Manufacturing method of sandwich plate based on aluminium for bullet-proof welded armour

FIELD: weapons and ammunition.

SUBSTANCE: method consists in obtaining the workpiece to be rolled and its heating, hot rolling of plate according to the size requirements, cooling down to room temperature and artificial ageing. Production of workpieces to be rolled involves rolling according to the size requirements of ingots and/or slabs from aluminium alloys for sandwich plate and assembly of a pack using them. Pack is heated at 500-550°C during 5-7 hours. Rolling according to the size requirements is performed at 410-450°C. Additional hardening is performed at 450-480°C. Artificial ageing is performed at temperature of 110-120°C during 24-36 hours.

EFFECT: improving armour properties and durability of sandwich plate.

5 cl, 1 tbl

 

The invention relates to the field of welded armor designs, in particular, including armour plates, which consist of several layers of metal of different composition, and may be used in mechanical engineering in the creation of objects of protection against small arms fire, shrapnel grenades, etc.

Known layered plate on aluminum base for bullet-proof welded armor, including front, middle and back layers of aluminum alloys, thin layers of a thickness of 1-3% of the thickness of the plate located between the layers and on the outer surfaces of the front and back layers, and the front layer is made thick 4-13% of the thickness of the plate, thin layers made of aluminum alloy containing zinc, silicon, manganese, iron, titanium and impurities in the following ratio, wt.%: zinc 0,80-1,35; silicon 0,08-0,30; manganese 0,015-0,035; iron 0,10-0,40; Titan of 0.03 to 0.18; impurity not more than 0.1; aluminum - rest, the back layer is made thick 4-13% of the thickness of the plate, and at least one of the front, middle or back layer is made of aluminum alloy containing zinc, magnesium, manganese, chromium, titanium, zirconium, copper, iron, silicon and other impurities that are in the following ratio, wt.%: zinc is 4.9 to 5.5; magnesium 1,5-1,9; manganese 0.2 to 0.5; chromium 0,15-0,25; titanium 0,03-0,10; zirconium 0,07-0,12; copper 0,10-0,20; iron ≤0,35; silicon ≤0,25; other impurities ≤0.1; aluminum - rest. the manual manufacture of the specified plate includes assembling a package of sheets of the respective aluminum alloys, heating, rolling in size, trimming edges, hardening, straightening, finishing heat treatment, however, the specific modes of implementation of the method, which determine the performance characteristics of armor plate and welded armor missing.

(EN 2371660, F41H 5/04, C22C 21/10, publ. 27.10.2009).

The closest in technical essence and the achieved technical result is a method of manufacturing a thick-walled plate of aluminum alloys with high strength, including the production of blanks with a thickness of more than 300 mm, heated to a temperature of 470-490°C, homogenization at this temperature, hot rolling plate, the sequential cooling of the laminated plate first to a temperature of 400-410°C, and then to room temperature and artificial ageing. Aluminum alloy plate has the following composition, wt.%: Zn 4,6-5,2; Mg 2,6-3,0, Cu 0.1 to 0.2, Zr 0,05-0,2, Mn ≤0,05, Cr 0.05, Fe≤0,15, Si≤0,15, Ti≤0,10, the remainder aluminum and impurities.

(EN 2351674, C22C 21/10, C22F 1/053, publ. 10.04.2009).

However, the implementation of the known method does not allow to achieve the required level of breasticle and fatigue strength of the layered plates of high strength aluminum alloys, as well as an increased level of corrosion resistance of its welds.

The aim of the invention is to develop a method of manufacturing a layered plate on aluminum base for bullet-proof welded armor with increasing the n level of breasticle and fatigue strength, and with a high level of corrosion resistance of its welds. The technical result is to increase breasticle and durability of laminated plates and welded joints, ensuring continuity between the layers of the plates together.

The technical result is achieved by a method of manufacturing a layered plate on aluminum base for bullet-proof welded armor includes obtaining billets for rolling, heat, hot rolling the slab in size, cooling to room temperature, and artificial aging and the production of billets for rolling includes rolling in the size of the ingots and/or slabs of aluminum alloys for the layered plate and the Assembly of them pack, and heating of the package is carried out at temperatures of 500-550°C for 5-7 hours, rolling in the amount of lead at temperatures 410-450°C, additional training is conducted with the temperature of 450-480°C, artificial aging is carried out at a temperature of 110-120°C for 24-36 hours.

