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

C   Chemistry; metallurgy(315514)
C22            etallurgy; ferrous or non-ferrous alloys; treatment of alloys or non-ferrous metals(28213)
ethod of manufacture of products from pseudo-alloys molybden-copper // 2628233
FIELD: metallurgy.SUBSTANCE: method includes preparing the molybdenum charge, pressing the preform, sintering the preform to form a porous framework, contacting the side of the resulting preform with copper taken in excess, impregnating the preform with copper, and cooling it. The impregnated workpiece is cooled from the impregnation temperature to the crystallization temperature of copper. In the impregnated workpiece, a temperature gradient is created directed toward the area of the excess copper location from the opposite side of the workpiece, to allow the blank to cool from the side opposite to that region of excess copper.EFFECT: increase in the relative density of products and the absence of anisotropy of physical properties.2 ex
ethod of producing titanium powder // 2628228
FIELD: metallurgy.SUBSTANCE: method involves loading sponge titanium into a retort, vacuuming and heating it in a vacuum, feeding hydrogen to the retort with hydrogenation of the sponge titanium while cooling the retort, extracting the hydrogenated sponge titanium from the retort, grinding it and sieving it into fractions, charging the crushed hydrogenated titanium powder in the retort, dehydrogenating it, cooling the retort and extracting the titanium powder. Hydrogen is fed into the retort at a speed of not more than 360 m3/hour per 1m2 of the retort section with the provision of an excess hydrogen pressure in the retort of not more than 44 kPa. The hydrogenated sponge titanium is ground in an argon atmosphere at an excess pressure of not more than 10-20 kPa, and the dehydrogenation is carried out by sealing the retort, evacuating it to a residual pressure of 0.01 kPa, heating and supplying argon at an overpressure of 10-30 kPa, wherein hydrogen released during dehydrogenation together with argon with a residual pressure of 0.01 kPa and a thermal aging is carried out for 3-5 hours.EFFECT: production of titanium powder of a given shape, fragmentation, needle type, with a reduced content of gas impurities such as hydrogen, nitrogen, chlorine and oxygen is ensured.2 cl

Hot-pressed thick-sheet steel, product moulded by stamping, and method of manufacturing products moulded by stamping // 2628184
FIELD: metallurgy.SUBSTANCE: steel contains, wt %: C: 0.15 to 0.5, Si: 0.2 to 3, Mn: 0.5 to 3, P: 0.05 or less (except 0), S: 0.05 or less (except 0), Al: 0.01 to 1, B: of 0.0002 to 0.01, N: 0.001 to 0.01%, Ti: in the amount equal to or greater than 3.4[N]0.01% and equal to or less than 3.4[N]0.1%, where [N] is the content (wt %) N, the rest are iron and unavoidable impurities. The average diameter of the equivalent circle of Ti-containing inclusions having an equivalent circle diameter of 30 nm or less among the Ti-containing inclusions contained in the steel sheet is 3 nm or more. The amount of Ti in the inclusions and the total amount of Ti in the steel satisfy the ratio: (the amount of Ti in the inclusions (wt %)-3.4[N])≥0.5×[(total amount of Ti (wt %))-3.4[N]], where [N] is the content (wt %) N in the steel. The share of ferrite in the metallographic microstructure is 30% or more.EFFECT: required balance between high strength and elasticity is provided.6 cl, 1 dwg, 16 tbl, 2 ex
Extraction of basic metals from sulfide ores and concentrates // 2628183
FIELD: chemistry.SUBSTANCE: process comprises the steps of mixing the ore-containing base metal with the ferric salts. Base metals are preferably copper, nickel and zinc. The mixture is then heated, water is added to form a slurry, mixed and the slurry is filtered.EFFECT: increasing the efficiency of extraction of the specified metals at processing of ores and concentrates with the low maintenance of sulfides.10 cl, 3 tbl, 3 ex
ethod of extracting rhenium from uranium solutions // 2627838
FIELD: metallurgy.SUBSTANCE: method of extracting rhenium from uranium-containing solutions involves the sorption of rhenium by a weakly basic nanostructured ion exchanger on a styrene acrylate matrix containing cyclohexylamine functional groups in an amount of 1.9-3.0 meq/g.EFFECT: increasing selectivity of rhenium extraction with respect to uranium, reducing sorption-desorption stages during purification of eluted rhenium solutions from uranium, improving sorption-desorption characteristics of technical and economic parameters of sorption extraction of rhenium from uranium-containing solutions.2 cl, 4 tbl, 4 ex

