Abstract: The present invention relates to metallurgy of high-strength cast and wrought alloys based on aluminum, and can be used in missioncritical designs operable under load, in the transport field, sports industry, casings for electronic devices, and other industrial sectors. The technical result aims to enhance mechanical characteristics of articles produced from the alloy by precipitation hardening caused by secondary phases in the age-hardening process while providing high workability during casting. The claimed high-strength alloy comprises zinc, magnesium, nickel, iron, copper, zirconium, and at least one metal selected from a group consisting of titanium, scandium and chromium, with the following amounts in, wt %: zinc 3.8-7.4; magnesium 1.2-2.6; nickel 0.5-2.5; iron 0.3-1.0; copper 0.001-0.25; zirconium 0.05-0.2; titanium 0.01-0.05; scandium 0.05-0.10; chromium 0.04-0.

Abstract: Disclosed is a method for processing bauxites to produce alumina comprising: filtering an alumina slurry obtained after a digestion of the bauxites, the slurry, after leaching, dilution or thickening, is filtered at a temperature of at least 95° C. to obtain a filtrate representing a green liquor after the filtration and a solid phase of a red mud on filtration equipment; and washing the solid phase of the red mud on the filtration equipment, the washing being carried out with hot water at a temperature of below 98° C. the filtrate being subjected to security filtration or precipitation, and the water after washing the red mud on the filtration equipment is fed for dilution of the alumina slurry after the digestion of the bauxites or dilution of the filtrate to obtain a specified concentration of the green liquor, wherein a resulting cake is a waste product.

Abstract: The present disclosure relates to metallurgy, more particularly to a composition and a process for producing part blanks and finished parts from aluminum-based alloys including but not limited to using selective laser melting processes. The proposed aluminum-based alloy comprising magnesium, zirconium and scandium for atomization an aluminum powder therefrom and subsequent producing finished parts by additive technologies has a reduced content of scandium and further comprises oxygen and calcium with a limited size of the oxide film and a moister content.

Abstract: The disclosed subject-matter relates to the field of metallurgy, in particular to aluminum-based alloys, and can be used to manufacture thin-walled complex-shaped castings by casting in a metal mold, in particular for automotive components, parts of electronic devices, etc. The aluminum-based casting alloy comprises by wt. %: calcium 1.5-5.1; iron up to 0.7; silicon up to 1.0; zinc 0.1-1.8 and, optionally, one or more of manganese 0.2-2.5; titanium 0.005-0.1; zirconium 0.05-0.14; chrome 0.05-0.15, with calcium and zinc present in the alloy structure primarily as eutectic particles. The technical result is to provide a combination of process properties in casting and corrosion resistance.

Abstract: The invention relates to production of alloys based on aluminum. A method is proposed for producing aluminum-based alloys by electrolysis, according to which low-consumable anode of aluminum pot is used as a source of alloying elements. At the same time, in order to optimize master alloy consumption, one of the following options is chosen: dissolution of alloying elements from slightly soluble anodes; adding oxides and/or fluorides and/or carbonates of alloying elements to electrolyte melt of aluminum pot; simultaneous dissolution of alloying elements from slightly soluble anodes with addition of oxides and/or fluorides and/or carbonates of alloying elements to electrolyte melt of aluminum pot.

Abstract: A method for combined rolling and extruding of cast billet is proposed. When implementing the method for combined rolling and extruding of metals or alloys, a cast billet with a predetermined temperature is fed to the working gauge, in which it is rolled and then to the die, through which the cast billet is extruded. When the cast billet is fed into the working gauge, a cladding layer of metal or alloy is created on the surfaces of the rolls by extruding the cast billet through the gaps formed between the surfaces of the rolls and the die. This invention makes it possible to improve the quality of the resulting products, as well as to increase the efficiency of the process as a whole.

Abstract: This disclosure relates to the field of metallurgy, namely, to the composition of an aluminum-based heat-resistant alloy and a powder from it to be used for the production of parts using additive technologies. A new aluminum-based material has been created, which is intended for producing a powder and its utilisation in the additive production of various products, which has high processability at laser melting and high strength characteristics in the heat-treated state: the yield strength exceeding 400 MPa, the ultimate strength exceeding 470 MPa, and elongation at break of at least 4%. The powdered aluminum material contains copper, magnesium, manganese, cerium, silicon, zirconium and/or titanium, where the material contains thermally stable Al8Cu4Ce dispersoids with a size of less than 1 ?m, which are formed at crystallisation rates of at least 103 K/s, which contribute to the material strengthening under operating conditions at room and elevated temperatures.

