grooves on the front surface of the said sheet steel is determined as a curved line on the above said steel. Herewith the connection between D value of standard deviation and PL pitch satisfies the following ratio (1), where D value is the standard deviation of distances between a linearly approximated direct line produced from a curved axial line of each groove in the groove width direction by the least squares method and corresponding positions on the said curved axial line, the mean angle formed between tangents in each of the said positions on the said curved axial line and the direction perpendicular to the rolling direction is from more than 0 to 30°: 0.02 ≤ (D/PL).EFFECT: technical result is reduction of iron losses in the sheet steel.5 cl, 7 dwg

ethod of increasing serviceability of contact pair for electric low-current sliding contacts // 2605724
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, in particular, to heat treatment of alloys based on gold, and can be used in production of low-current sliding contacts (LSC), used in collectors of devices and systems. Method includes heating a contact pair, consisting of a ring and a brush made from an equimolecular alloy ZlM-80, in a protective atmosphere to temperature of 350 °C at a rate of not more than 0.2 deg/s, holding at said temperature and cooling in a vacuum at a rate of not more than 0.2 deg/s.EFFECT: technical result is high wear resistance of LSC.1 cl, 1 ex, 1 tbl
Powder material based on iron for stages of submersible centrifugal pumps // 2605719
FIELD: engines and pumps.SUBSTANCE: invention relates to powder materials based on iron for stages of submersible centrifugal pumps. Material contains 0.08-0.95 wt% of carbon, 4.0-16.0 wt% of nickel, 0.8-5.6 wt% of molybdenum, 1.2-6.8 wt% of tungsten, 1.8-14.2 wt% of cobalt and iron - balance.EFFECT: higher mechanical strength and corrosion resistance of material after ageing.1 cl
Powder material based on iron for stages of submersible centrifugal pumps // 2605718
FIELD: engines and pumps.SUBSTANCE: invention relates to powder materials based on iron for stages of submersible centrifugal pumps. Material contains 0.1-0.9 wt% of carbon, 6.0-26.0 wt% of nickel, 0.9-9.1 wt% of molybdenum, 0.06-2.75 wt% of tungsten and iron - balance.EFFECT: decreased residual porosity of structure of material after sintering, high mechanical strength and hardness of material.1 cl

Cast iron // 2605542
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, in particular to compositions of iron, which can be used for production of casts, operating under thermal loads. Cast iron contains, wt%: carbon 3.0-3.3; silicon 0.1-0.3; manganese 0.6-0.8; aluminium 2.0-2.5; antimony 0.001-0.003; copper 0.4-0.6; boron 0.05-0.15; nickel 4.0-5.0; iron - balance.EFFECT: production of casts.1 cl, 1 tbl

Slag forming mixture for steel refining // 2605410
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for steel refining in "ladle-furnace" aggregates and vacuum vessels. Slag-forming mixture contains as flux secondary aluminium production wastes and a slag component and additionally sodium bicarbonate at following ratio of components, wt%: sodium bicarbonate 1.0-2.0, wastes from production of secondary aluminium 10.0-30.0, slag component makes up balance. Secondary aluminium production wastes, having following chemical composition, wt%: fine Al metal 5.0-20.0, Al2O3 50.0-75.0, MgO 5.0-12.0, SiO2 1.0-10.0, (NaCl+KCl+NaF+KF+Na2O+K2O) 5.0-20.0.EFFECT: achieving low viscosity of slag, high degree of refinement and desulphurisation of steel, resistance of lining.1 cl, 1 dwg, 3 tbl

Systems and methods for recycling steelmaking converter exhaust residue and products made thereby // 2605409
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for processing sludge from a fume scrubbing system of a steelmaking converter and articles made therefrom. System includes equipment for separation and processing of sludge for separation of substantially microspheres metallic iron from material not related to metal iron, wherein said separation equipment comprises an ultrasonic cleaner for removal of surface of small fractions, associated with microspheres metallic iron using at least two different excitation frequencies of acoustic cavitation for creation of metal microspheres with treated surface, and moulding equipment for arrangement of microspheres of metallic iron with treated surface, separated by said equipment for separation, and moulding using same lumpy material substantially consisting of microspheres of metallic iron. Lumpy material is used as a charge material in melting steel in steelmaking converter or arc furnace.EFFECT: invention enables to use briquettes with high content of metal iron in steelmaking charge material for oxygen converter or arc furnace, and water used in system, which is returned and reused in system, making system harmless to environment, as well as use of sludge in form of pellets and/or agglomerate for production of cast iron.24 cl, 16 dwg