ethod of complex processing of pyritic raw materials // 2627835
FIELD: metallurgy.SUBSTANCE: method of complex processing comprises roasting of the dried pyritic raw materials at a temperature of 680÷725°C in a stream of air, depleted in oxygen content by adding nitrogen, and three consequent chloride leachings: hydrochloric-acid, chloride in the presence of atmospheric oxygen and chloride in the presence of strong oxidants in the form of hypochlorite, chlorine, chlorine dioxide, nitric acid, ozone. Wherein this process is performed using closed material flow systems, including regenerated hydrochloric acid and water, as well as the use of heat emitted at the various stages of the process. This allows to refer the proposed method to energy efficient and environmentally safe technologies.EFFECT: obtaining liquid standard commodity products from the main components of pyritic raw materials.6 dwg, 3 tbl, 2 ex
Wear-resistant heavy plates with excellent low-temperature impact strength and method of their production // 2627830
FIELD: metallurgy.SUBSTANCE: steel has a chemical composition containing in wt %: C: 0.10 to less than 0.20, Si: 0.05 to 0.5, Mn: 0.5 to 1.5, Cr: 0.05 to 1.20, Nb: from 0.01 to 0.08, B: 0.0005 to 0.003, Al: 0.01 to 0.08, N: 0.0005 to 0.008, P: not more than 0.05, S: not more than 0.005, O: not more than 0.008, the rest is Fe and unavoidable impurities. Brinell hardness of steel (HBW10/3000) is 361 or more, and the microstructure contains fine precipitate with a diameter of 50 nm or less with a density of 50 or more per 100 mcm2. The microstructure of the steel from the surface to the depth of at least 1/4 of thickness of the plate is a rack martensite with an average grain size of not more than 20 mcm, the average grain size is the average size of crystalline grains surrounded by large-angle grain boundaries having a difference in orientation of 15° or more.EFFECT: steel has high hardness and low-temperature impact strength.17 cl, 2 dwg, 2 tbl
Wear-resistant sheet steel with excellent low-temperature impact strength and resistance to hydrogen attack and method of its manufacture // 2627826
FIELD: metallurgy.SUBSTANCE: steel contains, wt %: C: 0.20 to 0.30, Si: 0.05 to 0.5, Mn: 0.5 to 1.5, Cr: 0.05 to 1.20, Nb: 0.01 to 0.08, B: 0.0005 to 0.003, Al: 0.01 to 0.08, N: 0.0005 to 0.008, P: not more than 0.05, S: not more than 0.005 and O: not more than 0.008, the rest is Fe and unavoidable impurities. Brinell hardness of steel (HBW10/3000) is 401 or more, and the microstructure contains fine precipitate with a diameter of 50 nm or less with a density of 50 or more particles per 100 mcm2. The microstructure of the steel from the surface to the depth of at least 1/4 of the thickness is a rack martensite with an average grain size of not more than 20 mcm, the average grain size is the average size of crystalline grains surrounded by large-angle grain boundaries having a difference in orientation of 15° or more.EFFECT: steel sheets have high low-temperature impact strength and resistance to hydrogen attack.17 cl, 2 tbl
Cast iron for grinding bodies // 2627713
FIELD: metallurgy.SUBSTANCE: grinding bodies are made of low-alloyed white iron, containing, wt %: C 3.2-3.6, Si 1.2-1.8, Cr 0.8-1.2, Mn 0.3-0.8, Ni 0.3-0.4, S <0.15, P <0.15, Fe - the rest.EFFECT: production of grinding bodies, having simultaneously increased impact and wear resistance, when working under impact and abrasive wear.3 tbl
ethod for producing cathode alloy based on metal of platinum group and barium // 2627709
FIELD: metallurgy.SUBSTANCE: method for producing a cathode alloy based on metal of the platinum group and barium includes pressing a weighed portion of a platinum group metal powder, cleaning the barium surface from oxides, combining the arc alloy of the compact and barium in an argon atmosphere using a non-consumable tungsten electrode. Before pressing the weighed portions of the platinum group metal powder, (25-70)% of the powder weighed portion is mechanically activated for 5-20 minutes, and the remainder of the powder weighed portion is mixed.EFFECT: improving the homogeneity of the intermetallic compound phase distribution in the platinum group metal matrix.2 tbl, 2 ex
ethod of producing pressed metal-alloy palladium-barium cathode // 2627707
FIELD: metallurgy.SUBSTANCE: intermetallide Pd5Ba is produced by melting, is ground in an atmosphere of inert gas or CO2 to obtain a powder, the resulting powder is mixed with palladium powder and mechanically activated by the planetary or vibrator mill for 5-15 minutes. The powder obtained after mechanoactivation is compressed, and the compact is sintered in an argon atmosphere in a beam of fast electrons at a temperature of (700-800)°C for 25-40 minutes.EFFECT: increasing the coefficient of secondary electron emission of the pressed metal-alloy cathodes Pd-Ba.2 tbl, 2 ex
