High-strength deformable alloy based on aluminium with lower density and method of its processing

FIELD: metallurgy.

SUBSTANCE: aluminium-based alloy with lower density is designed for making deformed semi-finished products, including sheets used in aircraft building. The alloy contains the following components, wt %: magnesium 4.2-5.0; zinc 3,2-3.9; copper 0.4-1.0; scandium 0.17-0.30; zirconium 0.07-0.14; titanium 0.01-0.05; berillium 0.0001-0.005; hydrogen 0.05-0.35 cm3/100 g of metal; manganese < 0.25; chrome <0.10; iron <0.30; silicon <0.20; aluminium - balance, with the ratio of magnesium content and zinc content - 1.3. The method for processing of alloy includes homogenisation is carried out at 400-430°C for 6-15 hours, hot deformation - at temperature of 380-430°C, and cold deformation to the final size - at the total extent of hot and cold deformation of less than 80%.

EFFECT: alloy has higher strength in combination with lower density.

2 cl, 5 tbl

 

The present invention relates to the field of metallurgy of aluminum alloys, in particular deformable thermally hardened high-strength alloys of the system Al-Zn-Mg, intended for the manufacture of the deformed semi-finished products, including sheets, used in aircraft construction.

The purpose of the invention is to create a base alloy system Al-Zn-Mg with a high level of durability and performance with reduced density. Known thermally hardened alloys of the system Al-Zn-Mg has the lowest density alloy B92 (Collection "Aluminum alloys", issue 3, publishing house "engineering", 1964, p.76) the following chemical composition (wt.%):

Magnesium3,9-4,6
Zinc2,9-3,6
Manganese0,6-1,0
Beryllium0,0001-0,005
Iron≤0,3
Silicon≤0,2
Copper≤0,05
AluminumRest

Alloy B92 has a low density of 2.72 is/cm 3but on the strength of it is noticeably inferior to known high-strength alloys: sheets of this alloy after hardening heat treatment (quenching and artificial aging) have σin=430-480 MPa, σ02=290-350 MPa.

Known for high strength thermally hardened alloys based on aluminum containing zinc, magnesium, copper, iron, silicon, scandium, zirconium, titanium, Nickel and/or cobalt, boron and/or carbon, at least one element from the group of hafnium, molybdenum, cerium, manganese, chromium, yttrium, vanadium, niobium, adopted for the prototype (RU # 23394113 C1, C22C 21/08, 10.07.2010, 5 pages) [1] and having the following composition:

Zinc2,5-4,0
Magnesium4,1-6,5
Copper0,2-1,0
Ironto 0.25
Siliconto 0.15
Scandiumof 0.005 to 0.3
Zirconia0,005-0,25
Nickel and/or cobalt0.1
Boron and/or carbon0.05
At least one element from the group:
Hafniumto 0.15
Molybdenumto 0.15
Ceriumto 0.15
Manganese0.5
Chrometo 0.28
Yttriumto 0.15
Vanadiumto 0.15
Niobiumto 0.15
Aluminum and inevitable impuritiesRest

Moreover, the content of Mg content is greater than or equal to 1.1.

These alloy as inevitable impurities contains calcium, bismuth, sodium, potassium, hydrogen, beryllium, lead, tin, and lithium in an amount of not more than 0.01 wt.% each and not more than 0.1 wt.% in the sum.

The alloy has a sufficiently high mechanical strength and good performance of static and cyclic crack resistance. However, the alloy malotehnologichen in the metallurgical industry, in particular for casting ingots, and has a high propensity to cracking during welding./p>

The technical task of the present invention is the creation of the base alloy system Al-Zn-Mg with a high level of strength and fracture toughness characteristics needed to power elements of the airframe, combined with the lower density. When this alloy should possess good processability in the metallurgical industry, in particular for casting ingots, and machine-building production and operation of argon-arc welding.