In addition, before rolling in the size of the ingots or slabs of aluminum alloys for the layered plate is milled to a thickness of 150-220 mm; for Assembly of a package use the plate thickness of 25-35 mm of aluminum alloy containing zinc, magnesium, manganese, chromium, titanium, zirconium, copper, iron, silicon and other impurities that are in the following ratio, wt.%: zinc is 4.9 to 5.5; magnesium 1,5-1,9; manganese 0.2 to 0.5; chromium 0,15-0,25; titanium 0,030,10; zirconium 0,07-0,12; copper 0,10-0,20; iron ≤0,35; silicon ≤0,25; other impurities ≤0.1; aluminum - rest, and also leaves 5-7 mm thick aluminum alloy containing zinc, silicon, manganese, iron, titanium and impurities in the following ratio, wt.%: zinc 0,80-1,35; silicon 0,08-0,30; manganese 0,015-0,035; iron 0,10-0,40; Titan of 0.03 to 0.18; impurity not more than 0.1; aluminum - else, while when assembling the package, the sheets of aluminum alloys according to claim 4 is placed on the external sides of the package and between the plates of aluminum alloys according to claim 3.

For comparative evaluation armor and fatigue properties of laminated plate obtained by the method according to the invention were investigated layered plates with a nominal thickness of 30 mm Laminated plate consisted of three layers (front, middle and back) with a thickness of about 9.2 mm each, made of aluminum alloy A, which contained, wt.%: zinc - 5,1, magnesium and 1.7, manganese - 0,35, chrome - 0,18, titanium - 0,74, zirconium - 0,96, copper - 0,15, iron - less than 0.35, silica is less than 0.25, other impurities is less than 0.1, aluminum - rest. Between these layers, as well as on the outer edges of the front and back layers, lay thin layers of thickness of about 0.2 mm each, made of aluminum alloy Acpl, which contained, wt.%: zinc - 0,92, silicon is 0.15, manganese - 0,024, iron - 0.03, titanium - 0,12, impurity not more than 0.1, aluminum - rest.

These layers is made of a plate were obtained in the following technological parameters of the method according to the invention. Bullion ingots of alloy Acpl was preservati during the removal of chips and 9 mm on a side to the receiving sheet with dimensions of 6.0×1200×1480-1700 mm Slabs alloy A 1200×1700 mm was preservati to a thickness of 170 mm, then a slab of alloy A was planirovali leaves alloy Acpl 6,0×1200×1700 mm and subjected to hot rolling in size to a thickness of 30 mm, the Assembly of the package were performed, alternating sheets of alloy Acpl thickness of 6 mm and a plate of alloy A 30mm thick Assembled package was heated at temperatures of 530±15°C for 6 hours. Hot rolling plate (package) is conducted at a temperature 415-440°C to plate thickness 30 mm Additional quenching was performed with temperature 465-475°C after aging for 2 hours. After 7 hours quenching plates were subjected to editing by stretching or bending. Artificial ageing regime T1 conducted at a temperature in the metal 110-120°C for 36 hours.

In addition, before rolling in the size of the ingots or slabs of aluminum alloys for the layered plate is milled to a thickness of 150-220 mm; for Assembly of a package use the plate thickness of 25-35 mm of aluminum alloy containing zinc, magnesium, manganese, chromium, titanium, zirconium, copper, iron, silicon and other impurities that are in the following ratio, wt.%: zinc is 4.9 to 5.5; magnesium 1,5-1,9; manganese 0.2 to 0.5; chromium 0,15-0,25; titanium 0,03-0,10; zirconium 0,07-0,12; copper 0,10-0,20; iron ≤0,35; silicon ≤0,25; other impurities ≤0.1; aluminum - rest, and the sheet thickness is th 5-7 mm of aluminum alloy, containing zinc, silicon, manganese, iron, titanium and impurities in the following ratio, wt.%: zinc 0,80-1,35; silicon 0,08-0,30; manganese 0,015-0,035; iron 0,10-0,40; Titan of 0.03 to 0.18; impurity not more than 0.1; aluminum - else, while when assembling the package, the sheets of aluminum alloys according to claim 4 is placed on the external sides of the package and between the plates of aluminum alloys according to claim 3. In the resulting layered plates were solid adhesion between the layers, providing increased breasticle plates and welded structures.

