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

C   Chemistry; metallurgy(312744)
C22            etallurgy; ferrous or non-ferrous alloys; treatment of alloys or non-ferrous metals(27704)
Titanium-based alloy and product made from it // 2614356
FIELD: metallurgy.SUBSTANCE: titanium-based alloy contains, wt %: aluminium 1.5-4.5;. vanadium 13.5-19.0; chrome 2.0-5.0; tin 2.0-4.0; molybdenum 0.5-2.5; zirconium 0.5-2.5; niobium 0.01-0.40; yttrium 0.005-0.150; titanium and impurities - the rest.EFFECT: alloy is characterized by high values of ductility, thermal stability, and creep strength in the thermally hardened condition, while keeping the fracture viscosity values.5 cl, 2 tbl, 4 ex
Titanium-based alloy and product made from it // 2614355
FIELD: metallurgy.SUBSTANCE: titanium-based alloy contains, weight %: aluminium 6.0-8.0, molybdenum - 0.4-1.3, tin - 1.5-3.5, zirconium 1.0-5.0 , iron - 0.05-0.4, niobium - 0.4-1.4, silicon - 0.1-0.4, tantalum - 0.2-1.0, tungsten - 0.3-1.3, beryllium - 0.01-0.15, titanium - the rest.EFFECT: alloy is characterized by high values of short-term strength.2 cl, 2 tbl, 4 ex
Gamma titanium aluminide-based alloy // 2614354
FIELD: metallurgy.SUBSTANCE: gamma titanium aluminide based alloy contains wt %: aluminium 29.0-33.0 , niobium 5.0-9.0, tungsten 1.0-2.0, molybdenum 2.0-4.0, vanadium 1.0-3.0, borium 0.003- 0.1, titanium - the rest. The molybdenum and tungsten weight ratio in the alloy is 2:1. The alloy may additionally contain the iron in the amount from 0.003 to 0.3 wt % and/ or oxygen in the amount from 0.003 to 0.15 wt %.EFFECT: increase of the absolute and specific values of ultimate strength and yield strength at temperatures of 20 and 750 degrees, the working temperature of the alloy increase up to 800 degrees by providing thermal stability of structure and high stress rupture strength.3 cl, 2 tbl, 7 ex
Weldable alloy based on aluminium for meteoroid protection // 2614321
FIELD: metallurgy.SUBSTANCE: alloy contains wt %: zinc 2-8.5, magnesium 1.5-3.5, manganese 0.1-0.5, chromium 0.05-0.3, zirconium 0.05-0.3, hafnium 0.05-1.5, beryllium 0.0001-0.01, at least one element from the group: copper, titanium, nickel, cobalt up to 0.30 each, aluminium and inevitable impurities in an amount not exceeding 0.7 are the rest.EFFECT: due to uniform grain structure provides high resistance to impact with increase in strength, satisfactory ductility and weldability.3 cl, 5 ex, 2 tbl, 6 dwg
ethod of blades forgings manufacturing from titanium alloys // 2614294
FIELD: metallurgy.SUBSTANCE: forgings manufacturing method from titanium alloys includes extrusion of billet under isothermal conditions at the same temperature of heating the billet and die and subsequent isothermal forging of the extruded billet. The extrusion and isothermal forging is performed at the heating temperature of the die and billet 800-830 °C±40 °C at average strain rate not more than 0.3 mm/s.EFFECT: reduce of alloy deformation resistance and increase of dimensional stability of dies, manufacturing of blade forgings with a fine-grained structure.1 dwg,1 ex

ethod of low-autogenous raw material processing in flash smelting furnaces // 2614293
FIELD: metallurgy.SUBSTANCE: according to method, low-autogenous raw material processing in flash smelting furnace comprises supplying a metal-containing charge and flux as charge-gas flame to reaction zone of the said furnace by stream of oxygen or air enriched with oxygen, charge melting occurs to form a molten matte and slag, their separation by settling, separate liquid melting products and gases outputing. Charge composition comprises carbon containing reducer with fineness of 3-15 mm in an amount of 0.4 to 5 tons per hour in at volume ratio of 1:30 to 1:2 relative to flux.EFFECT: increased productivity of flash smelting process, reduced probability of scull formation in uptake and slag bath of furnace, and also reduced losses of non-ferrous metals with waste slag.2 cl, 3 tbl
Niobium-base alloy for forming 3d-products of complex shape and coatings // 2614230
FIELD: metallurgy.SUBSTANCE: composite niobium-based alloy, using for forming of 3d-products of complex shapes and the thermal barrier coatings contains wt %: zirconium: 1.36-2.04, vanadium: 2.64-3.96, indium: 1.0-1.6, cerium: 0.3-0.6, yttrium: 0.3-0.6, lanthanum: 0.3-0.6, tungsten carbide: 3.0-5.0, niobium - others. The alloy is obtained by introducing vanadium and zirconium in the form of intermetallic V2Zr in the amount of 4-6 wt %: indium - in the form of intermetallide InNb3 in the amount of 5.0-8.0 wt %, and tungsten carbide has fraction of 30-100 nm.EFFECT: the alloy is characterized by high microhardness, which provides high durability in a wide temperature range, in particular from positive to negative temperatures.2 cl, 1 tbl, 2 ex
Titanium-based alloy // 2614229
FIELD: metallurgy.SUBSTANCE: titanium-based alloy contains, wt %: aluminium 1.8-2.5, carbon 0.05-0.10, zirconium 2.0-3.0, iron 0.05-0.25, silicon 0.02-0.05, nitrogen 0.01-0.04, oxygen 0.03-0.10, hydrogen 0.002-0.004, palladium 0.05-0.15, titanium - the rest.EFFECT: alloy is characterized by high resistance to general, gap and pit corrosion in saline media.2 tbl, 1 ex
Titanium-based cast alloy // 2614228
FIELD: metallurgy.SUBSTANCE: casting titanium-based alloy contains, wt %: aluminium 3.5-5.0, carbon 0.02-0.14, oxygen 0.05-0.14, hydrogen 0.002-0.008, iron 0.02-0.20, silicon 0.02-0.10, vanadium 1.5-2.5, boriumn 0.001-0.003, titanium and impurities - the rest, if the following ratio is done Fe+Si≤0.25 wt %.EFFECT: alloy is characterized by high fluidity and by the complex of mechanical properties, providing the quality and reliability of both cast and welded joints.2 tbl