To solve this problem is proposed based alloy of aluminum containing magnesium, zinc, copper, which is additionally introduced beryllium and hydrogen in the following ratio (wt.%):

Magnesium4,2-5,0
Zincthe 3.2 to 3.9
Copper0,4-1,0
Scandium0,17-0,30
Zirconia0,07-0,14
Titanium0,01-0,05
Beryllium0,0001-0,005
Manganese≤0,25
Chrome≤0,10
Iron≤0,30
Silicon≤0,20
AluminumThe rest,

when the content of magnesium in the zinc content of equal to 1.3, and the content of hydrogen in the amount of 0,05-0,35 cm3/100 g of metal.

Adopted in the proposed alloy, the ratio of magnesium and zinc and low in copper provides a reduced density - 2,71 g/cm3.

The ingot continuous casting of the proposed alloy is homogenized at low temperature 400-430°C for 6-15 hours, hot deformation is carried out at a temperature 380-430°C, and the total degree of deformation during hot and cold thermo-mechanical processing should exceed 80%.

The proposed alloy differs from the well-known [1] that additionally contains beryllium and hydrogen in the following ratio, wt.%:

Magnesium4,2-5,0
Zincthe 3.2 to 3.9
Copper0,4-1,0
Scandium0,17-0,30
Zirconia 0,07-0,14
Titanium0,01-0,05
Beryllium0,0001-0,005
Manganese≤0,25
Chrome≤0,10
Iron≤0,30
Silicon≤0,20
AluminumThe rest,

when the content of magnesium in the zinc content of equal to 1.3, and the content of hydrogen in the amount of 0,05-0,35 cm3100 g of alloy.

The proposed method of processing an alloy different from the well-known [1] that the homogenization is carried out at a temperature of 400-430°C for 6-15 hours, hot deformation is carried out at a temperature 380-430°C when the total degree of hot and cold deformation of not less than 80%.

Deformed semi-finished products from the proposed alloy is subjected to a hardening heat treatment: tempering with 450-460°C in cold water and subsequent aging in a stepwise modes, such as one of two featured modes:

1. 100°C, 10-24 h + 150°C, 7-20 h (aging at maximum strength, the T1 mode).

2. 100°C, 10-24 h + 190°C, 5-20 h (small perestiani, in which there is some reduction is their strength, but is improved corrosion resistance, T2).

The main hardening of the proposed alloy is determined by the content of magnesium and zinc, forming after quenching and aging the particles of the hardening phases η' and η (MgZn2), T(Al2Mg3Zn3(in various combinations depending on the temperature and duration of aging). However, these concentrations of magnesium and zinc in the proposed alloy do not provide the necessary strength. For additional hardening in the alloy additives introduced transition metals scandium, zirconium, titanium. The mechanism of hardening of the alloy of these additives is as follows. During crystallization in the process of continuous casting of ingots mentioned additives is almost completely covered in supersaturated solid solution, which when homogenizing the ingot at a temperature of 400-430°C decays emitting a very dispersed nanoparticles phase Al3(Sc, Zr), which dissolved a small amount of titanium. Zirconium and titanium, are included in the nanoparticles of Al3Sc and replacing the atoms of scandium, stabilize the particles and prevent their rapid coagulation with subsequent technological heatings.

These nanoparticles (size 5 to 15 nm) are inherited deformed semi-finished products obtained from ingot to cause significant additional hardening, first, directly the public (the effect of precipitation hardening), secondly, due to the fact that nanoparticles phase Al3(Sc, Zr) increase the temperature of recrystallization of the deformed semi-finished products the above heating temperature for quenching, and in processed foods, including leaves, remains precrystallization, polygoncount structure with fine subgrain structure precrystallization grains, providing considerable structural (subgrain) hardening. Saving in the leaves of the proposed alloy after quenching precrystallization patterns is a fundamental difference from other sheets of high-strength aluminum alloys.

The presence within the specified limits of hydrogen included at temperatures forming a solid solution implementation, provides increased process flexibility and the ability to achieve high total deformation under pressure treatment.