Tests were performed by standard techniques. Armour properties was determined by firing a bullet 7.62 mm angle α=0° (α is the angle between the trajectory of the bullet and the normal to the plate) with the definition of speed limit conforming defeats (VControl panel). Fatigue properties were determined on the samples section of 30×80 mm, selected from existing and proposed slabs in state T1. The tests were carried out with alternating loading on the basis of 100,000 cycles with a frequency of 10 Hz. Evaluation of resistance to corrosion degradation was performed according to the value of safe levels of stress.

The safe level of stresses σKRtook the stress level, which in the test samples (the structural elements and the like) did not crack during the whole testing period. The results of the comparative test, not only the us in the table.

Table
FeaturesLayered plateThe advantage of the slabs according to the invention
KnownAccording to the invention
Breastaurant VControl panel, m/s.730755above 3.5%
Cyclic durability σu, MPa235340more than 1.45 times.
The safe levels of stress of welded joints σCR, MPa.100160more than 1.6 times.
The safe levels of stress for plate σCR, MPa150230more 1.53 times.

The presented results show that the layered plates for bulletproof armor, obtained by the method according to the invention have a high ponastoyaschimu, as well as have high characteristics on fatigue t is you and the resistance to stress corrosion cracking under tension. Welded connections using laminated plates according to the invention also have a significant advantage in corrosion resistance to destruction.

The use of laminated plates according to the invention in welded bulletproof armor greatly increases its reliability and survivability.

1. A method of manufacturing a layered plate on aluminum base for bullet-proof welded armor, including the production of billets for rolling, heat, hot rolling the slab in size, cooled to room temperature and artificial ageing, characterized in that the receiving billets for rolling includes rolling in the size of the ingots and/or slabs of aluminum alloys for the layered plate and the Assembly of them pack, and heating of the package is carried out at temperatures of 500-550°C for 5-7 h, rolling in the amount of lead at temperatures 410-450°C, additional training is conducted with the temperature of 450-480°C, artificial ageing are at temperatures of 110-120°C for 24-36 hours

2. A method of manufacturing a laminated plate according to claim 1, characterized in that prior to rolling in the size of the ingots or slabs of aluminum alloys for the layered plate is milled to a thickness of 150-220 mm

3. A method of manufacturing a laminated plate according to claim 1, characterized in that to build the package using the plate thickness 25-35 mm of aluminum alloy containing zinc, magnesium, manganese, HRO is, titanium, zirconium, copper, iron, silicon and impurities in the following ratio, wt.%:

zincthe 4.9 to 5.5
magnesiumof 1.5-1.9
manganese0,2-0,5
chrome0,15-0,25
titanium0,03-0,10
Zirconia0,07-0,12
copper0,10-0,20
iron≤0,3 5
silicon≤0,25
other impurities≤0,1
aluminumrest

4. A method of manufacturing a laminated plate according to claim 1, characterized in that to build the package using sheets of a thickness of 5-7 mm of aluminum alloy containing zinc, silicon, manganese, iron, titanium and impurities in the following ratio, wt.%:

td align="right"> 0,08-0,30
zinc0,80-1,35
silicon
manganese0,015-0,035
iron0,10-0,40
titaniumof 0,03 0,18
impuritiesnot more than 0.1
aluminumrest

5. A method of manufacturing a laminated plate according to claim 1, characterized in that during Assembly of the package of sheets of aluminum alloys according to claim 4 is placed on the external sides of the package and between the plates of aluminum alloys according to claim 3.



 

Same patents:

Armoured barrier // 2456532

FIELD: weapons and ammunition.

SUBSTANCE: armoured barrier comprises the first and subsequent corrugates layers, and also screening elements. Each subsequent corrugated layer is turned relative to the first one by the angle φ, defined from the expression φ = π/2(z-1), where z is the sequence number of the corrugated layer. If the number of corrugated layers is higher than two, layers with parallel location of corrugations are displaced in the transverse direction relative to each other by the value a, defined from the following expression R < α < p-2R/2, where R - outer radius of corrugation bend, p - corrugation pitch, at the same time α ≠ p/3. In the space limited with the surface of each corrugation and the appropriate part of the screening element surface there is a low-strength compressible medium with shock-absorbing properties.