Carbothermic aluminium production apparatus and method // 2614223
FIELD: metallurgy.SUBSTANCE: invention relates to a system for carbothermic production of aluminium. System comprises carbothermic reactor and power supply. Reactor comprises a plurality of side-entering electrodes and a top-entering electrode. Power supply is configured to feed multiphase current to side-entering electrodes and/or top-entering electrode. Electrodes are connected with molten bath of reactor, and multiphase current fed thereto is passed through bath, thereby heating reactor. Value of current supplied to different sets of electrodes can be adjusted so as to facilitate selected heating of molten bath. Exhaust gas from carbothermic reactor is fed into a channel for charge supply, thereby pre-heating charge from aluminium and carbon reducing agent.EFFECT: higher efficiency of aluminium production due to use of alternating current.19 cl, 8 dwg

ethod of producing alumina from chromiferous bauxites // 2613983
FIELD: chemistry.SUBSTANCE: method of producing alumina from chromiferous bauxites comprises wet batch sintering, leaching of sintered material with flush water to produce aluminate solutions, whereof aluminum hydroxide is extracted. Bauxite is subjected to wet grinding on the concentrated reusable soda solution at a volume ratio of W:T=3:1 separate from the limestone. A pulp with a particle size of less than 0.05 mm is obtained. The pulp is subjected to magnetic separation to obtain magnetic and non-magnetic products. The magnetic product with chromium oxide (III) content from 25 to 30% is taken for processing to sodium chromate. The non-magnetic product with limestone fines and fresh soda is taken for the batch adjustment. Thereafter, the batch is sintered. The resulting sintered material is leached with flush water to produce aluminate solutions, whereof aluminium hydroxide is extracted. Aluminium hydroxide is filtered, washed and taken for calcination.EFFECT: invention allows to increase the complexity of processing low-quality bauxite to produce alumina and sodium chromate, reduce the environmental pressure due to the extraction of the chromium compounds.6 dwg, 3 ex
Composite material based on nitinol // 2613835
FIELD: metallurgy.SUBSTANCE: invention relates to composite materials based on nitinol, and is intended for production of micromachine and machinery parts, medical instruments. Composite material based on nitinol comprises wt %: Cu - 5-10, Zr - 5-10, Ti - 36-44, Ni - 36-44, and at least one alloying element extracted from cobalt - not less than 5, yttrium - not less than 2, niobium - not less than 5, and boron - not less than 1, the rest. Material has a biphasic structure consisting of nitinol crystalline matrix phase and amorphous phase disposed along grain boundaries of the matrix phase.EFFECT: material of diameter up to 5 mm with high strength and ductility with superelastic effect is obtained.12 dwg, 4 ex
Deposphorization method of iron ores and concentrates // 2613833
FIELD: metallurgy.SUBSTANCE: method includes the melting of iron ore concentrate in the furnace and dephosphorization of iron-containing oxide melt. The melt temperature is adjusted to a temperature of 1000-1800°C and dephosphorization is performed by blowing of the melt with gaseous carbon monoxide.EFFECT: invention allows to obtain a cast iron with low phosphorus content.3 cl, 1 ex, 1 tbl
ethod for consumable electrode producing from alloys based on titanium and aluminium intermetallic compounds // 2613832
FIELD: metallurgy.SUBSTANCE: invention relates to manufacture of consumable electrode for melting ingots of titanium-aluminium alloys containing 15-63 wt % of aluminium. Method comprises preparing a charge by mixing titanium sponge and semi-finished aluminium product, charge portion flow into conical matrix and subsequent through-feed pressing. Titanium sponge is used in the form of spherical bodies with a diameter of 10-25 mm, and aluminium semi-finished product - in the form of bars with the diameter : length ratio = 1:1. Ratio of linear aluminium semi-finished product dimensions to linear titanium sponge dimensions is 2.5-3.5.EFFECT: increased mechanical properties of electrodes.2 cl, 6 tbl
Fibrous composite material // 2613830
FIELD: metallurgy.SUBSTANCE: invention relates to fibrous composite materials reinforced with continuous and discrete fibers of aluminium oxide, intended for use as a structural material to produce articles such as gas turbine engine fan case, and can be used inaircraft engineering. The fibrous aluminium-based composite material consists of metal matrix from aluminium-based alloy containing magnesium, and continuous fibers of aluminium oxide α-Al2O3 with coating comprising discrete fibers of mullite 3Al2O3⋅2SiO2. The coating additionally comprises discrete fibers α-Al2O3 with size of 150-200 microns with the following component ratio in the composite material, vol. %: discrete fibers of mullite 3Al2O3⋅2SiO2 - 2-7, discrete fibers α-Al2O3 - 10-15, continuous fibers α-Al2O3 - 30-40, the matrix of aluminium-based alloy - the rest.EFFECT: improved strength properties of the composite material, particularly the flexural strength and the compression strength due to the isotropy of the material.4 cl, 4 ex, 1 tbl