Microdamage beryllium change the structure of the protective aluminum oxide destroyed, making it more dense, preventing the melt from a strong supersaturation of hydrogen, from oxidation. Increased casting properties of the alloy and superior weldability largely due to the presence of microadditives of beryllium.

Total value of hardening of the alloy directly from nanoparticles and structural hardening is 100-150 MPa and depends on the parameters of the term the mechanical processing, which is subjected to the alloy in the manufacturing process of the deformed semi-finished products. Main parameters of thermomechanical processing of determining the structure and properties of semi-finished products from the proposed alloy, are temperature and holding at homogenizing the ingot, the temperature of the hot deformation, the total degree of hot and cold deformation. The mode of homogenization of the ingot and the temperature of the hot deformation determine the dispersion of nanomedicine phase Al3(Sc, Zr), and the total degree of hot and cold deformation determines the size of the subgrains formed in the process of polygonization at the heating temperature for quenching.

As studies have shown, the optimal regime thermomechanical processing of the proposed alloy is the following:

1. Low-temperature homogenization of the ingot at a temperature of 400-430°C, 6-15 h ensures particle phase Al3(Sc, Zr) with a size of 5-15 nm.

2. Hot pressure treatment (rolling, extrusion, forging) at a temperature of 380-430°C ensures the preservation of nano-discharge phase of Al3(Sc, Zr) and the formation of stable Polynesians structure.

3. The total degree of hot and cold deformation of not less than 80% ensures formation during subsequent heating for hardening dispersion of the subgrain structure with the value subzero is 1-3 μm.

Examples of implementation

From the proposed average composition of the alloy by the method of semi-continuous casting cast slabs section 165×550 mm, the composition of which is given in table 1.

Table 1.
The actual composition of the proposed alloy, wt.%
AlloyAlloying components and impurities
ZnMgCuScZrTiBeMnFeSi
Offer3,64,60,70,190,080,030,00050,110,060,05

The alloy showed good adaptability in continuous casting of ingots. The ingots had a smooth surface without Nikitin and not flows.

The content of odor is Yes in the ingot, defined by the vacuum extraction method, was 0.18 cm3/100 g of metal.

Ingots of compliance with the above mentioned parameters of thermomechanical treatments were made sheets of thickness 9 mm (hot rolled), 3.0 and 1.6 mm (hot rolling to 9 mm, then cold).

Table 2 shows the mechanical properties of sheets of different thickness, subjected to a hardening heat treatment. Precrystallization, polygoncount sheets of all thicknesses have high strength characteristics and low anisotropy properties. With the increase in the total degree of deformation strength properties of the sheets grow. This is due to the fact that the total degree of deformation in the manufacture of leaves affects the subgrain structure is more than the total degree of deformation, the smaller subzero and accordingly the greater strength.

Deformed semi-finished products with precrystallization structure, in particular sheets, made of the proposed alloy compliance with the declared parameters of thermomechanical processing can be used, for example, in two conditions: 1) after the final heat treatment for maximum strength (T1) and 2) after softening aging (T2), providing high corrosion resistance under slightly reduced strength.

In table 3 and 4 shows the mechanical resursnye properties of thin sheets with a thickness of 1.6 mm from the proposed alloy in a state of T1 and T2. The leaves have a good combination of strength, plastic, resource and corrosion properties. The density of the alloy is 2,71 g/cm3.

Table 5 shows the properties sheet of the proposed alloy, and are obtained consistent with the declared parameters of thermomechanical processing in state T1 in comparison with the properties of the sheets of the alloy of the prototype.

Comparison of properties of thin sheets offer alloy known [1] shows that the proposed alloy is stronger (σinand σ02), has higher values of fracture toughness Kwithyand properties of welded joints of the proposed alloy is much higher. In addition, laboratory studies have shown that the proposed alloy has a high fluidity, which provides better casting properties and less prone to cracking during welding.

