High-strength heat-treatable aluminium alloy and article made thereof
SUBSTANCE: invention relates to high-alloyed superhard alloys based on aluminium of Al-Zn-Mg-Cu system to be used as a structural material in aircraft engineering and rocketry, surface vehicles and instrument making. This alloy and article made thereof contain the following components, wt %: zinc - 8.5-9.3, magnesium - 1.6-2.1, copper - 1.3-1.8, zirconium - 0.06-0.14, manganese - 0.01-0.1, iron - 0.02-0.10, silicon - 0.01-0.05, chromium - 0.01-0.05, beryllium - 0.0001-0.005, hydrogen - 0.8·10-5-2.7·10-5 and at least one of elements of the group including titanium - 0.02-0.06, boron - 0.001-0.01, aluminium making the rest. Total content of zinc, magnesium and copper may not exceed 12.5-13.0%. Total content of transition metals, i.e. zirconium, manganese and chromium may not exceed 0.25-0.30%. Iron-to-silicon should make at least 1.5.
EFFECT: higher strength and crack resistance.
5 cl, 2 tbl, 1 ex
The invention relates to ferrous metallurgy alloys based on aluminum, namely high-alloy high-strength alloys of Al-Zn-Mg-Cu, used as a structural material for the main (usually lengthy) power components of the airframe of the aircraft (skins and stringer set the top wing, struts, beams, etc.), missiles, as well as for products of vehicles (mainly terrestrial) and instrument-Laden equipment.
Well-known series of modern common high and ultra high strength alloys for various purposes traditional system Al-Zn-Mg-Cu, and additionally effectively doped microtubule transition element zirconium to improve the ductility, fabricability (including hardenability, strength.
These include, first of all, the Russian high strength alloy (patent RF №2165995 C1, 05.10.1999) to the viscosity of the fracture containing the following components, wt.%:
|Zinc||6.35 mm to 8.0|
|Iron||Of 0.06 to 0.26|
American alloy 7085 company "Alcoa" [New Generation High-strength and High Damage Tolerance 7085 Thick Alloy Product with Low Quench Sensitivity Proc. of the ICAA-9, 2004, p. 969-974] has the following chemical composition, wt.%:
German company Otto Fuchs has developed a new alloy 7037 [A New High Strength Aluminum Alloy for Aerospace Application. Proc of the ICAA-11, 2008, p. 209-214] chemical composition, wt.%:
These alloys are stronger than were previously entered and used alloys with zirconium (7010, 7050), but have a low level of static strength and specific characteristics of strength, not allowing to achieve full performance, increase the weight efficiency products to improve fuel efficiency, range, speed and altitude, payload, etc.
Common to �quiet alloys, they are primarily available for massive (thickness 150-200 mm) semi-finished products in relation to complex products internal power set (spars, fittings, etc.) and should have low sensitivity to the cooling rate during quenching.
It should be noted that among these alloys alloy European 7037 more alloyed with zinc (for high strength), but little is alloyed with copper. But he has a high limit the contents of manganese and silicon, resulting in additional gross harmful excess intermetallics and secondary dispersoids and deterioration of service characteristics.
In the patent U.S. company Alcoa (U.S. patent No. 7097719 B2, 29.08.2006) described high-strength alloy for different foods, including long length, thickness up to 76 mm with improved resistance to fatigue (due to the regulation of impurities) of the following chemical composition, wt.%:
|Magnesium||1.8 to 2.3|
The main disadvantage of this alloy is its high content of copper (2.0%), which causes excessive coarse unfavorable phases: soluble (type phase S - Al2CuMg) and insoluble of different composition (as a result of active interaction of copper with an admixture of iron). This may also include the lack of ductility in the cast state and, accordingly, the tendency to the formation of cracks in the ingot, especially for large flat rolled semi-finished products.
For highly loaded parts in Russia created a high-alloy high-strength alloy based on aluminum (patent RF №2164541 C2, 05.02.1999), which is very important for static strength characteristics.