ethod for producing of deformed semifinished products from intermetallides titanium alloys // 2613829
FIELD: metallurgy.SUBSTANCE: method for producing deformed semifinished products from gamma alloy Ti-43Al-3Nb-2W-0.5Si includes heating and a two-stage compression of cast billet in the metal clad. The cast billet is coated by thermal layer from fiberglass and/or kaolin fiber with softening temperature ≥1150°C and placed in a shell from the titanium alloy with a thickness δ, defined by the expression δ= (0.02-0.05)×∅, where ∅ - billet diameter in mm. Then the billet is heated and subjected to premoulding at temperatures 1250-1380°C with a deformation degree of 25-40%, the deformation rate of 50-60 mm/s, and then the final compression with deformation degree 96-98%, followed by cooling of compressed semifinished products upto the room temperature.EFFECT: obtaining the billet uniform structure, which provides high values of stress limit and elongation at the room temperature, heat resistance at temperatures up to 800°C.4 cl, 1 dwg, 2 tbl, 6 ex
ethod of producing semi-finished products from two-phase titanium alloys // 2613828
FIELD: metallurgy.SUBSTANCE: method of producing semi-finished products from two-phase titanium alloys comprising heating in β-area, deformation, cooling and cyclic processing. After heating in β-area to a temperature higher than a temperature of polymorphic transformation by 200-300°C, holding is carried out for 3-6 hours, deformation is carried out with degree of 60-95% during cooling to a temperature lower than a temperature of polymorphic transformation by 150-200°C. Phased cyclic processing is carried out, at first heating of the semi-finished product is carried out to a temperature lower than the temperature of polymorphic transformation by 100-130°C, holding at this temperature is carried out for 0.2-1.5 hours, deformation is carried out with degree of 20-50% during cooling to a temperature lower than the temperature of polymorphic transformation by 250-350°C. In the next stage the heating in β-area is carried out to a temperature higher than the temperature of polymorphic transformation by 20-30°C, holding at this temperature is carried out for 2-3 hours, deformation is carried out with a degree of 50-70% during cooling to a temperature lower than a temperature of polymorphic transformation by 200-250°C. In the last stage the heating in α+β-area is performed to a temperature lower than the temperature of polymorphic transformation by 150-200°C, holding at this temperature is carried out for 0.2-1 hours, deformation is carried out with a degree of 10-20% during cooling to a temperature lower than the temperature of polymorphic transformation by 150-180°C. Then, air cooling is carried out at the rate of 50-70°C/min to room temperature.EFFECT: increased strength and plasticity of semi-finished products and ensured stability of strength and plastic properties.1 tbl, 3 ex

High-strength thin-walled steel pipes welded by electric resistance welding with high impact strength and method of their production // 2613824
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, specifically to thick-walled steel pipes, which can be used for drilling or oil and natural gas transportation. High-strength thick-walled steel pipe, welded by electric resistance welding, contains, wt%: C 0.025–0.084, Si 0.10–0.30, Mn 0.70–1.80, P 0.001–0.018, S 0.0001–0.0029, Al 0.01–0.10, Nb 0.001–0.065, V 0.001–0.065, Ti 0.001–0.033, Ca 0.0001–0.0035, N 0.0050 or less, O 0.0030 or less, if necessary, at least, one element, selected from: B 0.0030 or less, Cu 0.001–0.350, Ni 0.001–0.350, Mo 0.001–0.350 and Cr 0.001–0.700, Fe and incidental impurities are rest. Pcm parameter, characterizing microstructure after pipe welded seam fast cooling and defined by expression Pcm=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5·B, is equal to 0.20 or less. Microstructure includes 90% or more of quasi polygonal ferrite by area, having grain size of 10 mqm or less in steel pipe main part and in part, welded by electric resistance welding.EFFECT: pipe is characterized by high values of low-temperature impact strength and resistance to hydrogen cracking, as well as high reliability of pipe welded part.10 cl, 3 dwg, 5 tbl, 2 ex
ethod for precious metals concentrate production from copper-nickel converter matte // 2613823
FIELD: chemistry.SUBSTANCE: method comprises oxidative hydrochloride leaching by gradual supply of metallized fraction to a chloride solution at ORP of 400-450 mV with transfer of the main part of non-ferrous metals to the solution, and precious metals and sulfur concentrating in the residue. The sulfur is leached from the residue with a solution of sodium sulfite or sulfide with a concentration of 150-250 g/l and 100-150 g/l, respectively, with S:L = 1:5-10 to obtain a precious metal concentrate and a sulfur-containing solution, which is delivered to converter matte reprocessing. The precious metal concentrate is subjected to liquid-phase sulphatization at a temperature of 180-210°C to obtain enriched concentrate. Additional sulphatization of the precious metal concentrate at a temperature of 280-300°C to obtain a palladium-platinum concentrate and platinum satellite metal concentrate is possible. The total content of platinum and palladium in the concentrate increases 1.6-11 times.EFFECT: reduced losses of precious metal and increased content thereof in the concentrate.4 cl, 7 ex