Table 3.
The mechanical properties of sheets with thickness of 1.6 mm from the proposed alloy, heat-treated at state T1 and T2
T1 - 100°C, 10 h+150°C, 8 h
T2 - 100°C, 10 h+190°C, 5 h
StateLongitudinal directionTransverse directionDGC score
σin, MPaσ02, MPaδ, %σin, MPaσ02, MPaδ, %
T160252611,858251811,83-4
T255545211,954344812,12-3

Table 4.
Characteristics of the fracture toughness of the leaves of the proposed alloy, heat-treated at state T1 and T2
T1-100°C,10 h + 150°C, 8 h
T2-100°C, 10 h + 190°C, 5 h
StateLongitudinal directionTransverse direction
Towithy, MPa√mσTrnet, MPaSRTU, mm/clcl, δk means=30 MPa√mTowithy, MPa√mσTrnet, MPaSRTU, mm/clcl, δk means=30 MPa√m
T185,34152,089,84362,2
T276,93742,679,73882,6

1. High-strength heat-hardening alloys based on aluminum containing magnesium, zinc, copper, scandium, zirconium, characterized in that it additionally contains hydrogen and beryllium in the following ratio, wt.%:

AluminumBase
Magnesium4,2-5,0
Zincthe 3.2 to 3.9
Copper0,4-1,0
Scandium0,17-0,30
Zirconia0,07-0,14
Titanium0,01-0,05
Beryllium0,0001-0,005
Hydrogen0,05-0,35 cm3/100 g metal
Manganese≤0,25
Chrome≤0,10
Iron≤0,30
Silicon≤0,20,

the ratio of the content of the main alloying elements magnesium and zinc should be equal to 1.3.

2. The method of processing high-strength thermally hardening the deformable alloy based on aluminum according to claim 1, including homogenization at a temperature of 400-430°C for 6-15 h, hot deformation at a temperature of 380-430°C and cold deformation on the target size, and the total degree of hot and cold deformation must not be less than 80%.



 

Same patents:

FIELD: metallurgy.

SUBSTANCE: method involves casting of an ingot and obtaining of workpiece from it using equal-channel annular pressing with back pressure. Reduction of duration of shape-generating operations performed in the mode of high-speed superplasticity, as well as reduction of the workpiece heating time is provided due to the fact that prior to the ingot casting, the molten metal is heated up to 760-800°C and exposed at that temperature during 0.5-1.0 h; ingot is cast by means of semi-continuous casting to sliding crystalliser; cast ingot is annealed at temperature of 360-380°C during 3-8 h; workpiece of rectangular section, which is square in plan view, is obtained from ingot with ratio of thickness to width of 0.17 to 0.33; deformation of workpiece obtained from the ingot by pressing is performed at crossing angle channels of 90° at temperature of 305-325°C with number of passes of 4 to 8, which corresponds to true deformation of ~4 to ~8, with back pressure value equal to 30-40% of the value of applied pressure, with rotation of workpiece after each pass through 90° relative to the axis perpendicular to large edge of workpiece and passing through the centre of workpiece; then, workpiece is subject to rolling at temperature of previous pressing with total swaging of 80-95% at temperature of working rolls of rolling mill, which is equal to rolling temperature.

EFFECT: optimisation of superplastic shaping process of products of irregular shape.

1 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: plate of 10 mm thickness or larger from aluminium alloy features higher durability. Note here that said aluminium alloy has the following chemical composition with the following components, in wt %: Mg 4.0-6.0, Mn 0.2-1.4, Zn not over 0.9, Zr < 0.3, Cr < 0.3, Sc < 0.5, Ti < 0.3, Fe < 0.5, Si < 0.45, Ag < 0.4, Cu < 0.25, other elements and unavoidable impurities of each aforesaid element - <0.05, sum - <0.20, aluminium making the rest. Plate features elongation in L direction exceeding 10% and tensile strength making, t least, 330 MPa. Proposed plate is produced by casting, preheating and/or homogenising, hot rolling, first cold forming, annealing at less than 350°C, and second cold forming.