Abstract: The invention relates to the field of metallurgy, namely to new heat-resistant aluminum alloys used in additive technologies. The alloy includes nickel, manganese, iron, zirconium, cerium, at least one element selected from the group: copper, magnesium, zinc, and at least one element selected from the group: silicon, calcium, where Ni>Mn+Fe, one or more eutectic phases of the type of Al3Ni, Al16Mn3Ni, Al9FeNi, which are thermally stable, and dispersoids of the Al3Zr type, which ensure an ultimate strength of a resulting product of at least 370 MPa. The technical effect is the development of an aluminum material used in the form of a powder, which has good processability when printing and increased strength characteristics at room temperature after printing, without a significant decrease in strength after annealing.

Abstract: The invention relates to the field of metallurgy of aluminum-based materials and may be used for the manufacture of products operating in corrosive environments under high loads, in particular, at elevated and cryogenic temperatures. The new aluminum alloy with a structure comprising an aluminum solution, precipitations and an eutectic phase formed by elements such as magnesium, manganese, iron, chromium, zirconium, titanium and vanadium, is claimed. Besides, the alloy additionally contains silicon and scandium, wherein at least 75% of the share of each element from the group of zirconium and scandium form precipitations with the lattice of type L12 in the amount of at least 0.18% vol and the particle size of no more than 20 nm, with the specified redistribution of alloying elements.

Abstract: The present disclosure relates to metallurgy, more particularly to a composition and a process for producing part blanks and finished parts from aluminum-based alloys including but not limited to using selective laser melting processes. The proposed aluminum-based alloy comprising magnesium, zirconium and scandium for atomization an aluminum powder therefrom and subsequent producing finished parts by additive technologies has a reduced content of scandium and further comprises oxygen and calcium with a limited size of the oxide film and a moister content.

Abstract: Disclosed herein are methods for producing an aluminum-scandium alloy comprising 0.41-4 wt % of scandium which can be used in industrial production setting. The method is carried out by melting aluminum and a mixture of salts comprising sodium, potassium and aluminum fluorides followed by performing simultaneously, while continuously supplying scandium oxide, an aluminothermic reduction of scandium from its oxide and an electrolytic decomposition of the formed alumina. Periodically, at least a portion of the produced alloy is removed, aluminum is then charged, and the process of alloy production is continued while supplying scandium oxide. Also disclosed is a reactor for producing an aluminum-scandium alloy pursuant to the methods described herein.

Abstract: The invention relates to the metallurgy field, in particular to the production of aluminium-based cast materials, and can be used for producing crucial components under high-load conditions. The primary application is for components used in automotive engineering, sports equipment, etc. Proposed is an aluminium-based high-strength alloy, containing zinc, magnesium, calcium, metal, titan, and at least one element from the group consisting of silicon, cerium, nickel, zirconium and scandium, using defined concentrations of the constituents. The technical result of the invention is increased strength properties of the alloy and the products made therefrom on account of the formation of secondary precipitates of a strengthening phase by means of dispersion hardening.

Abstract: The invention relates to the field of metallurgy of aluminum-based materials and can be used to produce articles (including welded structures) operated in corrosive environments (humid atmosphere, fresh or sea water, and other corrosive environments) and under high-load conditions, including at elevated and cryogenic temperatures. A new, inexpensive, high-strength aluminum alloy is provided with high physical and mechanical properties, performance, and corrosion resistance, in particular, high mechanical properties after annealing (tensile strength of at least 400 MPa, yield point of at least 300 MPa, and relative elongation of at least 15%) and high performance in deformation processing; wherein high performance in deformation processing is provided due to the presence of eutectic Fe-containing alloy phases, accompanied by increased mechanical properties due to the formation of compact particles of eutectic phases and secondary separation of the Zr-containing phase with the L12 crystal lattice.