ethod of making plate of textured electrical steel // 2613818
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy. To reduce losses in iron and provide small fluctuations of value of losses in iron method involves hot rolling of steel slab, containing, wt%: C 0.002–0.10, Si 2.0–8.0 and Mn 0.005–1.0, for producing hot-rolled sheet, if necessary annealing in hot zone conditions of hot-rolled steel sheet, single, or double, or repeated cold rolling with intermediate annealing between them for producing cold-rolled sheet of final thickness, primary recrystallization annealing in combination with carbon-removing annealing of cold-rolled sheet, application of annealing separator on surface of steel sheet and final annealing, fast heating is performed at rate of no less than 50 °C/s in range of 100–700 °C in process of heating of primary recrystallization annealing, steel plate is held at any temperature within 250–600 °C for 0.5–10 s 2–6 times.EFFECT: reduced losses in iron.9 cl, 4 tbl, 4 dwg
Corrosion-resistant nickel-based alloy // 2613805
FIELD: metallurgy.SUBSTANCE: invention can be used for manufacture of corrosion-resistant pipes, housings, evaporators and other welded units and parts to be operated in aggressive oxidizing media, in particular, chloride, such as KCl-AlCl3, at temperatures up to 650°C. Corrosion-resistant nickel-based alloy comprises, wt %: chromium 28-30, molybdenum 8-10, nitrogen 0.005-0.1, aluminium 0.1-0.3, carbon 0.004-0.01, silicon 0.001-0.05, iron not more than 0.5, manganese not more than 0.25, lanthanum 0.002-0.05, nickel and impurities 61-63.EFFECT: alloy with improved physical, mechanical and operational properties: structural stability in chloride media in a temperature range of 500-650 degrees, ductility, corrosion resistance, including resistance to local types of corrosion, with good formability and weldability values.2 cl, 3 tbl
Bearing with sliding layer // 2613640
FIELD: machine engineering.SUBSTANCE: bearing with the sliding layer consists of a mould body coated with an anti-friction bearing alloy based on aluminium or copper and electroplated sliding layer, which comprises a matrix of a solid solution of tin and antimony in an amount of 0.5…4.5 wt %, Containing inclusions of copper-tin compounds particles Cu6Sn5 with a total content of copper alloy 2…25 wt %. The lead impurity content of not more than 0.35% and the total content of other impurity elements does not exceed 1%.EFFECT: creation of the layer for a sliding bearing with improved operating characteristics.
Hypereutectic silumin piston blank production method // 2613498
FIELD: metallurgy.SUBSTANCE: method includes: furnace charge melting, melt hydrogen refining, out-of-furnace melt modification by ligature containing phosphorus compounds, piston blank preparation and its homogenization. In this case, out-of-furnace melt modification is carried out with providing for crushing of primary silicon crystals by applying an alloyed rod from quickly cristallized one at a cooling rate of at least 1×102 K/s, aluminum-based alloy containing dispersed phases of aluminum compound with the phosphorus (AIP) having a particle size 50 nm to 10 microns, and the melt is refined until the hydrogen content level is not more than 0.35 cm3/100 g. The blank is produced by semicontinuous casting.EFFECT: invention allows to produce hypereutectic silumin piston blanks by semicontinuous casting method with physical and mechanical characteristics similar to the moulded blank from pellets.2 tbl, 1 ex