EFFECT: higher resistance to kinetic projectiles, better formability.

27 cl, 3 dwg, 2 tbl, 2 ex

FIELD: metallurgy.

SUBSTANCE: melt is overheated to a temperature of 760-800 °C with an exposure of 0.5-1.0 h, a billet is cast by continuous casting into the slide mould, the billet is annealed at a temperature of 360-380 °C for 3-8 h, production of a rectangular billet out of a square bar in the ratio of thickness to width ratio from 0.17 to 0.33. This is followed by deformation resulting from a bar of the billet using equal-channel angular pressing at an angle of channels intersection of 90 °C at a temperature of 305-325 °C with the number of passes of 8 to 10, which corresponds to a true deformation of 8 to 10, with back pressure equal to 40-50% of the applied pressure, and rotating the billet after each pass per 90 ° about the axis perpendicular to a bigger face of the billet, and passing through the centre of the billet. After the deformation of the billet using an equal channel angular pressing, cold rolling is carried out with a total compression of 75-80%, or cold rolling with a combined compression 80-95% followed by annealing at a temperature of 305-335 °C for 0.5-1.0 h with cooling to room temperature with a rate of 15-35 °C/h.

EFFECT: deformed billets with high mechanical strength while maintaining flexibility.

1 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: there is received constructional material from alloy on the basis of aluminium, containing components at following ratios, wt %: magnesium 10.50-15.50, manganese 0.05-0.10, zirconium 0.01-0.15, titanium 0.09-0.15, silicon and iron not more than 0.08, aluminium is the rest. Crystallisation of melt is implemented in rotary crystalliser at gravitation coefficient, equal to 180-250, during time of melt existence, equal to 12-15 s/kg, and cooling rate not higher than 5°C/s. Ingot is thermal treated and rolled. At first it is heated during 2-4 hours at temperature 340-380°C, then at that temperature is implemented its hot rolling up to thickness 4-8 mm at a degree of deformation in each cycle up to 30% and final temperature of semi-finished rolled products in the range 310-330°C. Then it is implemented cold rolling of semi-finished rolled products at a degree of deformation in each cycle up to 50% with intermediate softening during 0.5-2.0 hours at tempearture 310-390°C up to required thickness 0.5-2.0 mm and it is implemented finish annealing of rolling during 5-40 minutes at temperature 400-450°C.

EFFECT: increased durability, plasticity and manufacturability of rolling.

2 dwg, 2 cl

FIELD: metallurgy industry.

SUBSTANCE: invention refers to metallurgy, and namely to methods of producing superductile plates from aluminium alloys of aluminium-magnesium-lithium system, and can be used for superductile moulding of complex-shaped parts, as well as structural material when producing extruded sections. From an ingot there made is a half-finished article in the form of a cylinder. Hardening is carried out at 460±10°C during 0.5 hour. After that the half-finished article is extruded in intersecting channels with diameter corresponding to diameter of half-finished article deformed with a shear at the temperature of 300-400°C with accumulated deformation degree e=10. Rolling is carried out at the temperature of 330-370°C.

EFFECT: producing plates with high homogeneity of mechanical properties and improved superductility indices at low temperatures and high metal flow rates.