Cold-rolled steel sheet and method for manufacture thereof, and hot-formed article // 2605404
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, particularly, to cold-rolled steel plate used in automotive industry. Sheet has chemical composition, containing, wt%: C from 0.1 to 0.3, Si from 0.01 to 2.0, Mn from 1.5 to 2.5, P from 0.001 to 0.06, S from 0.001 to 0.01, N from 0.0005 to 0.01, Al from 0.01 to 0.05, B from 0 to 0.002, Mo from 0 to 0.5, Cr from 0 to 0.5, V from 0 to 0.1, Ti from 0 to 0.1, Nb from 0 to 0.05, Ni from 0 to 1.0, Cu from 0 to 1.0, Ca from 0 to 0.005, REM from 0 to 0.005, Fe and unavoidable impurities - balance. Structure before and after hot forming includes a ferrite with fraction of area from 30% to 90%, martensite with fraction of area of 0 % or more and less than 20 %, pearlite with fraction of area from 0 % to 10 %, residual austenite from 5 % by volume to 20 % by volume, remaining structure - bainite. Hardness of residual austenite, measured with a nano-indentor before and after hot forming, satisfies expression H2/H1 < 1.1 and expression σHM < 20, and ultimate tensile strength and ductility satisfy relationship: TS×El ≥ 20,000 MPa·%, where H1 is hardness of residual austenite present inside surface part on thickness before and after hot forming, wherein surface part on thickness is a zone within 200 mcm in direction of thickness from surface of cold-rolled steel sheet, H2 is a hardness of residual austenite, located inside central part on thickness before and after hot forming, wherein central part on thickness is a zone in range of ±100 mcm along direction of thickness from central plane of cold-rolled steel sheet in direction of thickness, σHM is a change in hardness of residual austenite inside central part on thickness before and after hot forming, TS is tensile strength of cold-rolled steel sheet, MPa, and El is ductility of cold-rolled steel sheet in %.EFFECT: high ductility and formability.16 cl, 5 dwg, 8 tbl, 1 ex
Cast iron for disc brakes rims // 2605397
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy, namely, to development of material for disc brakes rims production. Cast iron for disc brakes rims making contains, wt%: carbon 3.6-3.8, silicon 2.2-2.5, manganese 0.25-0.35, phosphorus up to 0.1, sulphur up to 0.025, chromium up to 0.15, magnesium up to 0.03, iron is rest, and has structure, containing regular shaped flake graphite with uniformly distributed spherical graphite, comprising not more than 20 % of section area.EFFECT: task of invention, is increasing friction resistance and strength, increasing material uniformity, which decreases distortion and local overheating.1 cl

High-strength steel pipes with low ratio of yield strength to ultimate strength, welded with electric contact welding, steel strip for pipes, welded with electric contact welding, and manufacturing methods thereof // 2605396
FIELD: technological processes.SUBSTANCE: invention relates to high-strength steel pipe with low ratio of yield strength to ultimate strength, welded with electric contact welding, with ratio of yield strength to ultimate strength of 80 % or less and TS 655 MPA or higher and its manufacturing method. In particular, steel material of composition, including, wt%: 0.38-0.45 C, 0.15-0.25 Si, 1.0-1.8 Mn, 0.03 or less P, 0.03 or less S, 0.01-0.07 sol. Al and 0.005 or less N by weight is subjected to rough and finish rolling, at which initial temperature is 950 °C or lower and final temperature is 820-920 °C, thus hot-rolled steel strip is obtained. Strip is wound at temperature of 650-800 °C, then unwound, molded and welded with electric contact welding at room temperature.EFFECT: manufacturing of steel pipe with small changes of properties in longitudinal direction ΔTS 20 MPa or less, low ratio of yield strength to ultimate strength of 80 % or less and high strength, id est, yield strength YS 379-552 MPa and ultimate tensile strength TS 655 MPA or higher.12 cl, 3 tbl, 2 dwg

Cast iron for making core of double-layer rolls // 2605048
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, particularly to compositions of cast iron, and can be used to make a core of double-layer rolls. Cast iron for core of double-layer rolls contains, wt%: carbon 3.0-3.3, silicon 1.3-1.8, manganese 0.3-0.6, phosphorus up to 0.12, sulphur up to 0.05, chrome 0.1-0.2, nickel 0.5-1.0, copper 0.1-0.4, iron - balance, at carbon equivalent within range of 3.7-3.8.EFFECT: higher hardness and strength forming tool.1 cl, 2 tbl

ethod for production of high-strength hot-rolled steel // 2605037
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, specifically to production of high-strength hot-rolled steel, used for making articles for petrochemistry and high-speed transport operating in extreme conditions, as well as base layer of bimetallic structures. Workpiece is produced from steel containing following component ratio, wt%: carbon 0.16-0.45, silicon 0.05-0.70, manganese 0.50-1.50, sulphur 0.002-0.008, phosphorus not more than 0.015, chromium not more than 0.15, nickel not more than 0.15, copper not more than 0.15, niobium from 0.005 to less than 0.01, acid-soluble aluminium 0.02-0.05, iron and unavoidable impurities - balance, wherein content of manganese and sulphur is linked by relationship [Mn]·[S] < 0.005. Workpiece is heated to temperature within range from more than 1,250 to 1,300 °C and subjected to hot rolling.EFFECT: obtained rolled product has high strength properties.1 cl, 2 tbl
 
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