Inductor core, arrangement for press and manufacturing method // 2613331
FIELD: electrical engineering.SUBSTANCE: invention relates to electrical engineering. Inductor core is made of a compressed soft magnetic powder material and comprises a base core portion having a first surface and an opposite second surface; an inner core portion extending from first surface in a direction transverse to first surface; an outer core portion extending, in direction transverse to first surface, from first surface to an end surface of outer core portion. Outer core portion at least partly surrounding inner core portion, thereby forming a space around inner core portion for accommodating a winding. First surface comprises a recess for accommodating a connection portion of winding, said recess extending at least a part of a distance between inner core portion and outer core portion. Outer core portion has a slit extending from said end surface towards recess. Second surface comprises a first protrusion oppositely arranged to recess.EFFECT: technical result consists in improvement of efficiency.14 cl, 10 dwg
High-strength aluminium-based wrought alloy of al-zn-mg-cu-system and article made thereof // 2613270
FIELD: metallurgy.SUBSTANCE: high-strength Al-based wrought alloys of the Al-Zn-Mg-Cu system and article thereof contain, wt %: 7.8-8.2 Zinc, 2.0-2.4 magnesium, 1.8-2.1 copper, 0.1-0.17 scandium, 0.1-0.14 zirconium, 0.0005-0.001 cerium, 0.01-0.03 titanium, 0.0005-0.001 boron, aluminum and inevitable impurities, including not more than 0.12 iron, no more than 0.11 silicon, no more than 0.02 manganese, not more than 0.02 chromium, - the rest, while hydrogen is present in the alloy in an amount of 0.05-0.3 cm3/ 100 g of metal, and the ratio of magnesium and zinc is from 0.25 to 0.3.EFFECT: increased strength characteristics, including specific strength of the material.2 cl, 1 ex, 2 tbl
ethod of producing hot-rolled sheets from constructional low-alloy steel with guaranteed maintenance of construction perfomance properties at low temperatures (versions) // 2613269
FIELD: metallurgy.SUBSTANCE: while producing thick sheets, austenitization of continuously cast ingot is carried out at 1200-1220 °C, finish rolling starts at 780-820 °C and finishes at 740-760 °C with a total reduction of at least 80% to a final sheet thickness of not more than 15 mm. Steel contains the following chemical composition, wt %: 0.17-0.20 C, 0.15-0.25 Si, 1.25-1.40 Mn, S≤0.006, P≤0.018, Cu≤0.10, Nb≤0.01, V≤0.01, 0.02-0.05 Al, Ti≤0.03, Fe inevitable impurities - the rest. While producing sheets of 15-25 mm thickness from the steel of the same composition, austenitization of continuously cast ingot is carried out at 1200-1220 °C, finish rolling starts at 830-860°C and finishes at 760-790 °C with a total reduction of at least 75%, wherein after the finish rolling the sheets are rapidly cooled to 620-670 °C. Production versions of the sheets of 40-80 mm, 80-120 mm, 120-160 mm thickness with the same steel composition are also presented. In all versions of the method, the rolling at the draft stage is carried out with one-time reductions of at least 7%.EFFECT: maintenance of perfomance properties at low temperatures.12 cl, 3 tbl
ethod of producing beryllium metal // 2613267
FIELD: chemistry.SUBSTANCE: beryllium metal is produced by magnesiothermal reduction of beryllium fluoride at 900°C in high-frequency electric furnaces with a graphite crucible. A magnesium powder and a beryllium fluoride are placed in layers in a graphite crucible for reduction. The uppermost layer of beryllium fluoride and the lowermost layer of magnesium comprise at least 40% of the total amount of reactant. The amount of magnesium used for the reduction comprises 75% of thestoichiometrically-required. The reduction of beryllium and melting are carried out in an argon atmosphere. The beryllium fluoride and the magnesium powder are placed in the crucible in layers again after melting and cooling products to 600-650°C, and the reduction process is repeated.EFFECT: reduction of beryllium losses and beryllium fluoride and magnesium consumption.2 ex
ethod of producing hot-rolled sheets from low-alloyed tube steel of k60 strength grade for longitudinal electric-welded pipes // 2613265
FIELD: metallurgy.SUBSTANCE: continuously cast steel ingots are produced containing, in wt %: 0.07-0.10 C, 0.20-0.35 Si, 1.60-1.75 Mn, not more than 0.10 of Cr, not more than 0.30 of Ni, not more than 0.20 of Cu, 0.010-0.025 Ti, 0.065-0.090 V, 0.040-0,060 Nb, not more than 0.5 of Mo, not more than 0.008 of N, 0.020-0.050 Al, not more than 0.004 of S, not more than 0.015 of P, Fe and inevitable impurities - the rest and having a total content of V+Ti+Nb not more than 0.15%, then the heating of the ingot to 1200±10°C, rough rolling with a regulated roll reduction in thickness, multiple of 4-5 thickness of the finished sheet, cooling down, finish rolling at the start temperature of 740-780°C and - and the finish temperature of 730-770°C, accelerated cooling to 580-680°C and air cooling are carried out to obtain a structure mainly consisting of bainite and ferrite.EFFECT: ensuring of the given mechanical properties of the finished steel.4 cl, 3 tbl
Production method of hot-rolled rolled stock from low-alloy steel // 2613262
FIELD: metallurgy.SUBSTANCE: method includes slabs heating in the temperature range of 1,230-1,250°C, subsequent multipass reversible rough and final rolling with regulated temperatures of the rolling beginning and end, and the rough rolling is completed at the temperature of not more than 1,000°C, the final rolling is started at the temperature in the range of 960-1,000°C and completed in the temperature range of 820-880°C. Final rolling includes 7-9 runs. Slab is made of steel containing in wt %: C=0.22-0.26, Si=0.30-0.40; Mn=0.75-1.10, Al=0.01-0.035, Nb=0.03-0.05, Cr not more than 0.3, Ni not more than 0.3, Cu not more than 0.3, S not more than 0.010, P not more than 0.015, N not more than 0.008, V not more than 0.05, Ti not more than 0.05, Fe - the rest. The end temperature of the final rolling is 820-850°C for sheets with thickness of 8-20 mm and 850-880°C for sheets with thickness 20.1-50.0 mm. In the hot-rolled sheet, a ferrite-pearlite structure is provided for with a grain size not larger than 9 points.EFFECT: ensuring a high level of heat stability and impact toughness.3 cl, 3 tbl, 1 ex