1 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: said utility invention relates to Al-Zn-Mg alloys, namely, to alloys for welded structures, such as structures used in marine construction, during manufacture of car and industrial vehicle bodies, and stationary or movable tanks. The method involves manufacture of a plate using semi-continuous casting. The plate is made of an alloy containing, % weight: Mg 0.5-2.0, Mn < 1.0, Zn 3.0-9.0, Si < 0.50, Fe < 0.50, Cu < 0.50, Ti < 0.15, Zr < 0.20, Cr < 0.50, aluminium with its inevitable impurities being the remaining, Zn/Mg > 1.7. After that, the plate is subjected to homogenisation and/or reheating at a temperature T1 selected so that 500°C ≤T1≤(Ts-20°C) where Ts is the alloy burning temperature. The first hot rolling stage includes one or several rolling passes on a hot-rolling mill, the input temperature T2 is selected so that (T1-60°C)≤T2≤ (T1-5°C), and the rolling process is performed in such a way that the output final temperature T3 would be so that (T1-150°C)≤T3≤(T1-30°C) and T3 < T2. The strip produced at the said first hot rolling stage is rapidly cooled to the temperature T4. The second stage of hot rolling of the said strip is performed at the input temperature T5 selected so that T5≤T4 and 200°C≤T5≤300°C. The rolling process is performed in such a way that the coiling temperature T6 would be so that (T5-150°C)≤T6≤(T5-20°C).

EFFECT: enhancement of balance between mechanical properties and corrosion resistance of base metal and welded joint using simplest and most reliable method.

34 cl, 8 dwg, 20 tbl, 10 ex

FIELD: foundry and rolling processes.

SUBSTANCE: structural material contains following components, wt %: magnesium 9.0-11.0, zirconium 0.15-0.2, cobalt 0.01-0.001, beryllium 0.001-0.02, boron 0.005-0.007, aluminum - the balance. Crystallization of melt is carried out in rotary crystallizer at gravitation coefficient 220-250 and melt lifetime 12-15 sec/kg. Ingot is first heated for 2-4 h at 340-380° C and then subjected to hot rolling at that temperature until thickness 4-8 mm is attained at deformation rate up to 30% in each cycle and final rolling temperature 310-330° C. Thereafter, cold rolling is effected with deformation rate up to 50% in each cycle and intermediate annealings for 0.5-2.0 h at 310-390° C until required thickness 0.5-2.0 mm is attained followed by final annealing of rolled metal for 5-40 min at 400-450° C.

EFFECT: increased strength, plasticity, and processability of aluminum-based alloy with 9-11% magnesium.

2 cl, 2 dwg, 1 tbl

FIELD: nonferrous metallurgy.

SUBSTANCE: invention is intended for use in metallurgy, mechanical engineering, and aircraft industry, in particular for manufacturing honeycomb structures. Alloy is composed of, wt %: magnesium 8-10, manganese 0.1-0.15, zirconium 0.15-0.2, cobalt 0.05-0.2, boron 0.005-0.007, beryllium 0.001-0.02, iron 0.15-0.2, silicon 0.15-0.2, titanium 0.1-0.2, aluminum - the balance. Ingot for manufacturing structural foil is obtained by semicontinuous casting in rotary crystallizer at volumetric cooling 4-20°C/sec. Structural foil manufacturing process comprises homogenization, hot rolling, annealing, cold rolling followed by annealing in air atmosphere, second cold rolling followed by annealing, and final cold rolling.

EFFECT: increased strength of alloy at ambient and elevated temperatures and improved processability un rolling stage.

3 cl, 3 tbl

FIELD: metallurgy of aluminum base alloys such as Al-Mg-Li-Cu system alloys used as constructional materials in aircraft making and spatial technology, transport machine engineering for making facing and inner reinforcing structures.

SUBSTANCE: alloy contains next ingredients, mass %: lithium, 1.5 - 1.9; magnesium, 1.2 - 3.5; copper, 1.4 - 1.8; zinc, 0.01 -1.2; manganese, 0,01 - 0.8; titanium, 0.01 -0.25; silicon, 0.005- 0.8; cerium, 0.005 -0.4; at least one element selected from group including scandium, 0.01 - 0.3; zirconium, 0.003 - 0,15; beryllium, 0.001 - 0.2; aluminum, the balance. Method for heat treatment of alloy comprises steps of quenching, straightening and artificial aging according to three-step mode. Quenching is performed from temperature 510 - 535°C. First step of artificial aging is realized at temperature 95 - 120°C. In concrete variants of invention second step of aging is realized at temperature 130 -180°C for 3 - 25 hours. Third step of artificial aging is realized at temperature 95 - 120°C for time period 15 h and more. Invention provides enhanced strength and thermal stability of alloy after heating at 85°C for 100 h while keeping high viscosity of rupture and technological plasticity of alloy at making thin sheets by coil rolling.