EFFECT: improved protection of objects against armour piercing striking elements, action of cumulative weapons and explosively formed penetrators.

2 cl, 3 dwg

FIELD: metallurgy.

SUBSTANCE: proposed plate comprises front, medium and rear layers from aluminium alloys and thin layers of thickness making 1-3% of said plate arranged between aforesaid layers and on outer surfaces of front and rear layers. Note here that said thin layers are made from aluminium alloy containing Zn, Si, Mn, Fe, Ti and admixtures with different ratio of components in wt %. Thickness of front and rear layers makes 3-23% of thickness of plate from aluminium alloy containing Zn, Mg, Mn, Cr, Ti, Zr, Cu, Fe, Si and admixtures. Medium layer is made from aluminium alloy containing Zn, Mg, Mn, Cr, Ti, Zr, Cu, Fe, Si and admixtures, while total content of Zn and Mg making 7.0-10.8 wt %. Laminar armored plate comprises additionally 1 to 3 thin layers dividing rear layer into equal parts.

EFFECT: higher strength and safe stress level σcr in welded structures.

2 cl, 2 dwg,1 tbl

FIELD: weapons and ammunition.

SUBSTANCE: proposed device comprises layer of premature blasting of shaped charge, one row of shutters made from bulk-wicker steel grid, steel layers with, at least, two layers with steel spherical elements arranged at 45…60° to jet direction. Spherical elements are arranged in one or two rows and polymerised in elastic materials, their diameters being 1.5 to 3.0 times larger that jet diameter. Layers from high-strength porous ceramic material filled with chemically active substance with oxidising properties.

EFFECT: decreased weight, larger inner space in armored vehicle.

1 dwg

FIELD: armament.

SUBSTANCE: this invention covers developments of the protective means and can be applied for armoured panel production for armour and staff protection. According to the production method of a polymer composite material aramide fibres set 2 soaked in epoxide bonding agent 3 is pressed with the following matrix modelling 4. Aramide fibres 2 are modelled from multiple fibres 5 consisting of monofibres made of fibrilla. Each fibrilla is additionally attached to the matrix by Van der Waals bridges between amide and imine groups of polyalkylbenzimidazole (PABI) and PABI copolymer of amide fibres and by hydroxyurethane links of a modified low-molecular oligoester with end cyclocarbonate and epoxide groups of the epoxide matrix 4.

EFFECT: enhancement of processibillity, quality of armoured panel and its reliability.

9 cl, 1 tbl, 3 ex

FIELD: technological processes.

SUBSTANCE: invention relates to porous materials and to a method of flaky materials production from polymer tapes arranged in one direction. The flaky material is formed from at least two monolayers of polymer tapes. Tapes have shell and core structure. The method contains the following stages: formation of the first monolayer of polymer tapes by preliminary tensioning of polymer tapes and subsequent arrangement of polymer tapes under tension in parallel in one direction; formation of the second monolayer above the first monolayer in the same manner as the first monolayer was produced, laying at least two monolayers of polymer tapes are laid one onto the other so that the direction of polymer tapes is identical in each monolayer, and so that polymer tapes of each monolayer are displaced relative to the tapes of the adjacent monolayer arranged higher or lower than this monolayer; compaction of thus laid monolayers of polymer tapes to produce a flaky material.

EFFECT: invention provides for simple manufacturing of multilayer products.

20 cl, 4 dwg

FIELD: technological processes.

SUBSTANCE: invention relates to the field of powder metallurgy and may be used to produce highly solid and wear-resistant materials, for instance, for elements of armoured protection or individual protection against small arms and fragments of ammunition. The composite ceramic material represents a multilayer material at least of two main layers made of a mixture of powders of boron carbide and eutectic of titanium diboride and titanium carbide, between which there is a layer of nanosize powder of eutectic of titanium diboride and titanium carbide with particle size of 5-160 nm. The method to make a composite ceramic material consists in mixing of a mixture of powders of boron carbide and eutectic of titanium diboride and titanium carbide with organic binder, forming sheet stocks, laying sheet stocks in a die mould. At least two sheet stocks are laid into a die mould, and between them a stock of nanosize powder of eutectic of titanium diboride and titanium carbide is placed. The thickness of the layer makes 0.03-0.15 of the main layer thickness. Their joint hot pressing is carried out at 1800-2100°C and pressure of 200-300 kgf/cm2 for 20-50 minutes.