anufacturing method for welded titanium tubes // 2613256
FIELD: metallurgy.SUBSTANCE: tube blank (3) is received by bending flat sheet blank (2) and welding longitudinal edges (1). Rotary rolling of a weld (4) of a tube blank (3) mounted on a rotating mandrel (5) by means of pressing elements (6) of the hard tool (7) is performed. Annealing of welded titanium tube (8) is carried out to remove the residual stresses. Therein rolling of the weld (4) is produced with relative deformation of 8%≤ε≤20% along the wall thickness of tube blank (3), wherein ε=(t0-t)/t0×100%, where t0 is the wall thickness of the tube blank (3), t is the wall thickness of the welded titanium tube (8) after rolling the weld (4) and subsequent annealing - at temperature (Trs-170)°C≤Tann≤(Trs-50)°C which is determined from the range, where Trs is the temperature of recrystallization start of the titanium alloy,°C.EFFECT: increased strength and cycle life of welded titanium tubes through the optimal selection of thermomechanical processing parameters for tube round billets.4 dwg
ethod for scandium extraction from productive solutions // 2613246
FIELD: chemistry.SUBSTANCE: method includes sorption of rare earth metals solutions on a strongly acidic cation of porous structure with subsequent desorption of rare earth metals and eluate withdrawal. Next, scandium sorption is carried on a porous styrene-divinylbenzene carrier with an impregnated organophosphorus extractant, represented by di-(2,4,4-trimethylpentyl)phosphinic acid with addition of di-2-ethylhexyl phosphonic acid to obtain a return solution directed to leaching, and scandium desorption with eluate withdrawal.EFFECT: increased processing efficiency of these solutions due to high sorbent selectivity for scandium extraction in the pH range of the return solution, reduced reagent consumption and improved quality of end scandium products.4 cl, 3 tbl, 3 ex

ethod of making workpieces of tungsten-titanium hard alloy // 2613240
FIELD: technological processes.SUBSTANCE: invention relates to production of tungsten-titanium hard alloy workpieces. Method involves hot pressing powder in vacuum while passing high current through mold and pressed powder at a temperature of 1,320 °C for 3 minutes. Powder used is produced by electroerosion dispersion of wastes of hard alloy T15K6.EFFECT: higher operational resistance.1 cl, 10 tbl, 2 ex
ethod of producing scandium concentrate from scandium-bearing solution // 2613238
FIELD: metallurgy.SUBSTANCE: invention relates to chemistry and metallurgy, more specifically to technology of extracting scandium from product solutions, formed when processing uranium ore, during their production by underground leaching. Method of extracting scandium from scandium-bearing product solution uses an ionite with phosphorus and sulpho-containing functional groups, having high capacity for scandium. Operation of washing reduces costs for further processing desorption solutions and obtaining richer concentrates of scandium. Processing of acidified desorption solution before deposition of scandium concentrate by passing through high-basic anionite allows separation of scandium from uranium ions, which results in more efficient subsequent processing of desorption solutions to obtain concentrates richer in scandium and simplification of further production of scandium oxide.EFFECT: technical result of claimed invention is obtaining more pure scandium concentrate.1 cl, 3 tbl, 3 ex
Cast brass // 2613234
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, in particular to a composition of multicomponent deformable copper alloys containing Zn, Mn, Al, Si, Ni, Cr and intended for production of cast workpieces subjected to plastic working for production of parts, operating in conditions of higher tribotechnical wear. Cast brass contains zinc, manganese, aluminium, silicon, chromium, nickel and copper and has a structure consisting of solid solution matrix hardened with intermetallic compounds, wherein particles of intermetallic compounds have an equiaxial shape and consist of a core of chromium silicide and a shell of manganese silicide and are distributed in alloy volume with density of 50–138 thousand particles/mm3.EFFECT: higher hardness of cast brass.1 cl, 3 dwg, 1 tbl
Flux cored wire for coatings resistant to abrasive wear and high-temperature corrosion // 2613118
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, in particular, to flux cored wires for coating, and can be used for parts, operating in conditions of abrasive particles and high temperatures. Flux cored wire consists of a steel cladding and core made from a mixture containing, wt%: chrome 5.0–15.0, boron 1.0–5.0, aluminium 2.0–12.0, carbon 0.2–1.0, yttrium 0.5–1.0, iron – balance. Obtained coatings have high micro-hardness and heat resistance.EFFECT: higher wear resistance and corrosion resistance of parts, operating in conditions of abrasive particles and high temperatures.1 cl, 1 tbl, 1 ex

Hot pelletizing drum-type unit // 2613116
FIELD: metallurgy.SUBSTANCE: invention refers to production of fired pellets and can be used in the mining industry, ferrous and nonferrous metallurgy before pyrometallurgical processing of raw materials. The hot pelletizing drum-type unit comprises a drum housing with green pellet production zones, those for drying, heating, baking and cooling, a heater comprising a burner block located in the firing zone, and a gas flue mounted from the side of discharge. The heater is further provided with burners, one of which is mounted at the end of the heating zone and the other-at the beginning of the pellets cooling zone, in this case the burners are arranged in a diametral plane of the drum at an angle (35-40)° to the vertical axis. The heater includes 4-5 burners.EFFECT: invention provides for the increased quality of the fired pellets.2 cl, 2 dwg
anufacturing method for parts from titanium alloys // 2613003
FIELD: metallurgy.SUBSTANCE: load carrying components are made of VT8 titanium alloy. Then heat treatment is sequentially performed in three stages. The first is carried out at temperature from 600 to 650 °C, at which the titanium silicides are released from supersaturated solid solutions -α and -phases β. The second is carried out at temperature from 850 °C and above, which is characterized by conversion of the phase composition from α- to β-. The third is conducted at temperature from 950 to1100 °C. At 1100 °C the phase composition of the alloy is represented only by β-phase.EFFECT: improved strength characteristics of VT8 titanium alloy parts.