The alloy has the following chemical composition, wt.%:
In accordance with the objectives of the alloy is heavily doped, including magnesium and copper, which ensures high values of static and structural strength. However, such doping, as well as the presence of increased maximum content of impurities is not desirable for the alloy with special requirements for the combination of the strength characteristics of the fracture, corrosion, and other properties required for aircraft and other structures.
The closest in chemical composition to the present invention is a high strength alloy 7056 (Recently-developed aluminium solutions for aerospace applications. Proc. of ICAA-10, Canada, 2006, p.p. 1271-1278.), containing, wt.%:
|Copper||1.2 to 1.9|
The disadvantages of this high alloy (mainly for elements of aircraft structures) are as follows:
- high and ultra-high strength is ensured by the strong doping of the main components (zinc, magnesium, copper) at the unrestricted maximum amount (to 13.9%), higher total limit their solubility in solid aluminum solution (for maximum strength), and leads to the formation of excess coarse soluble intermetallic compounds and, consequently, to lower the characteristics of crack resistance, ductility, fatigue resistance;
- insufficient limitation of impurities of iron, silicon and transition elements titanium, manganese causes the formation of insoluble coarse eutectic and primary intermetallics and secondary dispersoids, also leads to lower required operating characteristics (fracture toughness, etc.), especially without regulation of their relations; the latter additionally provides obtaining large-size ingots as a result of formation of crystallization cracks;
- SOS�AB alloy does not create optimal conditions for the formation of the structure and the required range of performance critical structures, such as plating and stringers of the wing, aircraft stands, etc., required for modern and future aviation-related products.
The technical object of the present invention is to provide an alloy with improved mechanical properties, combined with the required level of performance needed to power components of the airframe, missile and other products, with sufficient traditional methods of manufacturability to produce various wrought semi-finished products, particularly long.
The technical result of the present invention is to increase the strength characteristics and fracture toughness.
To achieve the technical result of the proposed high-strength alloy based on aluminum, including the basic components zinc, magnesium, copper at their regulated limit, additives of transition metals zirconium, manganese, chromium, also when regulated limits, the ratios of trace elements iron, silicon and at least one element from the group comprising titanium and boron, characterized in that it additionally contains beryllium and hydrogen in the following ratio of components, wt.%:
And at least one element from the group:
Preferably, the amount of the main alloying elements zinc, magnesium, copper should not exceed 12,5-13,0%.
Preferably, the total content of transition elements zirconium, manganese and chromium should not exceed 0,25-0,30%.
Preferably, the ratio of iron to silicon should be less than 1.5 under strong restrictions on the content of the two impurities, especially silicon.
Outf�with the main element - EnterCriticalSection the presence of zirconium in the proposed alloy in small amounts of chromium, manganese in regulation of the total amount of elements not exceeding 0,25-0,30%, promotes the formation and stabilization precrystallization of the grain structure, the origin of the strengthening phases, and therefore additional gain of strength, as well as a positive effect on the resistance to corrosion stress cracking corrosion and dissecting.
The introduction of beryllium reduces the oxidation and improve the fluidity during melting, increasing the quality of ingots and semi-finished products (especially large ones). The presence of very small amounts of hydrogen promotes the formation of fine grain structure, even distribution of the inevitable non-metallic particulate by volume of ingots and semi-finished products and increase their plasticity.
Small additions of titanium and/or boron, having a modifying action, lead to heterogeneous crystallization of the alloy and the grain refinement and, consequently, to improve the plasticity of ingots and semi-finished products and to expand opportunities to increase their size and quality.
Excessive amounts of iron impurities on the impurity content of silicon (more than 1.5 times) when hard their control and regulation to limit the appearance of coarse insoluble Intermet�of Lidov and negative effects on strength and performance properties) is necessary to improve the casting properties of high-alloyed alloys to allow the production of large ingots for long semi-finished products.
