Method of blades forgings manufacturing from titanium alloys

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

 



 

Same patents:

Turbine airfoil // 2554737

FIELD: transport.

SUBSTANCE: turbine airfoil comprises aerodynamic body, heat protection system existing in coated surface zone and uncoated surface zone with no heat protective coat. Uncoated surface zone extends on airfoil outer surface lower pressure side from trailing edge to leading edge up to interface between surface coated zone and surface uncoated zone. Said interface is located at lower pressure side between leading edge and trailing edge while airfoil body comprises step in outer surface extending along said interface. Another invention of the set relates to turbine guide or working vane with abode described turbine airfoil.

EFFECT: better aerodynamics, longer life.

24 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: for production of said blade, 3D single-piece fibrous workpiece is woven. Fibrous workpiece is shaped to get single-piece fibrous preform with first, second and third parts. First part makes the blade root and butt preform while second part makes the preform of blade inner flange and/or blade outer flange edges. Third part makes the preform of blade inner flange fixture and/or blade outer flange streamlined ledges. Then, fibrous preform is compacted to get the blade of composite with fibrous structure composed by preform and compacted by die. Another invention relates to turbo machine blade from composite including fibrous structure produced by 3D weaving of threads and compacted by die. Said structure has first part making the integral combination with second and third parts. First part makes blade root and butt, second part makes the blade inner flange and/or blade outer flange ledges while third part makes the fixture of inner flange and/or streamlined ledges of the blade outer flange. Parts of fibrous structure corresponding to the first, second and third parts of the blade interweaving threads of fibrous structure first part penetrating into fibrous structure second part. One mote invention of the set relates to turbo machine equipped with aforesaid blade or including blades made as described above.

EFFECT: higher reliability of turbo machine blades.

17 cl, 22 dwg, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to production of metal reinforcing part (30) of turbomachine leading or trailing edge (10). Proposed process comprises fabrication of several elements (30a, 30b, 30s, 30d) with V-like cross-section. Said elements form different sectors of reinforcing part (30) distributed between its root (32) and top (34). Said sectors are places on appliance (40) that reproduces the shape of said edge. Said sectors are connected to make a complete profile of reinforcing part (30) with recombination of different sectors. To make said reinforcing part (30), appliance (40) is used composed of interconnected detachable sectors that make the surface reproducing the shape of leading of trailing edge of turbomachine blade.

EFFECT: perfected method.

13 cl, 6 dwg

FIELD: metallurgy.

SUBSTANCE: protective coating for protection of a structural component of a gas or a steam turbine against corrosion and/or oxidation, namely at high temperatures, which is made in the form of a single metal layer from an alloy containing the following, wt %: cobalt 24-26, chrome 12-14, aluminium 10-12, and 0.2-0.5 of at least one element of the group including scandium and rare-earth elements, and nickel is the rest. The coating has no tantalum, rhenium and silicone.

EFFECT: coating is characterised by high properties of resistance to high-temperature corrosion and oxidation.

4 cl, 5 dwg

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, and namely to nickel-based alloys to manufacture mechanical components of the turbomachines. Nickel-based super alloy for the mechanical component of the turbomachines contains, wt %: chrome - from 3 to 7, tungsten - from 3 to 15, tantalum - from 4 to 6, aluminium - from 4 to 8, carbon below 0.8, nickel and admixtures - rest. Mechanical components made from the specified alloy can operate under high temperatures.

EFFECT: alloy is characterised by high mechanical, chemical and thermal strength.

10 cl, 8 dwg

FIELD: process engineering.

SUBSTANCE: invention can be used for production of turbine moist-steam stage blades. Wear-resistant stellite strap is welded n steel blade leading edge. Note here that refractory solder powder mixed with antioxidant flux is filled in between cleaned contact surfaces of said parts, joint is heated to solder fusion point and strap is pressed to the blade unless solder is solidified after termination of heating. Portion of solder is pre-applied in thin ply on both surface by arc doping using the solder bar as doping electrode. Depth of said solder makes 40-190 mcm. Arc doping is executed at single pulse power of 0.3-0.7 J and specific doping interval of 0.5-1.0 min/cm2. Solder pre-application is performed preferably in vacuum or inert gas.