ixture for making tungsten-titanium hard alloys // 2612886
FIELD: technological processes.SUBSTANCE: invention relates to production of tungsten-titanium hard alloys. Charge contains tungsten carbide powder and titanium carbide in form of a product electroerosion dispersion of wastes of hard alloy T15K6, which is obtained in kerosene and distilled water and has an average particle size 19.692 mcm and 5.118 mcm respectively.EFFECT: higher quality of tungsten-titanium hard alloys.1 cl, 3 dwg, 2 ex
ethod of obtaining magnesium alloy granules // 2612869
FIELD: metallurgy.SUBSTANCE: method comprises atomizing of magnesium alloy supernatant liquid in a protective gas atmosphere with a rotating spray cup. Atomization is carried out in a protective gas atmosphere positioned between the surface of the spray cup and the cooling medium. Gaseous nitrogen with a dew point less than - 50°C is used as the protective atmosphere, and 4-6 percent KOH alkaline aqueous solution is used as the cooling medium.EFFECT: higher mechanical properties of magnesium alloys.1 tbl, 1 ex

ethod of melting highly reactive metals and alloys based thereon and device therefor // 2612867
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for melting and casting of highly reactive metals and alloys. Method comprises controlling supply of melt from a first chamber to a second while ensuring tightness between them through a cooled insert made of remelted metal installed in place of connection of chambers, which is molten in centre using an independent melting source, wherein size of melted hole in insert is adjusted to ensure capacity corresponding to volume of purified melt. Device is configured to control melt supply from first chamber to second chamber, wherein first and second chambers are communicated by cooled insert made from remelted metal, wherein first chamber is equipped with a pipe for removal of gas impurities from melt, and second chamber is filled with a pumping pipe, enabling creation therein of a greater vacuum than in first chamber.EFFECT: invention reduces power consumption, reduces duration of production cycle, increases metal weight during melting and reduces dimensions of equipment.2 cl, 4 dwg

ethod of increasing microhardness of copper products // 2612862
FIELD: metallurgy.SUBSTANCE: method of processing products of polycrystalline copper involves exposing a product to the constant magnetic field with induction from 0.1 to 0.4 Tesla and keeping it in the magnetic field for 1 hour.EFFECT: increased microhardness of products made of polycrystalline copper.1 dwg

