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Ferromagnetic charge for arc pad welding machine parts made from iron-carbon alloys. RU patent 2448823. |
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FIELD: chemistry. SUBSTANCE: invention relates to machine building and can be used to restore machine parts made from alloyed steel and cast iron. The ferromagnetic charge for arc pad welding machine parts from iron-carbon alloys, which contains carbon, ferrotitanium, ferrochromium, ferrovanadium, electrode marble, fluorpar, silicocalcium, copper powder and iron powder, additionally contains ferrovanadium and copper powder. To ensure stable arcing at low current (reducing the level of welding deformations and stress) and improve magnetic properties of the mixture, magnetic and nonmagnetic components of the charge are mixed on liquid sodium glass. EFFECT: improved mechanical and tribotechnical properties of the weld metal.
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Method of reconditioning tillage equipment working tools with complex shape / 2443531 Invention may be used in reconditioning tillage equipment working tool surfaces with complex shape. Worn-out area is prefilled by electrodes made from wear resistant material to perform closing by fusion in one pass by electric arc manual or semiautomatic method to ensure maximum possible tracing of working surface. |
Method of increasing life of tillage equipment working tools / 2443524 Invention may be used in reconditioning tillage equipment working tool surfaces. Rolls are welded on perpendicular to axis of beam-like wear, spaced apart for 20-30 mm to produce spacing between them. Roll height does not exceed the level of working surface of the part being reclaimed. Said spacing is filled in operation by soil that acts as anti-abrasive medium. |
Method of reconditioning center hoes of tillage row-crop cultivators / 2443523 Invention may be used in reconditioning tillage equipment working tool surfaces. Metal stock is formed in point area and along blade length by electric arc deposition by electrode to produce buffer stock of built-up metal that allows recovery of rated sizes of hoes. Building-up may be carried out both manually and mechanically by electric arc deposition. Hoe is drawn out by hot deformation using forming mandrel that follows hoe point and blade shape. Further hardening is performed by quenching. In buffer metal building-up and drawing-out, thermal processes occur to bring about structural components that increase hardness of reconditioned zone and facilitate increasing resistance to abrasive wear. |
Procedure for production of built-up coating on blade body of turbo-machine / 2434973 Strips of alloyed metals are built-up in direction of lengthwise generatrix of blade body ensuring gaps between built-up strips at least on part of blade body and forming layer. As built-up metal there are used alloys on base of nickel with Co, Cr, Al, Mo, W, Ti, Y or their combination. Further, a blade body is mechanically processed ensuring its specified geometry. Successive thermal treatment corresponds to thermo-cycling. |
Turbo machine labyrinth seal repair / 2432244 Invention relates to recovery of turbo machine worn-out labyrinth seals and may be used in repair of various assembly units and parts with such seals, for example, vanes, carcass assembly in aircraft industry, power generation equipment and other machine building branches. Said seals are building-up welding with welding head and filler wire. Welding roll is produced on inclining welding head with filler wire toward part section that features higher heat dissipation. Note here that inclination of welding head with filler wire relative to labyrinth seal knife edge is set between planes of their symmetry to make 8-10°. |
Surfacing method of wear-resistant coatings / 2429954 Surfacing is performed on the flux layer with wire from aluminium or its alloys. Flux containing chrome oxide and cryolite is used with the following component ratio, wt %: chrome oxide (III) 25-35, cryolite 65-75. Surfacing is performed in shielding gases in the modes allowing to obtain the coating containing 10-40 wt % of aluminium. |
Method of building up antifriction layers / 2427455 Invention may be used in building up antifriction layers on surfaces of parts made from titanium alloys, particularly, ship fixtures. Automatic argon-arc building up of "ПТ-7М"-grade titanium alloy wire at built-up metal temperature of 1500-1550°C and roller pressure of 80-100 N. |