Cast high-boron alloy // 2627537
FIELD: metallurgy.SUBSTANCE: alloy contains, wt %: carbon 0.2-0.5, silicon 0.7-1.3, manganese 4.0-6.0, boron 3.0-3.5, cobalt 3.0- 3.5, aluminium 0.6-0.8, tungsten 0.9-1.3, iron is the rest.EFFECT: alloy has increased hardness.1 tbl
Frictional material on iron base // 2627535
FIELD: metallurgy.SUBSTANCE: iron-based frictional material contains, wt %: copper 10.0-15.0; carbon 7.0-9.0; silica 2.0-4.0; asbestos 3.0-5.0; barium sulfate 4.0-5.0; silicon nitride 6.0-8.0; iron is the rest.EFFECT: wear resistance of the frictional material is increased.1 tbl
Sintered antifriction material on cobalt base // 2627534
FIELD: metallurgy.SUBSTANCE: sintered cobalt based antifriction material, wt %: titanium carbide 1.0-2.0; molybdenum disulphide 10.0-16.0; chromium 20.0-30.0; alumina 6.0-10.0; cobalt is the rest.EFFECT: material is characterised by high wear resistance at elevated temperatures.1 tbl
Corrosion-resistant steel // 2627533
FIELD: metallurgy.SUBSTANCE: steel contains, wt %: carbon 0.01-0.02, silicon 0.1-0.2, manganese 0.1-0.5, chromium 27.0-29.0, molybdenum 1.0- 3.0, yttrium 0.01-0.08, tantalum 0.15-0.3, copper 0.1-0.2, iron is the rest.EFFECT: increased corrosion resistance of steel.1 tbl
Nickel-based alloy // 2627532
FIELD: metallurgy.SUBSTANCE: nickel-based alloy contains, wt %: carbon 0.02-0.1; chromium 20.0-25.0; tungsten 3.0-5.0; aluminium 0.2-0.7; a group element consisting of lanthanum and neodymium 0.01-0.1; molybdenum 15.0-18.0; tantalum 0.5-1.0; nickel is the rest.EFFECT: alloy is characterised with high heat stability.1 tbl
Hard alloy // 2627531
FIELD: metallurgy.SUBSTANCE: invention relates to compositions of solid sintered alloys based on tungsten carbide, which can be used to make cutters, mills and other tools. The hard alloy contains, wt %: tungsten carbide 62.0-64.0; titanium carbide 39.5-41.5; cobalt 3.0-3.5; chromium 3.0-3.5.EFFECT: enhanced hardness of the alloy.1 tbl
Alloy for alloying cast iron // 2627530
FIELD: metallurgy.SUBSTANCE: alloy for alloying cas iron contains, wt %: chrome 15.0-20.0; silicon 10.0-15.0; aluminium 5.0-10.0; manganese 3.0-4.0; carbon 1.0-1.5; tellurium 0.2-0.4; boron 1.6-2.0; nickel 10.0-15.0; silver 3.0-4.0; iron is the rest.EFFECT: increased mechanical properties of cast iron alloyed with the claimed alloy.1 tbl
Steel // 2627529
FIELD: metallurgy.SUBSTANCE: steel contains, wt %: carbon 0.2-0.3; manganese 0.5-0.8; silicon 0.8-1.2; chromium 4.5-5.5; calcium 0.001-0.002; titanium: 0.01-0.02; yttrium 0.06-0.1; cobalt 2.5-3.2; rhenium 0.1-0.16; copper 2.2-2.6; iron is the rest.EFFECT: steel is characterized by high heat stability.1 tbl
ethod for producing calcium fluoride from fluorocarbon-containing waste of aluminium production // 2627431
FIELD: chemistry.SUBSTANCE: method for producing calcium fluoride from fluorocarbon-containing wastes of aluminium production involves treatment of fluor-containing solutions with calcium hydroxide, followed by separation of the solution and a pulp and liberation of calcium fluoride, which is washed with water. As a fluor-containing solution, a solution is used, obtained by leaching solid fine-dispersed fluorocarbon-containing waste of electrolytical aluminium production - sludge from gas cleaning, dust from electrostatic precipitators and spent coal lining. Fluorocarbon-containing wastes are submitted for treatment in a ratio of T:H=:(10-11) with respect to a 2-2.5% solution of sodium hydroxide. The treatment is carried out at a leach solution temperature of 65-85°C.EFFECT: invention makes it possible to produce calcium fluoride from solid fine-dispersed fluorocarbon-containing waste of electrolytic aluminium production with a fluor content in the solid phase of 12 to 25 percent.2 cl, 4 tbl
Wear-resistant cast iron with spherical graphite // 2627316
FIELD: metallurgy.SUBSTANCE: invention relates to spheroidal graphite cast iron for the production of parts intended for use in shock abrasive wear at temperatures up to 500°C, in particular machine parts for the manufacture of asphalt, concrete, and the like. Wear resistant cast iron with nodular graphite contains, wt %: Carbon 2,8-4,0; Silicon 1,5-3,5; Vanadium 3.0-8.0; Copper 0.2-0.8; Nickel 3.0-5.0; Manganese 0.2-1.0; Magnesium 0.02-0.1; Aluminium 0.1-0.44; Cerium 0.03-0.20; Calcium 0.05-0.20; Boron 0,2-0,4; Niobium 0.5-2.0; Iron - the rest.EFFECT: creation of wear-resistant cast iron with nodular graphite with high hardness and strength in the cast state, without the use of heat treatment, for operation in shock-abrasive wear to a temperature of 500°C.1 tbl