Maintaining moderate amounts of copper (up to 1.8%) and magnesium (2.1%) with increasing zinc content (up to 9.3%) and the overall degree of legirovannoi the main components in the alloy provides increased strength characteristics. This limits the possibility of the formation of excess copper-containing intermetallic phases and their negative influence on the characteristics of fracture toughness, ductility, fatigue.
Corrosion resistance to dangerous types of corrosion - corrosion cracking (CU), exfoliating corrosion (RSC), mainly governed by the modes of artificial aging.
Examples of the implementation
In terms of pilot production were cast ingots, chemical compositions are given in table. 1. The ingot had a diameter of 110 mm, obtained by semicontinuous method surface cooled by water. Melting was conducted in an electric furnace. After homogenization at a temperature of 460°C for 24 hours in detail conducted a microanalysis of structure in the cross section of the ingots by means of optical and electron microscopy, microprobe phase analyses ("mezhregionstroyalians"), differential thermal analysis (DTA).
Estimated value of the average grain dcpin the investigated ingots and semi-finished products by the method of quantitative metallography in polarized light on xidirov�tion microsections; quantitative metallography was used widely in the analysis of the volume fraction and shape of intermetallic phases. To study the nature and plasticity of destruction used articles for analysis using an electronic scanning microscope.
The ingot after the homogenization extruded at 390-410°C in the strip section 15×70 mm with the elongation factor >8,0. According to DTA, the temperature of crystallization of eutectics of the investigated alloys was within 473-476°C. Billet of extruded strips tempered with a temperature of 470°C, taking into account fluctuations in the furnace (after prolonged exposure (90 min) in cold water (20-25°C). In svezhenanesennom condition of the workpiece is stretched with an average degree of deformation of ~1.5%. Within 4 h after hardening the strips were subjected to different artificial aging: option T1 by a single-stage (maximum strength) mode 120°C, 24 h, and options on a two-stage regime type T22 (first-cycle at 120°C, 1.5 h + on the second stage at 150°C and a small degree of perestiani - 10-20 MPa).
Complex mechanical and corrosion properties were investigated on samples cut from extruded strips.
Mechanical tensile properties (tensile strength, yield strength, elongation) were determined on round specimens with a diameter d0=5 mm according to GOST 1497.Crack resistance was evaluated by the specific work of fracture (KCT) of impact bending specimen with a fatigue crack in a V-shaped incision, and toughness (KCU) samples with a U-shaped incision according to GOST 9454.
Resistance to low-cycle fatigue (the MCU) was assessed by time to failure round longitudinal specimens with circular cut (Kt=2,2) at high voltage (
Corrosion properties were studied by:
- laminating rust resistance (RSC) is a flat longitudinal samples at a 10-point system in accordance with GOST 9.904;
- resistance to stress corrosion cracking under tension (CU) time to fracture of the transverse specimens with the stress σ=σ of 0.750,2and other conditions according to GOST 9.019;
is the specific conductivity of the eddy current nondestructive method for the OST 1 92133.
In table. 2 presents a set of mechanical (including indicators of fracture toughness and corrosion properties of extruded strips of the claimed and known alloys, excess volume content of intermetallic alloys.
As can be seen from the obtained and presented results, the proposed composition of the alloy is allowed to obtain a high level of strength properties and indicators of fracture toughness (transcrystalline fracture) under high plasticity (relative�th elongation) and acceptable corrosion resistance to dissecting corrosion and stress corrosion cracking.
Thus, the proposed high-strength alloy provides improved weight efficiency while ensuring resource and reliability of the products.
The alloy is used as a structural material for the main elements of the airframe, especially in tight areas (skin and stringers of the top wing, power rack, beams, etc.), missile technology and other products.
Alloy made rolled (sheets, plates), extruded (profiles, panels, etc.) semi-finished products, including lengthy from large ingots with a high level of strength and performance (including increased viscosity of destruction) characteristics.