EFFECT: longer life of blades subjected to impact-drop effects.

2 cl

FIELD: engines and pumps.

SUBSTANCE: outlet straightener vane for the turbojet engine contains extended single-block front and back sections, and also external layer, joined together by hot pressing. The extended single-block front section is cut out from the pultruded profile, containing resin-impregnated fibres, and forms a front edge of the vane. The extended single-block back section is cut out from the pultruded profile, containing resin-impregnated fibres, and forms a back edge of the vane. The external layer is made on the basis of resin-impregnated fibres and located between the front and back edges with forming of lateral sides of the vane. The external layer overlaps the zones of the front and back edges. Another invention of the group relates to the turbojet engine containing multiple vanes, mentioned above, each of which is fixed on the housing.

EFFECT: group of the inventions allows to simplify manufacture and installation of the vane of the turbojet engine.

15 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: nozzle element is made of composite including fibrous reinforcement compacted by ceramic matrix. It comprises sections of inner and outer bases and at least one blade attached thereto. Base sections extend at every zone of their attachment to the blade. Fibrous reinforcement comprises fibrous structure woven by 3D or multiple ply weaving that features continuity in the entire volume of nozzle element and over the entire periphery of one or every blade. Solid fibrous blank is woven that contains in lengthwise direction, at least the following elements: one pattern including first segment that makes the blade preform blank, second segment extending the first one at its one lengthwise end to make two wings facing each other. Third element extends the first one at its opposite end to make two wings facing each other. This blank is turned to make wings of the second and third segments extend perpendicular to first segment. Blank shape is developed to make fibrous preform of nozzle element. Note here that blade part making the preform is produced by shaping the first segment. Parts that make the preforms of base sections are produced from wings. Then, preforms are compacted by matrix to make a solid nozzle element with fibrous reinforcement. Fibrous reinforcement comprises fibrous structure that features continuity in the entire volume of nozzle element and over the entire periphery of one or every blade. Other inventions of the set relate to turbine nozzle made as described above and to gas turbine with such nozzle.

EFFECT: higher mechanical properties.

15 cl, 30 dwg

FIELD: machine building.

SUBSTANCE: fan rotor blade comprises an airfoil and a tang made from composite material, and a metal shell. The blade tang is made at the base end of the blade airfoil and can be coupled with the groove of a fan disk. The metal shell is attached to the leading edge of the blade airfoil and passes in the direction of the span to protect its leading edge. The metal shell comprises a base part and a pair of connecting flanges extending from its back edges. The metal shell is divided into a base shell segment on the side of the base end of the blade airfoil and an upper shell segment on the side of the upper end of the blade airfoil smoothly extending from the base segment. The length of the upper segment does not exceed the length of the base shell segment in the span direction. The length k of the base part of the shell in the supposed point of the impact amounts to 10% ≤ k ≤ 60% of the chord, and the supposed impact point is located at the distance of 80% of the span from the base shell end. The length m of the shell along the end face edge of the fan rotor blade amounts to m ≥ 40% of the chord. Another invention of the group relates to a fan comprising a disk with a variety of connection grooves on its external periphery and set inside the engine case as well as a variety of the above fan rotor blades coupled with the variety of the connection grooves.

EFFECT: group of inventions allows for the protection of a blade made from composite material against being damaged by a foreign item without significant increase of its weight and deterioration of aerodynamic characteristics.

6 cl, 6 dwg

FIELD: metallurgy.

SUBSTANCE: metal coating of nickel-based alloy for gas turbine parts contains γ and γ' phase and, optionally, β phase. Note here that said alloy contains the following substances, in wt %: tantalum - 0.1-7.0, cobalt - at least 1, chromium - 12-22, preferably, 15-19, aluminium - 5-15, preferably, 8-12. Note also that this alloy does not, preferably, contain silicon (Si) and/or hafnium (Hf) and/or zirconium.