Swaged steel, cold-rolled steel sheet and method for the production of swaged steel // 2627313
FIELD: metallurgy.SUBSTANCE: steel contains, wt %: C - 0.030-0.150, Si - 0.010-1.00, Mn - 0.50- less than 1.50, P - 0.001-0.060, S - 0.001-0.010, N - 0.0005-0.0100, Al - 0.010-0.050 and optionally one or several of the following elements: B - 0.0005-0.0020, Mo - 0.01-0.50, Cr - 0.01-0.50, V - 0.001-0.100, Ti - 0.001-0.100, Nb - 0.001-0.050, Ni - 0.01-1.00, Cu - 0.01-1.00, Ca - 0.0005-0.0050, rare-earth metals - 0.0005-0.0050, iron and unavoidable impurities making the rest. The microstructure of the steel contains from 40% to 95% by the share of the ferrite area and from 5% to 60% by the share of martensite, and also, if necessary, one or more of the following phases: 10% or less perlite, 5% or less of residual austenite by volume fraction and less than 40% by the proportion of bainite area. The amount of the share of the ferrite area and the share of martensite is 60% or more.EFFECT: steel has high formability, high chemical conversion treatment properties and coating adhesion.20 cl, 8 dwg, 5 tbl

Titanium alloy with improved properties // 2627312
FIELD: metallurgy.SUBSTANCE: production method of the titanium alloy blank includes the steps at which the titanium alloy ingot is obtained, including wt %: from 6.0 to 6.7 aluminium, from 1.4 to 2.0 vanadium, from 1.4 to 2.0 molybdenum, from 0.20 to 0.42 silicon, from 0.17 to 0.23 oxygen, up to 0.24 iron, up to 0.08 carbon, titanium and unavoidable impurities remained, perform the first heat treatment of the alloy at the temperature of 40 and 200 Celsius degrees above the beta-transus temperature and forging. Then, the second heat treatment is carried out at the temperature of 30-100 Celsius degrees below the beta-transus, the alloy rolling into the plate, bar, or flat bar and provide annealing at the temperature below the beta transus.EFFECT: received blanks have high strength, durability characteristics at low cycle fatigue.21 cl, 11 dwg, 4 tbl

Intermetallide titanium-based alloy and product thereof // 2627304
FIELD: metallurgy.SUBSTANCE: invention can be used for manufacturing parts of aviation and space equipment, long-working up to 700°C. The intermetallide titanium-based alloy contains, wt %: aluminium 10.5-12.5, niobium 38.5-42.0, molybdenum 0.5-1.5, vanadium 0.5-2.0, zirconium 1.0-2.5, tungsten 0.3-1.5, tantalum 0.1-0.8, silicon 0.1-0.25, yttrium 0.02-0.6, titanium and impurities - the rest.EFFECT: plasticity at room temperature and heat resistance at temperatures up to 700 degrees increase.3 cl, 1 dwg

Recovery method of gold factories waste pulpes // 2627141
FIELD: oil and gas industry.SUBSTANCE: method involves saturation of the waste pulps with electrolytic gases and electroflotation in the electroflotation strings. The resulting froth pulp is sent to the hydrometallurgical processing. The depleted secondary residues, oxygenated and activated during the electroflotation, containing the underoxidized suspended mineral particles, are subjected to thickening. The sewages formed after the thickening is subjected to electrosorption in two stages. Initially, the industrial precious metals and toxic elements for biota are isolated. At the second stage, the colloidal gold is sorbed with the help of anion exchangers, prepared in CN- and OH- forms. The final solution obtained after the electrosorption is conditioned by pH and after addition of the appropriate complexing agents, it is directed to mine and/or heap leaching.EFFECT: costs reduction.1 dwg, 1 ex
Copper-based sintered friction material // 2627138
FIELD: metallurgy.SUBSTANCE: material contains 5-8% wt % of tin, 5-7 wt % of graphite, 15-20 wt % of steel powder PH-30 and the rest - copper.EFFECT: increasing the coefficient of friction and increasing the stability of the frictional torque, reducing the sintering temperature, increasing the specific pressure during operation.1 tbl