1. High-strength alloy based on aluminum containing zinc, magnesium, copper, zirconium, manganese, iron, silicon, chromium, at least one element from the group comprising titanium and boron, characterized in that it additionally contains beryllium and hydrogen in the following ratio of components, wt.%:
|at least one element from the group:|
2. Alloy based on aluminum according to claim 1, characterized in that the total content of zinc, magnesium and copper does not exceed 12,5-13,0%.
3. Alloy based on aluminum according to claim 1, characterized in that the total content of zirconium, manganese and chromium does not exceed 0,25-0,30%.
4. Alloy based on aluminum according to claim 1, characterized in that the ratio of iron to silicon is at least 1.5.
5. The product is made of high-strength alloy based on aluminum, characterized in that it is made from an alloy according to claim 1.
SUBSTANCE: alloy contains in wt %: zinc 8-10, magnesium 2.0-3.0, copper 1.6-2.6, scandium 0.12-0.25, zirconium 0.06-0.20, beryllium 0.0001-0.005, cobalt 0.05-0.15, nickel 0.5-1.0, iron 0.45-0.95, aluminium - rest, at that ratio between zinc and magnesium is within range 3.1-4.1.
EFFECT: increased alloy strength at room temperature, and creep resistance at moderately increased temperatures.
3 tbl, 1 ex
SUBSTANCE: alloy contains the following, wt %: zinc - 4.0-6.0, manganese - 0.1-0.3, magnesium - 0.5-2.5, titanium - 0.01-0.1, calcium - 0.005-0.01, aluminium is the rest at the following limitation of content of impurities: iron is not more than 0.1, copper is not more than 0.01, silicone is not more than 0.1, hydrogen is not more than 0.35 cm3/100g of metal.
EFFECT: providing high electrochemical characteristics and excluding a risk of passivation of surface of cast protectors made from the proposed alloy; increasing tensile strength limit of an alloy.
SUBSTANCE: welded aluminium alloy contains, by wt %: zinc 3.8-5.3; magnesium 1.2-2.0; manganese 0.91-1.3; chrome 0.12-0.40; zirconium 0.07-0.15; copper 0.10-0.30; iron ≤ 0.35; silicium ≤ 0.35; vanadium 0.01-0.12; boron 0.01-0.12; nickel ≤ 0.05; calcium ≤ 0.05; aluminium - the rest, at the total contents of zinc and magnesium 5.0-7.3 by wt % and the ratio between the contents of zinc and magnesium - 1.90-4.58.
EFFECT: creation of welded aluminium alloy for the armoured skin, which provides at a high corrosion stability of the armoured skin, increase of safe level increase of resistance to formation of back chips.
SUBSTANCE: invention relates to constructional elements from aluminium alloy, in particular, for space industry. The slab is made with the thickness at least 4 inches from aluminium alloy, which contains (wt %): Zn - from 6.4 up to 8.5, Mg - from 1.4 up to 1.9, Cu - from 1.4 up to 1.85, Zr - from 0.05 up to 0.15, Ti - from 0.01 up to 0.06, Fe - up to 0.15, Si - up to 0.12, the rest is aluminium, accompanying elements and impurities.
EFFECT: improved combination of durability and resistance to fracturing is provided, and also the resistance to a fracturing as a result of stress corrosion is provided, especially in conditions of marine atmosphere.
10 cl, 14 dwg, 14 tbl, 3 ex
SUBSTANCE: method to produce axisymmetric forgings of a cover type with a diameter of up to 200 mm from high-strength aluminium alloys Al-Zn-Mg-Cu, alloyed with scandium and zirconium, includes preparation of aluminium melt, containing scandium and zirconium, its reheating to 765-780°C, casting of round bars of small diameter at 710-740°C, their homogenisation at 400-440°C for 4-10 hours, stamping at 380-440°C, tempering from temperature 465-480°C with even cooling of the entire surface of forgings with speed providing for preservation of fully non-crystallised structure of the forging after tempering, and artificial ageing.