EFFECT: when using the proposed material as armoured protection, weight and dimension characteristics are reduced, and the class of protection is preserved.

5 cl, 1 tbl, 10 dwg

FIELD: weapons and ammunition.

SUBSTANCE: steel armour is proposed. Armour consists of combined armoured plate made in the form of monoblock, containing front layer, intermediate layer and rear layer. Front layer is made from high-strength steel with hardness of 58…64 HRC; intermediate layer is made from grain-oriented steel with grain orientation {111} in the sheet plane, and rear layer is made from armoured steel with hardness of 52…56 HRC and thickness of 0.5…1.5 of thickness of front layer.

EFFECT: increasing armour stability level.

FIELD: metallurgy.

SUBSTANCE: laminated protective armour material consists at least of two layers - front and rear one. Front layer is made from steel of the following composition, wt %: carbon 0.28 - 0.55, silicon 0.15 - 0.30, manganese 0.20 - 0.30, chrome 0.30 - 0.60, nickel 0.80 - 1.10, molybdenum 0.10 - 0.30, vanadium 0.05 - 0.15, and iron is the rest. Rear layer is made from steel of the following composition, wt %: carbon 0.15 - 0.27, silicon 0.30 - 0.60, manganese 0.20 - 0.30, chrome 0.70 - 1.10, nickel 0.80 - 1.10, molybdenum 0.10 - 0.30, vanadium 0.10 - 0.25, and iron is the rest.

EFFECT: improving armour protective property of material at simultaneous reduction of thickness of layers.

1 tbl

FIELD: military hardware.

SUBSTANCE: steel armour consisting of composite armoured plate made in the form of monoblock. Armour includes front steel layer, intermediate steel layer and rear steel layer. Front layer is made from high-strength steel with hardness of 58...64 HRC, intermediate layer is made from low-carbon steel with hardness of not more than 20 HRC and thickness of 0.01…0.05 of armoured plate thickness, and rear layer is made from armoured steel with hardness of 52…56 HRC.

EFFECT: improved protective properties of body armour at protection against bullets with heat-hardened cores.

FIELD: weapons and ammunition.

SUBSTANCE: bullet-resistant structure includes the first resistant layer made from high-strength material, coating from thermosetting material, which has been obtained by casting under pressure of that thermosetting material together with the above strong material, where thermosetting coating determines the limits at least of the second layer which is intended to be external in relation to the first strong layer of this structure and has relative low fusion temperature in order to be capable of being fused at bullet penetration and to retain the bullet by preventing its bouncing from rigid layer at impact of that bullet, and the above coating also determines the limits of the third layer located inside in relation to the first layer. Bullet-resistant clothes includes at least one element made from bullet-resistant structure. Protective panel includes bullet-resistant structure.

EFFECT: retention of bullet with thermosetting material and its prevention from being bounced off rigid layer.

21 cl, 14 dwg

FIELD: metallurgy.

SUBSTANCE: invention relates to alloy of AA7000 series and to the manufacturing method of products from this aluminium alloy, and namely to aluminium deformed products of relatively large thickness, namely of 30 to 300 mm. Method involves casting of workpiece - ingot of aluminium alloy of AA7000 series, which contains >0.12 to 0.35% Si, pre-heating and/or homogenisation of workpiece, hot deformation treatment of workpiece using one or more methods chosen from the group, which involves rolling, extrusion and forging, optionally cold deformation treatment, solution treatment, workpiece solution treatment cooling, optional tension or compression or other cold deformation treatment for release of stresses, which is performed by straightening or drawing or by cold rolling, ageing of workpiece in order to achieve the required state. At least one heat treatment is performed at temperature in the range of more than 500°C, but lower than solidus temperature of the considered aluminium alloy. The above heat treatment is performed either: (i) after heat treatment by homogenisation prior to hot deformation treatment, or (ii) after solution treatment, or (iii) both after heat treatment by homogenisation prior to hot deformation treatment, and after solution treatment.