Flux material for electroslag welding or facing with restoration of components or electroslag remelting / 2424091 Invention relates to welding industry, particularly to electroslag welding or facing and can be used to restore components with high mechanical wear, as well as for producing special quality tool steel via electroslag remelting. The flux material contains a scheelite concentrate as a doping and slag-forming component, with the following content of basic components, wt %: tungsten oxide 45-72, iron oxide 10-25, manganese oxide 2-10, silicon oxide 3-8, graphite as a reducing agent, calcium fluoride as a fluxing agent, baddeleyite concentrate as a modifier, with the following content of basic components, wt %: zirconium oxide 92-96, silicon oxide 4-8, with the following ratio of flux components, wt %: scheelite concentrate 65-72, baddeleyite concentrate 0.5-3.0, graphite 14-18, calcium fluoride 16-20. |
Procedure for forming discrete welded coating on blade body of turbo-machine / 2420610 Procedure consists in local pad weld of coating on at least part of blade body and in dimensional processing. Regularly distributed crossing strips are pad-welded along surface of the blade body and form a net at their crossing. |
Building up of wear resistant coats / 2416501 Invention may be used in applying coats of titanium alloys on parts operated in friction, impact loads etc. Wear resistant coat is applied using consumable electrode in atmosphere of protective gas. Welding wire from titanium alloys is used as consumable electrode without whatever extra processing. Built-up hardness results from doping built-up metal by oxygen added to protective inert gas. Oxygen content in gas mix makes up to 20%. Said oxygen content allows built-up metal hardness approximating to 5400 MPa. |
Flux-cored wire / 2446930 Invention can be used for electroslag facing of instruments and articles working in abrasive wear conditions. The flux-cored wire consists of steel cladding and powder charge in the following ratio, wt %: nickel 3…5; chromium 8...12; titanium diboride 10…30; titanium carbonitride 0.1…0.6; graphite 1…3; steel cladding - the rest. The powder charge fill factor of the wire is equal to 55%. Titanium carbonitride (TiCN) is added to the powder charge in form of nanopowder. Titanium diboride (TiB2) powder has particle size 30…100 mcm. |
Method of producing electrode paste / 2445198 Invention relates to production of electrodes for electric arc welding of articles made from carbon and low-alloyed steels. Main component (S) is added to water solution of alloying component salt (L) with concentration of 2-50 g/l at S:L = 1:5-10. Main component represents component selected from the group including phlogopite, muscovite, sungulite, rutile concentrate, iron-ore concentrate, and feldspar concentrate. Alloying component represents component selected from the group including chromium, manganese, strontium, and rare-earth elements while alloying component salt represents chloride, nitrate, and sulphate. Portion of liquid glass is added into formed suspension in amount of 1-5 wt % and held on mixing at 15-90°C for 1-5 h for obtaining alloyed fusion mixture sediment. Said sediment is rinsed by water and dried at 95-105°C. Dried alloyed mix is added, on mixing, to remaining liquid glass. |
Agglomerated flux of the 48ll-59 mark of origin applied for the automatic welding of pipe steel of the -90- -100 categories / 2442681 Invention can be applied to the automatic welding of the low-alloy cold resistant overstable steels with low-alloy leads at high speed; the flux has the following composition (%, mass): quartzy sand 2.0-10.0; electrocorundum 20.0-33.0; calcium fluoride 11.0- 46.0; sphen concentrate 25.0-35.0; metallic component 7.0-11.0; natrium-kalium silicate 7.7-20.0; the metallic component has the following composition (%, mass): Fe 18.0-21.0; B 0.3-0.5; Mn 55.0-65.0; Al 4.0-6.0; Mg 4.0-6.0; Ti 6.0-10.0; Si 2.0-4.0. |
Active basis of flux for low temperature brazing / 2441737 Invention can be used for low temperature brazing of non-ferrous metals and their alloys, for example, copper, with tin-lead solders in production of radiators, heaters, heat exchangers and other automobile equipment. Active base of the flux includes a mixture of salts of 4-amino-1, 2, 3-triazol bromine acids, 1, 2, 3-triazol bromine acids, imidazole bromine acids, 5-amino-tetrazol bromine acids, benzene azimide bromine acids, hydrazin bromine acids, semicarbazide hydrobromide. The salts of organic polynitrogen bases used have linear or cyclic structure and include 2 or more atoms nitrogen. One or several of them is a strong base ensuring flux neutrality. |
Amorphous cesium-aluminium-fluoride complex, its production and application / 2438846 Invention may be used in producing flux for soldering of aluminium. Proposed method comprises the following steps: (a) binding cesium fluoride dissolved in water with solid aluminium fluoride to add additives thereto consisting of acid or basic compounds to set final product amorphy; (b) additive are added thereto consisting of acid or basic compounds to set required final product basicity or acidity; (c) creating high vacuum after fast evaporation of water contained in reactor; (d) dehydrating the product at high temperature and low vacuum. |