EFFECT: high thermomechanical properties, resistance to oxidation, longer life.

12 cl, 5 dwg

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, in particular to the method of fabrication of thin sheets from two-phase titanium alloy with microcrystalline structure which, in particular, is suitable for superplastic heat deformation. The method includes furnace charge preparation, ingot smelting, ingot deformation in a slab in three stages, slab machining, slab rolling for semifinished rolled products, cutting of semifinished rolled products into work pieces, rolling of work pieces into sheets, heat treatment and moulding. The titanium alloy ingot is melted which contains wt %: 3.5-6.5 Al, 4.0-5.5 V, 0.05-1.0 Mo, 0.5-1.5 Fe, 0.10-0.2 O, 0.01-0.03 C, 0.005-0.07 Cr, 0.01-0.5 Zr, 0.001-0.02 N, the rest is titanium, with the strength of aluminium [Al]eqstr=6,011,55 and molybdenic [Mo]eqstr=3,55,6 equivalents.

EFFECT: obtaining of high-strength sheet products with the thickness < 3 mm with high plastic properties at the room temperature and suitable for SPD when heating.

5 cl, 4 dwg, 3 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to vacuum-chemical hardening of parts. Proposed process comprises preliminary annealing, mechanical processing and alphanising. Alphanising is carried out in electric furnace at 760÷780°C in vacuum of 10-1÷10-3 mm Hg for 1.5÷2 h. Then, the part is cooled, first, in vacuum together with furnace and, then, in atmospheric air to get alphanised 0.007-0.02 mm deep ply that features hardness of 600-900 HV.

EFFECT: simplified and accelerated process, higher surface hardness, non-polluting process.

2 dwg

FIELD: technological processes.

SUBSTANCE: invention relates to rolling and may be used in manufacturing of armoured sheets from (α+β)-titanium alloy. The method to manufacture armoured sheets from (α+β)-titanium alloy includes preparation of charge, melting of a bar with the following composition, wt %: 3.0-6.0 Al; 2.8-4.5 V; 1.0-2.2 Fe; 0.3-0.7 Mo; 0.2-0.6 Cr; 0.12-0.3 O; 0.010-0.045 C; <0.05 N; <0.05 H;<0.15 Si; <0.8 Ni; balance - titanium. Further the bar is shaped into a slab, which is mechanically processed and rolled for semi-finished rolled products, the semi-finished rolled products are cut into stocks and rolled in stages for sheets, and then thermal treatment is carried out.

EFFECT: sheets are characterised by high strength and ballistic properties.

3 cl, 2 dwg, 3 tbl

FIELD: metallurgy.

SUBSTANCE: invention refers to metallurgy, particularly to titanium alloys with enhanced ballistic and mechanical properties. Titanium alloy includes mainly the following components, wt %: aluminium 4.2-5.4, vanadium 2.5-3.5, iron 0.5-0.7, oxygen 0.15-0.19, and the rest is titanium.

EFFECT: titanium-based alloy obtained from recycled materials shows minimum ballistic limit V50 of ca 1848 ft/sec, and high characteristics of yield strength, tensile strength and elongation.

23 cl, 6 dwg, 4 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: deformation of a peripheral part of a billet is performed by rolling with rolls at the superplasticity temperature in the deformation zone so that a sheet is formed. The central part of the billet is cooled down prior to rolling-off to the elastic deformation temperature. During the rolling-off process, the central part of the billet and the sheet subject to non-contact deformation is cooled down by action of a cooling medium on the central part. Cool-down of the sheet to its elastic non-contact deformation temperature is provided in a zone adjacent to the central part. Between the specified zone and the deformation zone, an intermediate zone is formed, in which temperature obtains an average value between elastic deformation temperature and superplasticity temperature and/or values close to the specified average value. In the rolling-off process, cooling medium pressure is increased with expansion of the cooled zone of the sheet. Intermediate zone temperature is maintained.