EFFECT: obtaining the product from deformed aluminium alloy, which has improved balance of properties, and namely destruction viscosity, tensile yield point, tensile ultimate strength and relative elongation.

30 cl, 8 tbl, 3 ex

FIELD: metallurgy.

SUBSTANCE: invention refers to alloys on base of aluminium, particularly to Al-Zn-Cu-Mg alloys on base of aluminium, and also to procedure of fabrication of rolled or forged deformed product of it and to rolled or forged deformed product proper. The procedure consists in following stages: a) casting an ingot, containing wt % Zn 6.6-7.0, Mg 1.68-1.8, Cu 1.7-2.0, Fe 0-0.13, Si 0-0.10, Ti 0-0.06, Zr 0.06-0.13, Cr 0-0.04, Mn 0-0.04, additives and other side elements ≤0.05 each, b) homogenising of the said ingot at 860-930°F or, preferably, at 875-905°F, c) hot deformation treatment of the said ingot with temperature at input 640-825°F, but preferably - 650-805°F by rolling or forging to a plate with finish thickness from 2 to 10 inches, d) thermal treatment for solid solution and quenching the said plate, e) drawing the said plate with residual deformation from 1 to 4 %, f) ageing the said plate by heating at 230-250°F during from 5 to 12 hours and 300-360°F during from 5 to 30 hours during equivalent time t(eq) between 31 and 56 hours. Equivalent time t(eq) is determined from formula:

where T corresponds to instant temperature in K during annealing, while Tcontr corresponds to control temperature equal to 302°F (423K), and t(eq) is expressed in hours.

EFFECT: production of deformed product possessing improved combination of mechanical strength for corresponding level of crack resistance and resistance to corrosion cracking under load.

8 cl, 2 dwg, 10 tbl, 4 ex

FIELD: metallurgy.

SUBSTANCE: product consists of following components, wt %: Zn 9.0-14.0, Mg 1.0-5.0, Cu 0.03-0.25, Fe <0.30, Si <0.25, Zr from 0.04 to less, than 0.3 and one or more elements chosen from group consisting of: Ti <0.30, Hf <0.30, Mn <0.80, Cr <0.40, V <0.40 and Sc <0.70, random elements and impurities, each <0.05, totally <0.15, and aluminium - the rest. The procedure for fabrication of product out of aluminium alloy consists in casting an ingot, in homogenisation and/or in preliminary heating the ingot upon casting, in hot treatment of the ingot into preliminary finished product with one or more methods, chosen from the group including rolling, extrusion and forging. Not necessarily, the preliminary treated product can be heated or hot treated and/or cold treated to a required shape of a blank; further formed blank is subjected to heat treatment to solid solution, to hardening blank heat treated to solid solution; not necessarily, hardened blank can be stretched or compressed, or cold treated by other way to stress relief, for example, by levelling sheet products or artificial ageing, till obtaining a required condition.

EFFECT: product with reduced tendency to forming hot cracks and with improved characteristics of strength, fracture toughness and hardness over 180 HB at artificially aged state.

32 cl, 6 tbl, 6 ex

FIELD: metallurgy.

SUBSTANCE: method involves ingot casting with the following composition, wt %: Zn 6.0 - 11.0, Cu 1.4 - 2.2, Mg 1.4 - 2.4, Zr 0.05 - 0.15, Ti <0.05, Hf and/or V <0.25, optionally Sc and/or Ce 0.05 - 0.25%, optionally Mn 0.05 0.12%, and inevitable impurities and aluminium is the rest, homogenisation and/or pre-heating of ingot after casting, hot deformation processing of ingot so that pre-processed product is obtained, heating of pre-processed product and either hot rolling of heated product to final thickness, or hot rolling and cold rolling of heated product to final thickness, heat treatment for solid solution and hardening of heat-treated product for solid solution, optional tension or compression of hardened product and optional ageing of hardened and optionally tensed or compressed product to the desired state; at that, rolled product at its final state has in fact fully non-recrystallised microstructure at least in position T/10.