EFFECT: forgings have lower level of residual tempering stresses, which provides for stability of geometric parameters of parts due to elimination of ovalisation when turning forgings into thin-walled parts.
2 tbl, 1 ex
SUBSTANCE: proposed composition contains the following substances, in wt %: zinc - 6.0-8.0; magnesium - 3.4-4.2; copper - 0.8-1.3; scandium - 0.07-0.15; zirconium - 0.08-0.12; beryllium - 0.0005-0.004; cerium - 0.01-0.15; titanium - 0.02-0.08; silicon - 0.01-0.15; iron - 0.01-0.15; hydrogen - 0.05-0.35 cm3/100 g of metal; unavoidable impurities from the group including Mn, Cr, V, Mo, Li, Ag, K, Na, O in total amount of not over 0.10, aluminium making the rest at the ratio of magnesium-to-zinc content making 0.53-0.57.
EFFECT: higher strength of Al-Zn-Mg-Cu-system alloys and articles.
2 cl, 1 ex, 2 tbl
SUBSTANCE: invention refers to active material of negative electrode for electric device containing an alloy with composition formula SixZnyAlz, where each of x, y and z is mass percentage meeting the following: (1) x+y+z=100, (2) 26≤x≤47, (3) 18≤y≤44 and (4) 22≤z≤46. Also invention refers to electrical device and negative electrode for it.
EFFECT: providing active material of negative electrode for electrical device such as lithium-ion accumulator battery providing well-balanced properties of high cycling conservation and high initial capacity.
4 cl, 2 tbl, 10 dwg, 2 ex
SUBSTANCE: 50-305 mm-thick article is made from alloy of the following chemical composition, in wt %: Zn - 3-11, Mg - 1-3, Cu - 0.9-3, Ge - 0.03-0.4, Si - not over 0.5, Fe - not over 0.5, Ti - not over 0.3, aluminium and common or unavoidable elements and impurities making the rest. Proposed method comprises slab casting, heating and/or annealing treatment of cast slab, slab hot treatment, optional cold treatment, heat processing to solid solution of slab (PSS), cooling of PSS slab, optional expansion or compression of cooled PSS slab or any other cold treatment of PSS slab to remove strain, ageing of cooled PSS slab to reach required state.
EFFECT: high hardness, ductility and lower sensitive to quenching.
20 cl, 2 tbl, 1 ex
SUBSTANCE: aluminium-based alloy is used for production of strained semis as forgings and tubes for gas centrifuges, low-pressure compressors, vacuum molecular pumps and heavy-duty units operated at mildly increased temperatures. Proposed composition contains the following substances, in wt %: zinc - 6.6-7.4, magnesium - 3.2-4.0, copper - 0.8-1.4, scandium - 0.12-0.30, zirconium - 0.06-0.20, beryllium - 0.0001-0.005, cobalt - 0.05-0.15, nickel - 0.35-0.65, iron - 0.25-0.65, aluminium making - the rest.
EFFECT: higher strength at sufficient ductility and reduce density of alloy.
1 ex, 3 tbl
SUBSTANCE: proposed method comprises casting the ingots of alloy containing the following components in wt %: zinc - 6.-4.1, magnesium - 0.6-1.1, manganese - 0.2-0.5, zirconium - 0.05-0.12, chromium - 0.05-0.15, copper - 0.1 -0.2, titanium - 0.01 -0.06, molybdenum - 0.01 -0.06, aluminium making the rest, at the temperature of 690-710°C and casting rate of 25-50 mm/min. Ingots are homogenised at 450-470°C for 8-12 hours and subjected to hot forming at 10-530°C and outflow rate of 0.1-4.0 m/min. Besides it includes air or air-water mix quenching and two-step ageing: at 90-110°C for 6-12 hours and at 160-190°C for 4-10 hours.