EFFECT: improving quality of manufactured parts and enlarging technological capabilities of their manufacturing method.

3 cl, 6 dwg, 7 ex

FIELD: metallurgy.

SUBSTANCE: method includes billet deposit and further torsion ensuring shear deformation. The billet deformation is made in Bridgman peens with specific pressure 3-6 GPa application. The movable peen is rotated relatively to its axis with speed 0.02-1.5 rpm. During the peen rotation the cyclic change of the specific pressure is performed by 10-20% of current value with rate 0.1-1.5 of specified speed of the peen rotation.

EFFECT: cyclic load application at intensive plastic torsional deformation ensures uniform microstructure and increases strength and microhardness of the billet material.

4 cl, 5 dwg, 1 tbl

Titanium material // 2544976

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to titanium materials with high strength and processibility. Titanium material contains iron 0.60 wt % or less and oxygen 0.15 wt % or less, titanium and inevitable impurities are the rest. Material has a non-recrystallised structure formed by processing accompanied by plastic deformation and a recrystallised structure formed by annealing after the above treatment; average size of recrystallised α-grains is 1 mcm or more and 5 mcm or less, and surface area of the non-recrystallised part in a cross section of titanium material is more than 0 to 30%.

EFFECT: material is characterised by high strength and processibility.

2 dwg, 2 tbl, 45 ex

FIELD: metallurgy.

SUBSTANCE: manufacturing method cold-deformed pipes from α- and pseudo-α-alloys based on titanium involves melting of an ingot, forging of an ingot in β- and α+β-region with ending of forging in α+β-region into an intermediate shell with forging reduction of 2 to 3; piercing is performed at the temperature that is by 30-50°C higher than Tpp, by multiple-cone rolls and a mandrel with the specified geometry with water supply to a deformation zone, rolling of the shell is performed at the temperature that is by 10-90°C lower than Tpp; straightening of the pipe shell is performed at the temperature of 350-400°C, cold rolling is performed with drawing coefficient of 1.5-4.5 at several stages by alternation with intermediate annealing processes at the temperature equal to 600-750°C, and further heat treatment with the ready dimension at the temperature of 580÷650°C.

EFFECT: high mechanical properties of manufactured pipes, as well as high quality of pipe surface.

4 dwg, 3 tbl

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to a method for obtaining technically pure nano-twinned titanium material. The method for obtaining technically pure nano-twinned titanium material involves casting of technically pure titanium material containing not more than 0.05 wt % N, not more than 0.08 wt % C, not more than 0.015 wt % H, not more than 0.50 wt % Fe, not more than 0.40 wt % O and the rest is not more than 0.40 wt %; cast material is brought to the temperature on the level of or below 0°C and plastic deformation is performed at this temperature in such a degree that nano-twins are formed in the material.

EFFECT: material is characterised by high strength and ductility characteristics.

15 cl, 6 dwg, 4 tbl, 4 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of long articles from titanium or its alloy or blanks of such articles. Proposed method consists in preparation of titanium or titanium alloy mix (10), melting said mix by electric arc at scull melting (20), casting of one or several ingots, primarily cylindrical in shape, in diameter smaller than 300 mm from said fused mix (30). Then, said ingots are drawn at 800-1200°C at draw bench (40) for application in, for example, aircraft engineering.

EFFECT: higher quality, simplified production.

13 cl, 3 dwg

FIELD: metallurgy.

SUBSTANCE: method includes billet deposit and further torsion ensuring shear deformation. The billet deformation is made in Bridgman peens with specific pressure 3-6 GPa application. The movable peen is rotated relatively to its axis with speed 0.02-1.5 rpm. During the peen rotation the cyclic change of the specific pressure is performed by 10-20% of current value with rate 0.1-1.5 of specified speed of the peen rotation.

EFFECT: cyclic load application at intensive plastic torsional deformation ensures uniform microstructure and increases strength and microhardness of the billet material.

4 cl, 5 dwg, 1 tbl

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