EFFECT: product has increased yield point at compression and high specific energy of crack propagation, and improved viscosity and corrosion resistance properties.

21 cl, 6 tbl, 3 ex

FIELD: metallurgy.

SUBSTANCE: invention refers to metallurgy and machine building, particularly to procedure of production of items out of high-strength, especially, super-strong aluminium alloys of system Al-Zn-Mg-Cu-Zr used for skin of wing and other power elements of gliders, aircrafts and also for land-based vehicles. The procedure consists in ingot hot rolling, in producing a work-piece, in tempering, in stretch flattening, in preliminary ageing and deformation ageing combined with shaping under a creeping mode. Preliminary ageing is carried out in two stages. At the first stage the work-piece is heated at temperature 95-115°C and conditioned during 3-10 h, at the second stage the work-piece is heated at temperature 120-140°C and conditioned during 2-5 h. Deformation ageing combined with shaping under the creeping mode is performed at temperature 145-165°C and conditioned during 5-10 h at rate of shaping not over 0.5 %/h.

EFFECT: facilitating stable high strength properties of aluminium alloys at sufficient level of corrosion resistance, fracture strength and fatigue strength, which upgrade weight efficiency and resource of item.

2 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: invention relates to nonferrous metallurgy field, particularly to thermal treatment of half-finished products and details made of aluminium alloys Al-Zn-Mg-Cu-Zr, used in the capacity of constructional material for force-summing element in aerospace industry, and also in transportation equipment. It is implemented hardening and artificial three-stage aging, at which at the first stage it is implemented low-temperature heating at temperature 110-125°C with isolation during 1-12 hours, at the second stage - short-term heating with increased temperature 150-168°C with following regulated accelerated cooling up to the temperature 30-40°C at a rate no at least 0.5°C/min, at the third stage it is implemented low-temperature heating at temperature 70-90°C, providing emission of additional fine strengthening phases from supersaturated solid solution.

EFFECT: receiving of products, allowing high strength properties and increased fatigue resistance at high level of corrosion resistance, that provides increasing of weight efficiency and products' useful life.

4 cl, 2 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: presented invention relates to product made of deform high-strength alloy Al-Zn and also manufacturing method of product made of this alloy. Product is implemented for steel containing following ratio of components, wt %: zinc 7.6-9.5, copper 1.3-2.4, magnesium 1.5-2.6, manganese 0.06-0.12, zirconium < 0.20, chrome < 0.10, iron < 0.25, silicon < 0.25, titanium < 0.10, hafnium and/or vanadium < 0.25 and it is not necessary cerium and/or scandium < 0.20, inevitable admixtures - less than 0.05 of each and less than 0.25 in total, the rest - aluminium, with 0.1[Cu]+1.3<[Mg]<0.2[Cu]+2.15. Method of product manufacturing includes ingot casting with above mentioned content, pre-heating of ingot after casting, ingot hot working by pressure and not obligatory fabrication till pressure workpiece, thermal processing to solid solution and hardening of heat-treated to solid solution of product. IT is received product allowing high tensile and improved combination of viscosity and corrosion behavior.

EFFECT: receiving of product allowing high tensile and improved combination of viscosity and corrosion behavior.

27 cl, 11 tbl, 4 ex

Alloy al-zn-mg-cu // 2353693

FIELD: metallurgy.

SUBSTANCE: current invention relates to product made of aluminium alloy containing wt %: zinc 6.5-9.5, magnesium 1.92-2.1%, copper 1.0-1.8, iron < 0.14, silicon < 0.20, preferentially < 0.12, zirconium 0.04-0.3, it is not necessary, one or more from: scandium < 0.7, chrome < 0.4, hafnium < 0.3, manganese < 0.8, titanium < 0.4, vanadium < 0.4 and unintentional impurity < 0.05 each and < 0.15 all together, and the rest is aluminium. Product is manufactured by method including ingot casting, its preheating, hot processing by pressure till receiving of preformed blank by one or more methods, chosen from the group containing of deform, punching and hammering, not necessary reheating of predeformed blank, hot treatment by pressure till the receiving of mould blank of necessary form, thermal treatment to solid solution of mentioned mould blank at temperature and during the time, enough for transfer into solid solution to the point all soluble components in alloy, hardening of heat-treat to solid solution blanks by means of hardening by spray cooling or hardening by water immersion or different hardening compound, optional tension or pressing of hardened workpiece, artificial aging of hardened and optional stretch or compressed workpiece till achieving of desirable condition. IT is received product allowing high tensile and improved combination of viscosity and corrosion behavior.