ethod for processing of oxidation products of refractory sulphide auriferous flotation concentrates (versions) // 2612860
FIELD: metallurgy.SUBSTANCE: group of inventions refers to non-ferrous metallurgy, in particular to the methods of processing oxidation products of refractory sulphide auriferous flotation concentrates. The method of processing oxidation products of refractory sulphide auriferous flotation concentrates includes dewatering of initial product taken as bio-pulp or autoclave pulp to give cake and centrate, and separate processing with the extraction of gold. Thus dehydration of bio-pulp or autoclave pulp is carried out by centrifugal separation to obtain cake and centrate. The resulting centrate is sent to further processing with the extraction of gold. The resulting cake is sent to further processing with the extraction of gold separated from the centrate.EFFECT: invention provides an increase in gold extraction within the processing of bacterial or autoclave oxidation products of refractory sulphide auriferous flotation concentrates.27 cl, 4 tbl, 3 ex, 27 dwg
ethod of producing low-modulus alloys based on titan-niobium system by selective laser alloyage // 2612480
FIELD: metallurgy.SUBSTANCE: first, titanium and niobium powders are mechanically activated at a weight ratio of 6:4. Then the mechanically activated mixture of titanium-niobium powder is placed in a vacuum chamber in a laser processing zone with 0.05-0.1 mm layer. Forevacuum of at least 10-2 Pa is created in the vacuum chamber, and argon is injected. Heating is performed by intense laser radiation to a temperature of 2800-3000°C, followed by holding at said temperature for 1-3 msec.EFFECT: obtaining low-modulus titanium-niobium alloy of given composition with certain properties, with a uniform distribution of structural components throughout the alloy volume, which is environmentally friendly due to the absence of foreign materials in synthesis products, reducing the processing time and reducing the cost of the finished product due to the absence of pre-melting of TiNb alloy and subsequent production of powder from this alloy for selective laser alloyage.3 cl, 3 ex
Wrought aluminium-based alloy // 2612475
FIELD: metallurgy.SUBSTANCE: wrought aluminium-based alloy comprises, wt %: magnesium 0.45-0.6 , scandium 0.1-0.15, zirconium 0.1-0.15, calcium 0.02-0.1, iron 0.4-0.7, silicon 0.45-0.65, aluminium and inevitable impurities - the rest, including not more than 0.05 of cuprum, not more than 0.05 of zinc, not more than 0.02 of manganese, not more than 0.02 of chromium.EFFECT: increased strength properties of the material.1 ex, 2 tbl
Heat-resistant iron-based alloy // 2612465
FIELD: metallurgy.SUBSTANCE: heat-resistant iron-based alloy contains, wt %: C 0.1-0.15; Si 1.5-2.0; Al 18.0-20.0; Cr 15.0-20.0; Mo 0.2-0.3; B 0.5-1.5; Fe - the rest.EFFECT: high heat resistance of alloy.1 tbl
ethod of preparation of charge for smelting titanium slag in ore furnace // 2612332
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy, particularly to making metallic titanium from titanium slag, specifically to preparing charge for smelting titanium slag in ore furnace. The method includes crushing of a carbonaceous reducing agent, metering and mixing it with an ilmenite concentrate to make the charge, transporting and loading the charge to the ore furnace bins. After crushing the carbonaceous reducing agent is dried to mass residual moisture content of up to 5 wt %, coal wastes are recovered from filters during gases cleaning from the process of the carbonaceous reducing agent preparation, the coal waste is loaded into a mixer where a liquid binder is delivered under the weight ratio S:L equal to (3-7):1 and stirred to make a pasty mass which is formed into briquettes and dried, the briquetted coal waste is mixed with the carbonaceous reducing agent under the weight ratio of briquetted coal waste:carbonaceous reducinf agent of 1:(15-25) and the made mixture is mixed with the ilmenite concentrate for making the charge for smelting of titanium slag.EFFECT: invention reduces the costs of raw materials and materials, the cost of titanium slag and environgmental emissions of waste products.6 cl, 3 ex
Treatment method of ree phosphate concentrate // 2612244
FIELD: chemistry.SUBSTANCE: invention relates to the treatment of phosphate concentrate of rare-earth elements (REE) obtained during the apatite complex processing, and can be used in industry to produce non-radioactive carbonate or hydroxide REE concentrate. Phosphate REE concentrate treatment is carried out comprising the impuritites of calcium, thorium, aluminum and iron, when heating in the presence of sulfoxide cation 1.2 wt % with nitric acid, wherein fluorine-ion is injected in an amount determined according to the correlation. Sulfoxide cation absorbs REE and calcium, while phosphorus, fluorine and thorium transfer into the formed pulp during the concentrate processing. Then REE and calcium are desorbed from cation with ammonium nitrate solution to produce a desorbate. Thereafter, the desorbate is neutralized with ammonium compound to pH of 7.35-7.5 to produce a purified REE concentrate.EFFECT: exclusion of radioactive sulfoxide cation formation during its multiple using and consumption reduction of acid reagent and cation.5 cl, 5 ex

ethod for producing aluminium nanopowders // 2612117
FIELD: nanotechnology.SUBSTANCE: invention relates to obtaining aluminum nanopowder from aluminium electrical wire waste and contains at least 99.5% of aluminium. Lead waste spark erosion dispersion in distilled water at a pulse repetition frequency of 95 - 105 Hz, the voltage across the electrodes 90 - 10 and 65 mcF capacitors, followed by centrifugation to separate the solution of large-sized particles from the nanopowder.EFFECT: method of producing aluminium nanopowder, which provides reduced energy costs and improves the ecological purity of the process.6 dwg, 2 ex
Steel sheet and method of steel sheet // 2612109
FIELD: metallurgy.SUBSTANCE: to provide improved deformation capacity of a steel, method comprises melting steel containing, wt%: carbon – 0.04–0.08, silicon – 0.10–0.30, manganese –1.60–1.85, chromium – not 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 over 0.01, sulphur – not more than 0.003, phosphorus – not more than 0.013, balance is iron and unavoidable impurities to produce a slab, slab is heated to 1,100–1,200 °C, rough rolling at 950÷1,050 °C, cooling in air, finish rolling at 700÷820 °C to required thickness of sheet with total reduction of 75–85 %, cooling at a rate of 20÷35 °C/s to 300÷500 °C and cooling on air to temperature not higher than 150 °C.EFFECT: disclosed is a method of producing a steel sheet with thickness of 15–40 mm with yield point higher than 480 MPa.2 cl, 3 tbl
ethod of extracting scandium from scandium-bearing product solution // 2612107
FIELD: technological processes.SUBSTANCE: invention relates to a technology of extracting scandium from man-made and productive scandium containing solutions produced after extraction of uranium during its production by the method of underground leaching. Method involves sorption of scandium from a scandium-bearing solution on a solid extractant with high selectivity by scandium (SOLEX). Scandium-bearing product solution acidity is brought to pH=1÷2. Before re-extraction the SOLEX is washed with a solution of sulphuric acid with the concentration of 50–200 g/dm3. Re-extraction is performed with a re-extraction suspension formed by mixing a solution of hydrofluoric acid and a coprecipitator in the form of a freshly prepared solution of calcium fluoride. Herewith the saturated by scandium after re-extraction suspension is filtered to produce a concentrate of scandium, and the filtrate is additionally saturated by hydrofluoric acid and by the coprecipitator to produce a re-extraction suspension, which is repeatedly directed to re-extraction, and the SOLEX after re-extraction is returned for extraction of scandium.EFFECT: technical result is production of cleaner concentrate of scandium.1 cl, 2 tbl
 
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