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

Thermomechanical processing of nickel-titanium alloys // 2627092
FIELD: metallurgy.SUBSTANCE: manufacturing method of the nickel-titanium rolled product involves hot forging of the ingot at the temperature greater than or equal to 500°C with producing the billet, hot rod rolling of the billet at the temperature greater than or equal to 500°C to produce the blank, cold drawing of the blank at the temperature of less than 500°C with producing the bar and hot isostatic pressing (HIP) for at least 0.25 hours in the HIP furnace, operating at the temperature in the range from 700°C to 1,000°C and pressure in the range from 3,000 pounds per sq. inch (20.7 MPa) up to 50,000 pounds per sq. inch (344.7 MPa).EFFECT: density of non-metallic inclusions per unit area decreases, which ensures the high surface quality, and high fatigue life of the product.27 cl, 8 dwg, 10 tbl, 5 ex
Product from al-cu-li-alloy suitable for use in aircraft and aerospace engineering // 2627085
FIELD: metallurgy.SUBSTANCE: invention relates to the products of an aluminium alloy of the type Al-Cu-Li and can be used as structural components in aircraft, aerospace, etc. 1. An aluminium alloy product comprising, by wt %: Cu 3.4-5.0, Li 0.9-1.7, Mg 0.2-0.8, Ag 0.1-0.8, Mn 0.1-0.9, Zn <0 1, Zr 0.05-0.3, Cr 0.05-0.3, 0.03-0.3 Ti, Sc 0.05-0.4, optionally Hf 0.05-0.4, Fe <0.15, Si <0.5, aluminium and unavoidable impurities. The product manufacturing method of the aluminium alloy includes moulding the preform, heating and/or homogenizing the cast billet, hot working pressure, optionally cold working, heat treatment for solid solution (TSS), wherein the TSS is carried out at a temperature and time sufficient to place into solid solution soluble components in the aluminium alloy, cooling the TSS billet optionally treating the cooled TSS billet to relieve stresses and aging.EFFECT: preparation of products made of aluminium alloys with high fracture toughness and high strength.14 cl, 3 tbl, 1 ex
Plated high-strength corrosion-resistant steel // 2627080
FIELD: metallurgy.SUBSTANCE: plated steel consists of the cladding layer, made of corrosion-resistant austenitic steel and the base layer made of low-carbon, high-strength, microalloyed steel. The main layer steel contains the components in the following ratio, wt %: C 0.070-0.120, Si 0.10-0.50, Mn 0.5-2.0, P ≤0.03, S ≤0.005, Al 0.015-0.09, Nb 0.04-0.08, Ti 0.02-0.04, Cr ≤0.50, N ≤0.01, V 0.03-0.06, B 0.002-0.005, iron and unavoidable impurities are the rest. The titanium and nitrogen, niobium and carbon contents are related by the formula: [Ti]/[N] = 4-8 and [Nb]⋅[C] = 0.004-0.008. The steel has continuity and strength of joining layers - at least 450 N/mm2, the strength - not less than 850 N/mm2, the cold resistance KCU-70°C - not less than 80 J/cm2, the corrosion resistance, the weldability and ductility.EFFECT: required complex of technological and service properties is provided.2 tbl
ethod of manufacture of high-strengthen corrosive-resistant hot-rolled steel with low specific weight // 2627079
FIELD: metallurgy.SUBSTANCE: blank is prepared from steel containing mass. %: Carbon 0.03-0.07, Silicon 0.5-0.8, Manganese 0.4-0.7, Sulfur no more than 0.01, Phosphorus 0.005-0.015, Aluminium 8.0-11.0, Chromium 6.0-10.0, Nickel 0.005-0.03, Molybdenum 1.01-2.0, Titanium 0.01-0.03, Vanadium 0.05-0.07, Niobium not more than 0.06, Nitrogen 0.005-0.05, Iron and unavoidable impurities are the rest, the sum of [Cr+Al] wt % = 14.1-18, the blank is heated in the range from 1100°C to 1300°C, milling is conducted in at least five stages with a reduction ratio in each step from 10% to 25%, the time between two subsequent milling stages not exceeding 9 s, and the milling end temperature of 810-890°C, then the resulting strip is cooled to ambient temperature.EFFECT: increasing the strength and corrosion resistance of the strip while maintaining low specific gravity.2 tbl
Uranium sorptive extraction method from sulphuric acid solutions and pulps // 2627078
FIELD: metallurgy.SUBSTANCE: uranium sorptive extraction method from sulfuric acid solutions and pulps is that the uranium sorption is carried out on the anionite exchanger of commixed basicity. Then the saturated anion exchanger is treated with 1.5-3.0% solution of H2SO4 at the anion exchanger ratio: solution of 1:1.5-2.0 and uranium is desorbed with 75-100 g/l of Na2CO3 at duration of 4-6 hours and the anion exchanger ratio of 1:2-3.EFFECT: reduction of energy and material costs, simplification of the process and increase of its efficiency.1 tbl, 1 ex