EFFECT: production of log parts with high operating properties.
4 cl, 1 ex, 6 tbl, 4 dwg
SUBSTANCE: aluminum based protective alloy comprises, in mass %, 4-5 of zinc, 0.01-0.06 of indium, 0.01-0.1 solder, 0.01-0.1 of zirconium, and aluminum the remainder.
EFFECT: enhanced corrosion protection.
SUBSTANCE: invention relates to aluminum-base alloys used for making deformed semifinished products used in industry and building. Proposed alloy comprises the following components, wt.-%: zinc, 4.5-5.6; magnesium, 1.6-2.1; manganese, 0.2-0.8; scandium, 0.03-0.09; zirconium, 0.05-0.12; copper, 0.1-0.3; titanium, 0.01-0.07; molybdenum, 0.01-0.07; cerium, 0.001-0.01, and aluminum, the balance, wherein the ratio content of zinc to magnesium = 2.6-2.9. Invention provides the development of alloy providing enhancing corrosion resistance of articles.
EFFECT: improved and valuable properties of alloy.
2 tbl, 1 ex
FIELD: metallurgy of aluminum alloys; manufacture of wrought semi-finished products for transport engineering and other industries.
SUBSTANCE: proposed alloy includes the following components, mass-%: zinc, 3.6-4.1; magnesium, 0.6-1.1; manganese, 0.2-0.5; zirconium, 0.05-0.12; chromium, 0.05-0.15; copper, 0.1-0.2; titanium, 0.01-0.06; molybdenum, 0.01-0.06; the remainder being aluminum.
EFFECT: enhanced corrosion resistance and technological ductility of semi-finished items at plastic metal working.
2 tbl, 1 ex
SUBSTANCE: invention relates to aluminum-base material. Proposed material comprises the following components, wt.-%: zinc, 6-8; magnesium, 2.5-3.5; nickel, 0.6-1.4; iron, 0.4-1.0; silicon, 0.02-0.2; zirconium, 0.1-0.3; scandium, 0.05-0.2, and aluminum, the balance wherein the temperature of equilibrium solidus of material is 540°C, not less, the hardness value of material is 200 HV, not less. Invention provides the development of the novel high-strength material designated for both producing fashioned ingots and deformed semifinished product possessing high mechanical properties. Invention can be used in making articles working under effect of high loading, such as car articles and sport inventory articles.
EFFECT: improved and valuable properties of material.
4 cl, 2 dwg, 4 tbl, 3 ex
FIELD: nonferrous metallurgy.
SUBSTANCE: invention relates to ultrastrong economically alloyed aluminum-based alloys belonging to system Al-Zn-Mg-Cu. Alloy and article made therefrom are, in particular, composed of, %: zinc 3.5-4.85, copper 0.3-1.0, magnesium 1.2-2.2, manganese 0.15-0.6, chromium 0.01-0.3, iron 0.01-0.15, silicon 0.01-0.12, scandium 0.05-0.4, at least one element from group: zirconium 0.05-0.15, cerium 0.005-0.25, and aluminum - the rest.
EFFECT: increased characteristics of corrosion resistance, bondability with all welding techniques, and lowered fatigue crack growth rate.
2 cl, 2 tbl
SUBSTANCE: invention proposes alloy containing the following components, wt.-%: zinc, 5.4-6.2; magnesium, 2.51-3.0; manganese, 0.1-0.3; chrome, 0.12-0.25; titanium, 0.03-0.10; zirconium, 0.07-0.12; beryllium, 0.0002-0.005; sodium, 0.0001-0.0008; copper, 0.2, not above; iron, 0.3, not above; silicon, 0.2, not above, and aluminum, the balance. Alloy provides enhancing uniformity of armor structure and its welded seams, stable armor resistance of extended armor welded seams independently on disposition of units to bed welded, elimination of splits from armor rear site in case its resistance to a missile impact, elimination possibility for reducing tenacity of armor during its exploitation including using under conditions of combination with dynamic protection of armored-body and armor-carrying mechanized objects. Invention can be used in producing armor for individual protection and for protection of mechanized armor-carrying objects against effecting agents.