Abstract: The proposed invention relates to the field of metallurgy, namely, to aluminium-based alloys used for the production of powders applied in the manufacture of parts using additive technologies, including the method of selective laser melting. A powder aluminium material containing magnesium, chromium and zirconium is proposed, which additionally contains boron and at least one element from the group of manganese, iron and nickel, with a given ratio of components. The technical result is an increase in the strength of aluminium alloy for the manufacture of parts using powder and additive technologies while maintaining a high level of elongation, high thermal stability and the absence of defects such as hot cracks.

Abstract: The present disclosure relates to metallurgy, more particularly to a composition and a process for producing part blanks and finished parts from aluminum-based alloys including but not limited to using selective laser melting processes. The proposed aluminum-based alloy comprising magnesium, zirconium and scandium for atomization an aluminum powder therefrom and subsequent producing finished parts by additive technologies has a reduced content of scandium and further comprises oxygen and calcium with a limited size of the oxide film and a moister content.

Abstract: The invention relates to the field of metallurgy of aluminum-based materials and can be used to produce articles (including welded structures) operated in corrosive environments (humid atmosphere, fresh or sea water, and other corrosive environments) and under high-load conditions, including at elevated and cryogenic temperatures. A new, inexpensive, high-strength aluminum alloy is provided with high physical and mechanical properties, performance, and corrosion resistance, in particular, high mechanical properties after annealing (tensile strength of at least 400 MPa, yield point of at least 300 MPa, and relative elongation of at least 15%) and high performance in deformation processing; wherein high performance in deformation processing is provided due to the presence of eutectic Fe-containing alloy phases, accompanied by increased mechanical properties due to the formation of compact particles of eutectic phases and secondary separation of the Zr-containing phase with the L12 crystal lattice.

Abstract: The present disclosure relates to aluminum production, more particularly, to a method of breaking an electrolyte crust in reduction cells of all types. According to a disclosed method for breaking electrolyte crust by means of separation cutting in a reduction cell for production of aluminum, the crust is cut and broken by means of the thermal melting of a crust material with a high-speed high-temperature concentrated flow of thermal plasma jet heat energy, for which a directed thermal plasma jet is generated and moved above the electrolyte crust along a predetermined path, a formed molten material is continuously removed from a zone of the thermal plasma jet impact to create in the electrolyte crust a slit with the thermal plasma jet, wherein the slit is enough for of crust continuous separation cutting and breaking.

Abstract: The present invention relates to nonferrous metallurgy, in particular to the electrolytic production of aluminum, more particularly to a structure of a cathode assembly of a reduction cell for production of aluminum. A lining of a cathode assembly of an aluminum reduction cell is provided which comprises a thermal insulation layer and a fire-resistant layer consisting of no less than two sub-layers, wherein the porosity of the thermal insulation layer and the fire-resistant layer increases from an upper sub-layer to a bottom sub-layer and the thickness ratio of the fire-resistant layer and the thermal insulation layer is no less than ?. Also, the present invention provides a method for lining a cathode assembly of a reduction cell and a reduction cell having the claimed cathode assembly lining.

Abstract: The invention relates to the metallurgy field, in particular to the production of aluminium-based cast materials, and can be used for producing crucial components under high-load conditions. The primary application is for components used in automotive engineering, sports equipment, etc. Proposed is an aluminium-based high-strength alloy, containing zinc, magnesium, calcium, metal, titan, and at least one element from the group consisting of silicon, cerium, nickel, zirconium and scandium, using defined concentrations of the constituents. The technical result of the invention is increased strength properties of the alloy and the products made therefrom on account of the formation of secondary precipitates of a strengthening phase by means of dispersion hardening.

Abstract: The invention relates to production of alloys based on aluminum. A method is proposed for producing aluminum-based alloys by electrolysis, according to which low-consumable anode of aluminum pot is used as a source of alloying elements. At the same time, in order to optimize master alloy consumption, one of the following options is chosen: dissolution of alloying elements from slightly soluble anodes; adding oxides and/or fluorides and/or carbonates of alloying elements to electrolyte melt of aluminum pot; simultaneous dissolution of alloying elements from slightly soluble anodes with addition of oxides and/or fluorides and/or carbonates of alloying elements to electrolyte melt of aluminum pot.