High-strength multi-phase steel and method for strip manufacture from this steel with minimum tensile strength at 580 mpa // 2627068
FIELD: metallurgy.SUBSTANCE: invention relates to the high-strength multi-phase steel with the minimum tensile strength 580 MPa, preferably with two-phase structure, to manufacture the cold-rolled or hot-rolled steel strip with thickness 0.50-4.00 mm with improved moulding properties, used, in particular, for automotive industry with the lightweight structures use. Steel consists of elements, wt %: C from 0.075 to ≤0.105, Si from 0.600 to ≤0.800, Mn from 1.000 to ≤2.250, Cr from 0.280 to ≤0.480, Al from 0.010 to ≤0.060, P ≤0.020, N ≤0.0100, S ≤0.0150, the rest - iron, due to the impurity melting. With the strips thickness up to 1 mm the content of Mn is preferably ≤1.500%, with the strips thickness from 1 mm up to 2 mm, the content of Mn is preferably ≤1.750%, and with the strips thickness ≥2 mm, the Mn content is preferably ≥1.500%.EFFECT: uniform mechanical and technological strips properties and its suitability for the hot-dip galvanizing.17 cl, 8 dwg, 4 ex
ethod to produce modified addition alloys neodymium-iron for constant magnets neodymium-iron-borium // 2626841
FIELD: metallurgy.SUBSTANCE: modifier in the form of nanodispersed mechanically activated neodymium oxide powder, iron clad, with the particle size 50-100 nm, in the amount of 0.03-0.07 wt % of the stock mass, is introduced into the stock melting in the furnace, provide the holding of the resulted addition alloy melt, after which the melt is poured into the mould, the heating temperature of which is 100-200°C.EFFECT: invention makes it possible to produce the permanent magnets with higher magnetic properties due to producing the addition alloy with the fine crystalline granular structure.1 dwg
Silver-based alloy // 2626837
FIELD: metallurgy.SUBSTANCE: alloy based on silver includes, wt %: copper 18.0-21.0; nickel 9.0-11.0; indium 3.0-3.5; gallium 0.5-1.5; zirconium 1.5-2.5; silver 62.0-66.5.EFFECT: improvement of silver properties.1 cl
Zinc solder for aluminium solding // 2626835
FIELD: metallurgy.SUBSTANCE: solder contains components in the following ratio, wt %: aluminium 2-7, copper 1-3, silicon 0.01-0.03, tin 0.01-0.2, zirconium 0.01-0.08, the rest is zinc. To produce said solder, zinc and aluminium are melted with addition of copper-aluminium master alloy and silicon-aluminium master alloy at a flow rate up to the required copper, silicon and aluminium contents. Then, 0.01-0.2% tin is mixed in the melt and cooled to 600-650°C. The molten solder is mixed with the flux from the fused mixture of salts in the form of potassium chloride 60-62% and potassium fluoride 38-40% at a rate of 0.1-0.5% by solder weight with addition to the mixture of potassium fluorozirconate at a flow rate of 0.04-0.3% of the solder weight.EFFECT: introduction of zirconium provides soldering with high spreadability in aluminium, the zinc alloy has the ability to deform by rolling or pressing compression to obtain a solder that is convenient for soldering with a gas burner.2 cl, 3 dwg, 1 tbl, 3 ex
Bearing with sliding layer // 2626790
FIELD: machine engineering.SUBSTANCE: bearing with the sliding layer consists of the shape-generating body, with the antifriction bearing alloy on the basis of the copper or aluminium and the galvanic sliding layer, made from the material containing tin, antimony and copper. Tin with antimony in the amount of 0.5…4.9 wt % form the matrix as the solid solution with the addition of cadmium in the amount of 0.5…2.5 wt %, and copper with tin forms the compound Cu6Sn5, distributed in this matrix in the form of more solid copper-tin particles, with total copper content in alloy 2…25 wt %. The lead impurity content does not exceed 0.25% and the total impurity content of the remained elements does not exceed 1%.EFFECT: creation of the sliding layer bearing with improved operating characteristics.1 cl
End plate for containers of hot isostatic pressing, container of hot isostatic pressing and method of hot isostatic pressing // 2626697
FIELD: machine engineering.SUBSTANCE: end plate for the container comprises a central region and a main region extending radially from the central region and ending at a corner along the perimeter of the end plate with the edge of the container. The thickness of the end plate increases from the central area to the corner along the perimeter of the end plate and determines the taper angle. The inner surface of the corner along the perimeter of the end plate is made with a rounded part providing a smooth transition of the main area to the edge of the perimeter. The container comprises a cylindrical body portion and two end plates. A method of hot isostatic pressing using the container is also provided.EFFECT: eliminating the shortage of cylindrical containers, consisting in the difficult cleaning of its internal volume after assembly, and improving the filling of the container and enhancing the efficiency of vacuum degassing.21 cl, 15 dwg
ethod of producing aluminium from bauxite or its sludge // 2626695
FIELD: chemistry.SUBSTANCE: method comprises grinding of mixture to produce a powder and calcination of the mentioned powder at a temperature ranging from 600°C to 800°C to produce basic calcined material, containing aluminium oxide and optionally at least one oxide selected from the group consisting of titanium oxide and iron oxide, mixing of the basic calcined material with a carbonaceous material to produce a mixture; carbochlorination of the mixture with chlorine gas at a temperature ranging from 600°C to 1000°C to produce a gas stream, containing aluminium chloride and optionally at least one chloride selected from the group consisting of iron (III) chloride and titanium chloride, condensation of the gas stream to produce chloride condensate, comprising aluminium chloride optionally at least one chloride selected from the group cosisting of iron (III) chloride and titanium chloride, optionally comprises processing of the chloride condensate for fractional separation of aluminium chloride and optionally at least one chloride selected from the group consisting of iron (III) chloride and titanium chloride, and carrying out of aluminium chloride electrolytic process in electrolysis cell to produce metallic aluminium.EFFECT: lowered carbon dioxide and perfluorocarbon gases emissions and increased energy efficiency of the process.12 cl, 2 ex