EFFECT: improved and valuable properties of alloy.
SUBSTANCE: invention proposes alloy comprising the following components, wt.-%: zinc, 4.7-5.3; magnesium, 2.1-2.6; chrome, 0.12-0.25; titanium, 0.03-0.10; zirconium, 0.07-0.12; beryllium, 0.0002-0.005; iron, 0.05-0.35; silicon, 0.05-0.25; boron, 0.0003-0.003; sodium, 0.0001-0.0008; copper, 0.2, not above, and aluminum, the balance. Proposed alloy provides enhancing the armor structure uniformity and its welded joints, to provide stable armor resistance of extended welded joints of armor and independently of location of units to be welded, to exclude splitting off from rear side of armor in case armor not piercing by a missile, to exclude possibility for decreasing tenacity of armor in exploitation including using under conditions of combination with external dynamic protection of armored-carcass and armored-carrying mechanized objects. Invention can be used in producing armor for armored-carrying equipment for protection against effect of affection agents.
EFFECT: improved and valuable technical properties of alloy.
SUBSTANCE: invention proposes alloy comprising the following components, wt.-%: zinc, 4.7-5.3; magnesium, 2.1-2.6; manganese, 0.05-0.15; chrome, 0.12-0.25; titanium, 0.03-0.10; zirconium, 0.07-0.12; beryllium, 0.0002-0.005; iron, 0.05-0.35; silicon, 0.05-0.25; sodium, 0.0001-0.0008; copper, 0.2, not above, and aluminum, the balance. Proposed alloy provides enhancing armor structure uniformity and its welded joins, to provides stable armor resistance of armor welded joints being independently on location of units to be welded, to exclude splitting off from rear side of armor in case armor not piercing by missile, to provide high tenacity of armor including its using under conditions of combination with external dynamic protection of armored-carcass and armor-carrying mechanized objects. Invention can be used in producing armor for armor-carrying equipment for its protection against protection of affecting agents.
EFFECT: improved and valuable properties of alloy.
SUBSTANCE: the present innovation deals with obtaining aluminum-based alloys necessary for manufacturing stampings, particularly those of automobile wheels disks. The alloy in question has got the following composition, weight%: copper 0.8-2.2; magnesium 1.2-2.6; manganese 0.2-0.6; iron ≤0.25; silicon ≤0.20; zinc 5.0-6.8; titanium ≤0.1; chromium 0.08-0.17; zirconium 0.01÷0.12; boron 0.0008-0.005; antimony 2.5-3.5; indium 2.5-3.5; boron 0.4-0.5; hydrogen (0.3-4.1)10-5, aluminum - the rest. The alloy in question is of optimal combination of strength and plasticity that guarantee the required level of performance characteristics of automobile wheels disks, the decrease of their weight in combination with high technological effectiveness at volumetric stamping, especially complex-shaped articles.
EFFECT: higher strength and plasticity of the alloy.
2 cl, 1 ex, 3 tbl
FIELD: metallurgy, alloys.
SUBSTANCE: invention relates to compositions of deformable aluminum-base alloys. Proposed alloy comprises the following components, wt.-%: zinc, 5.0-7.0; magnesium, 0.4-0.8; copper, 0.8-1.2; manganese, 0.8-1.2; zirconium, 0.2-0.3; titanium, 0.2-0.3; niobium, 0.2-0.3; nickel, 3.0-5.0; boron, 0.02-0.03, and aluminum, the balance. Proposed alloy possesses the enhanced strength. Proposed alloys can be used in aircraft construction and automobile construction.
EFFECT: improved and valuable property of alloy.