Solder paste / 2438845 Invention can be used for surface mounting of radio components and integrated circuits on printed-circuit boards. The solder paste contains 80-91 wt % solder alloy powder and 9-20 wt % flux-binder. The flux-binder has components in the following ratio in wt %: synthetic resin based on natural components 30-60, mixture of organic solvents in form of esters 30-60, activators in form of a mixture of organic acids 1-8, a rheologic additive in form of plant wax carnauba 1-15. Substances contained in the solder are environmentally safe, are based on natural biodegradable material which is not harmful to the environment, have very low or do not have any smell at all, do not contain amines, surfactants and water. After soldering with the solder paste, flux residue at the soldered joint contain a minimum number of ions, which provides high surface electrical resistance for a long period. |
Solder paste / 2438845 Invention can be used for surface mounting of radio components and integrated circuits on printed-circuit boards. The solder paste contains 80-91 wt % solder alloy powder and 9-20 wt % flux-binder. The flux-binder has components in the following ratio in wt %: synthetic resin based on natural components 30-60, mixture of organic solvents in form of esters 30-60, activators in form of a mixture of organic acids 1-8, a rheologic additive in form of plant wax carnauba 1-15. Substances contained in the solder are environmentally safe, are based on natural biodegradable material which is not harmful to the environment, have very low or do not have any smell at all, do not contain amines, surfactants and water. After soldering with the solder paste, flux residue at the soldered joint contain a minimum number of ions, which provides high surface electrical resistance for a long period. |
Coating of electrodes for welding of carbon and low-alloyed steels / 2433027 Invention may be used for electric arc welding of products from carbon and low-alloyed steels. The electrode coating contains the following components, in the given ratio, wt %: marble 20-45, fluorspar 2-18, ferrosilicon 5.5-8.0, ferromanganese 6.0-8.5, mineral alloy 22-48. The mineral alloy contains the following components in the given ratio, wt %: nepheline concentrate 10-52, sphene concentrate 5-55, marble 17-35, fluorspar 13-22. The mineral alloy may additionally contain one or more components selected from the group containing quartz, alumina, titanium dioxide, periclase and potash, in the amount of 6.9-40.0 wt % over 100%. |
Flux cored wire / 2429957 Invention can be used during electric arc surfacing of wear-resistant alloys on the parts operating in conditions of intensive wear at increased temperatures (up to 900°C) with impact loads, for example, parts of hot deformation pressing tool and hot rolling rolls. Wire consists of low-carbon steel cover made from armco iron and powder charge. Wire contains the following component ratio, wt %: nickel 11-13.5; molybdenum 3-5.5; chrome 3-5.5; ferrosilicium 0.8-2.5; ferrovanadium 1.5-3.5; titanium 0.5-1.0; aluminium 0.5-1.0; boron carbide 0.5-1.5; titanium diboride 1.5-2.5; zirconium diboride 0.5-1.5; sodium silicofluoride 0.5-1.0; iron powder 0.5-14.5; steel cover is the rest. Surfacing can be performed under fluoride fluxes or in argon. Neat metal powders are used for production of flux cored wire. Depending on the surfacing method, the charge composition is varied considering alloy transfer efficiencies to surfaced metal. |
Electrode for manual arc welding of pearlite steels / 2428291 Invention may be used for manual welding of low-alloy pearlite steels, particularly, those of grades "10ГН2МФА", "15Х2НМФА", "15Х2НМФАА", "15ХX3НМА", and "15Х3НФАА", operated at temperatures of up to 350°C. Electrode comprises low-alloy steel coated rod. Coat comprises the following components in wt %: marble - 35-40, blue john - 12-17, rutile concentrate - 10-16, titanium dioxide - 3-5, ferrosilicon - 4-7, ferrotitanium - 5-7, manganese - 3-7, graphite - 0.1-0.3, hematite - 1.0-3.0, mica - 1.0-3.0, plasticiser - 1.0-3.0, iron powder making the rest. Relation between graphite content and total content of hematite and mica makes 0.02-0.10. Electrode rod may be made from, for example, "Св-10ГН1МА"-grade wire. Electrode rod coat plasticiser may contain, for example, potash. |
Parts with aluminum-silicon alloy coating / 2243865 Invention can be used at soldering of parts manufactured of aluminum and its alloys. Coating is formed by application and heating of hexafluosilicate of alkaline metal. Use is made of pure hexafluosilicate of alkaline metal or mixture of hexafluosilicated of alkaline metal with fluoroaluminate in amount of maximum 5 mass % in terms of used hexafluosilicate of alkaline metal. Coating is applied to article by dry or wet flux application method nonobligatorily with binder or film former. Corrosion-resistant layer of potassium fluoroaluminate formed simultaneously provides effective protection of alloy from subsequent oxidation. |
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