ethod of processing metallurgical production waste // 2626371
FIELD: metallurgy.SUBSTANCE: iron and zinc-containing dust, milling scale, carbonaceous reducing agent and slag forming components are mixed, agglomerated, dried and heat-treated in a rotary-hearth kiln. Zinc sublimations are captured, the exhaust gases are cooled. Oxidation and condensation of zinc oxide in the form of dust and trapping of dust containing zinc oxide are carried out. Granulated cast iron and slag are cooled and separated. The ratio of dust and scale is set to provide total iron content in the mixture of at least 50%. The slag forming components are introduced in an amount providing the basicity of CaO/SiO2 in range of 0.6-1.6 and the sulfur content in cast iron is not more than 0.09. The carbonaceous reductant is introduced in an amount providing carbon content in the cast iron ranging from 1.0 to 4.5%. Heat treatment is carried out by two-stage heating: at 1200-1300°C, then at a temperature increased by 80-200°C.EFFECT: increasing the content of zinc oxide in concentrate extracted from dust and scale, obtaining cast iron with metallic iron content of 94 percent or more, reducing the consumption of reducing agent and fuel.3 cl, 1 dwg, 1 tbl, 1 ex

Composite liquid material for arc electric shops // 2626368
FIELD: metallurgy.SUBSTANCE: charge material for electric arc furnaces consists of disperse iron-containing wastes of metallurgy and engineering and a carbonaceous binder that does not contain sulfur. The said waste contains oxidized and/or reduced iron with a ratio between them in the range of 1:0 to 0:1, and the ratio between mentioned waste and the binder is 0.7:0.3 to 0.2:0.8.EFFECT: invention provides for the recycling of disperse wastes of metallurgy and engineering, which include metal iron, carburization of a metal bath of an electric arc furnace and energy savings.1 tbl