EFFECT: receiving of product allowing high tensile and improved combination of viscosity and corrosion behavior.

50 cl, 4 dwg, 15 tbl, 8 ex

FIELD: metallurgy.

SUBSTANCE: invention relates to thick-walled plate made of aluminium alloy with high tensile and low sensitivity to quenching and also method of production such thick-walled plates and can be used in motor industry. Plate made of aluminium alloy is received by means of continuous casting of alloy with receiving of blank of thickness more than 300 mm, blank heating till the temperature 470-490°C, blank homogenising annealing at that temperature, hot rolling of homogenised blank with receiving of plate of thickness less than 300 mm or cooling down till the intermediate temperature, which is 400-410°C, aftercooling from intermediate temperature 400-410°C till the temperature less than 100°C, plate cooling till the room temperature and plate artificial aging. Alluminum alloy allows following content, wt %: Zn from 4.6 till 5.2, Mg from 2.6 till 3.0, Cu from 0.1 till 0.2, Zr from 0.05 till 0.2, Mn maximum is 0.05, Cr maximum is 0.05, Fe maximum is 0.05, Si maximum is 0.15, Ti maximum is 0.10, aluminium is the rest and admixtures conditioned by technological process characteristics.

EFFECT: receiving of thick-walled plate, allowing high tensile throughout, with low sensitivity to quenching.

34 cl, 5 dwg, 1 ex

FIELD: metallurgy.

SUBSTANCE: product out of aluminum alloy consisting out of the following elements, mas.%: zinc 6-10, magnesium 1.2-1.9, copper 1.2-2.2; at that one or several elements are chosen out of a group, consisting of zirconium up to 0.4, scandium up to 0.4 and hafnium up to 0.3, at that aluminium and tramp additives- the rest. The said alloy optionally contains titanium up to 0.06, calcium up to 0.03, strontium up to 0.03, beryllium up to 0.002. The product with a large cross section is treated for transforming it into a hard solutuion, then tempered and artificially aged. The product with a small cross section is slowly tempered. There are suggested the following parts fabricated out of the said alloy: an aircraft wing, a structural component and a method of its fabrication, a compartment component of an airlock caisson, a profiled plate, an aircraft wing of a high carrying capacity and an aircraft of a high lading capacity.

EFFECT: products developed for higher characteristics of hardness and improved characteristics of wear and fracture resistance.

119 cl, 14 dwg, 14 tbl, 3 ex

FIELD: metallurgy.

SUBSTANCE: aluminium-based alloy contains the following, wt %: zinc - 6.35 - 8.0, magnesium - 0.5 - 2.5, copper - 0.8 -1.3, iron - 0.02 - 0.25, silicon - 0.01 - 0.20, zirconium - 0.07 - 0.20, manganese - 0.001 - 0.1, chrome - 0.001 - 0.05, titanium - 0.01 - 0.10, boron - 0.0002 -0.008, beryllium - 0.0001 - 0.05, at least one element from potassium, sodium, calcium group in quantity of 0.0001 - 0.01 each, aluminium is the rest; at total content of zinc, magnesium, copper within 8.5-11.0, and that of zirconium, manganese and chrome - within 0.1-0.35. Method involves loading and melting of charge components, flux treatment of molten metal, molten metal purification, further vacuum treatment of molten metal in mixer and casting of ingots; boron is added to molten metal in the form of Al-Ti-Be alloy which is distributed at least one hour before molten metal pouring to mixer along the whole surface area of mixer bottom; at that, mixer is pre-heated to temperature which is by 15-30°C more than molten metal temperature, and vacuum treatment of molten metal in mixer is performed at temperature of 695-720°C, during 45-90 minutes.

EFFECT: invention allows obtaining high-strength aluminium alloys with absence of primary intermetallic compounds, decreased content in them of non-metallic inclusions and dissolved gases, with stable properties and optimum size of grain on basis of standard furnace and process equipment.

2 cl, 3 tbl

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