ethod of deactivating ores, ore and technogenic concentrates // 2626264
FIELD: chemistry.SUBSTANCE: invention can be used in processing of ores, ore and technogenic concentrates for their deactivation from impurities of radioactive isotopes: 232Th, 238U, 235U, 234U, 228Th, 230Th, 224Ra, 226Ra, 228Ra. The method comprises treating the lixiviant solution to produce a pulp consisting of a solid and a liquid phase, separating by filtration of the liquid phase from the solid phase consisting of insoluble concentrate residues. Further, the extraction of radionuclides from the liquid phase is carried out. At the same time, sulfuric acid with a concentration of 20-95 wt % is used as the lixiviant at the ratio of T:H=1:(1.5-3) at the temperature of 70-300°C for 2-6 hours Selective extraction of radionuclides from the liquid phase is carried out in three stages, in the first stage by precipitation of double REE sulfates and sodium or stepwise neutralisation, in the second stage - by coprecipitation, in the third stage - by ion exchange.EFFECT: invention allows to increase the efficiency of the deactivation process and to ensure the conditions for deactivation of all ores, ore and technogenic concentrates.7 cl, 2 dwg, 10 tbl, 5 ex
ethod of manufacture of bimetallic wire from precious metals // 2626260
FIELD: metallurgy.SUBSTANCE: method of manufacturing a bimetallic wire made of precious metals containing a core and a shell includes rolling a bimetallic semi-finished product. A silver rod is used as the core, and as a casing, a ribbon made from a 585-alloy gold alloy containing, wt %, gold 58.0-59.0, silver 7.5-8.5, iridium 0.001- 0,05, rhodium 0,001-0,1, copper - the rest. The rolled strip is folded around the core provided that the cross-sectional areas of the core and the bimetallic half-finished product are 0.27-2.6, the bimetallic semi-finished product is subjected to long rolling without preheating, followed by drawing.EFFECT: increasing the mechanical and operational characteristics of finished products.2 tbl, 2 dwg
Cast iron // 2626258
FIELD: metallurgy.SUBSTANCE: cast iron contains, wt %: carbon 2.5-3.0; silicon 1.2-1.7; manganese 0.4-0.8; aluminium 1.5-2.5; cerium 0.08-0.11; chromium 0.2-0.4; magnesium 0.008-0.014; rhenium 0.02-0.03; copper 1.6-2.2; cobalt 0.3-0.5; beryllium 0.008-0.014; iron - the rest.EFFECT: increasing cast iron strength.1 tbl
Processing method of sulphide pyrrhotine-pentlandite concentrates containing precious metals // 2626257
FIELD: metallurgy.SUBSTANCE: for carrying out the leaching process of pentlandite-pyrrhotite concentrate at a temperature of 90-105°C with the feeding of sulfuric acid and sodium sulfate into the autoclave, the oxygen partial pressure is increased from more than 0.5 to 1.5 MPa. The oxidated pulp is delivered for separation to solid and liquid phases. The metal containing solution is sent for processing, and solid phase - for floatation, during it sulfur sulphide concentrate and tails of dump quality are produced, to them maximum 5% of non-ferrous and maximum 5-15% of precious metal are transferred. The method is applicable for the leaching of pyrrhotite-pentlandite concentrates at any nickel content in the range of 0.5-20%.EFFECT: intensification of the leaching process.2 cl, 3 tbl, 3 ex
Ligature // 2626256
FIELD: metallurgy.SUBSTANCE: ligature contains, wt %: aluminium 25.0-35.0; Nickel 15.0-20.0; Molybdenum 8.0-10.0; Iron 3,0-5,0; REM 0.5-1.0; Zirconium 15.0-25.0; Copper - the rest.EFFECT: increase the strength of bronze compositions.1 tbl
ethod of extracting scandium from concentrates of rare-earth elements // 2626206
FIELD: chemistry.SUBSTANCE: invention can be used in technology of selective extracting scandium from concentrates of rare-earth elements (REE). The method for extracting scandium from concentrate of rare-earth elements in the form of an aqueous solution comprises contacting an aqueous solution containing scandium nitrate, REE nitrates, lithium trichloroacetate with a concentration of 1.0-2.0 mol/l with an extractant for 3 minutes. As an extractant, a solution of benzo-15-crown-5 in chloroform is used, and the extraction process is carried out at pH of 3.0-5.0.EFFECT: increasing the coefficients of metal separation and the possibility of carrying out a process of selective extracting scandium from neutral concentrated solutions of REE nitrates before conducting their group separation processes according to a standard process scheme.2 cl, 4 ex

ethod of increasing filtrumeness of pulp in sulfuric acid processing of evdialite concentrate // 2626121
FIELD: chemistry.SUBSTANCE: invention can be used to produce rare metals (R3M). The method of extracting rare-earth elements and zirconium during the processing of eudialyte concentrate includes treatment of the eudialyte concentrate with sulfuric acid supplemented with sodium fluoride. Next, the separation is carried out by filtering the insoluble precipitate, washing it, and feeding the solution after washing and acid opening to a separation of the extraction separation of REE and zirconium cations. When sodium fluoride is added to the molar ratio F: Zr=3, the amorphous structure of silica gel breaks down.EFFECT: improved pulp filterability without loss of recovery of zirconium and rare metals.1 dwg, 1 ex
Casting heat resistant nickel-based alloy // 2626118
FIELD: metallurgy.SUBSTANCE: invention relates to casting heat-resistant nickel-based alloys used for the manufacture of high-loaded parts of gas turbine engines and plants, namely, working and nozzle blades of gas turbines with a directional columnar and single crystal structure operating at the temperatures of 1000°C and higher. Casting heat-resistant nickel-based alloy contains, wt %: chromium 4.0-9.0; cobalt 9.0-14.0; tungsten 7.0-10.0; molybdenum 1.0-5.0; aluminium 4.0-6.0; tantalum 6.0-10.0; hafnium 0.1-1.0; carbon 0.002-0.1; yttrium 0.001-0.1; lanthanum 0.001-0.1; cerium 0.001-0.1; silicon 0.01-0.2; manganese 0.01-0.3; boron 0.005-0.03; scandium 0.0002-0.01; nickel - the rest.EFFECT: specific gravity of the alloy decreases while maintaining a high level of heat resistance.3 tbl, 1 ex
Hydrometallurgical method using multi-stage nanofiltration // 2626112
FIELD: chemistry.SUBSTANCE: nanofiltration, in which valuable metal is extracted from ores or wastes through leaching using a suitable leaching agent, is used. The process requires at least two subsystems of nanofiltration. In this process, the raffinate from the metal extraction process is treated with a solvent in the first nanofiltration subsystem, after which the permeate is combined therefrom with the rich solution stream and processed in a second nanofiltration subsystem.EFFECT: achieved benefits in terms of the number of regenerated leaching agent for the necessary raw materials is obtained, in respect of installation and size in relation to the total cost.15 cl 8 dwg
 
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