EFFECT: improved strength and thermal stability of alloy.

3 cl, 4 tbl, 1 ex

FIELD: metallurgy; methods of the thermal treatment of sheets and welded joints of the aluminum-magnesium-silicon alloys system.

SUBSTANCE: the invention is pertaining to metallurgy, in particular, to the methods of the thermal treatment of sheets and welded joints of the aluminum-magnesium-silicon alloys system. The method provides for heat hardening at the temperatures from 525-530°C with refrigeration in water and tempering. The tempering is conducted at the temperatures of 180-200°C with the time of aging for 1.0-3.5 hour. The technical result of the invention is reduction of duration of the heat treatment of the sheets and the details produced out of them by the cold stamping and also their welded joints.

EFFECT: the invention ensures reduction of duration of the heat treatment of the sheets and the details produced out of them by the cold stamping and also their welded joints.

2 tbl

FIELD: metallurgy.

SUBSTANCE: aluminium-based alloy contains the following components, wt %: lithium 1.7-1.9, magnesium 4.0-4.4, scandium 0.14-0.16, zirconium 0.09-1.1, at the ratio of scandium/zirconium = 1.4-1.6, aluminium - balance.

EFFECT: achievement of low density in combination with high strength and plasticity, which makes it possible to achieve high extent of elongation at higher temperatures and to manufacture parts of complicated shape in a mode of superplastic shaping.

1 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: magnesium in quantity of not more than 3% is added to aluminium molten in melting pot with addition of beryllium alloy combination; at the same time, molten aluminium is prepared with 10-16 % of lead of aluminium weight. After that, molten aluminium with lead is poured into molten aluminium with manganese, mixed, and poured on granules by molten metal efflux through a hole made at melting pot bottom.

EFFECT: obtaining an alloy having high degree of lead recovery and more uniform distribution of lead inclusions in aluminium.

1 tbl, 3 ex

FIELD: metallurgy.

SUBSTANCE: aluminium-based cast alloy has the following chemical composition, in wt %: Cu 3.5-6.0, Mg 0.2-0.9, Ti 0.1-0.4, Zr 0.1-0.5, Mn 0.2-1.2, Zn 0.5-2.5, Sc 0.15-0.5, Al making the rest.

EFFECT: reduced metal consumption, higher reliability in operation.

2 tbl

FIELD: metallurgy.

SUBSTANCE: alloy on base of aluminium used for welded structures and item of it contains following components, wt %: magnesium 5.1-6.5, manganese 0.4-1.2, zinc 0.45-1.5, zirconium to 0.2, chromium to 0.3, titanium to 0.2, iron to 0.5, silicon to 0.4, copper 0.002-0.25, calcium to 0.01, beryllium to 0.01, at least one element of group: boron, carbon each to 0.06, at least element of group: bismuth, lead, tin each to 0.1, scandium, silver, lithium each to 0.5, vanadium, cerium, yttrium each to 0.25, at least one element of group: nickel and cobalt each to 0.25, aluminium and unavoidable impurities at summary contents of magnesium and zinc 5.7-7.3 wt % and summary contents of iron, cobalt and/or nickel - not more, than 0.7 wt %.

EFFECT: alloy and items of it possessing anti-pulp resistance, upgraded mechanical properties in annealed condition including cryogenic temperatures.

6 cl, 3 tbl

FIELD: metallurgy.

SUBSTANCE: here is disclosed deformed, not thermally hardenable alloy on base of aluminium used in form of deformed semi-finished products as structure material, mainly, for current conducting elements of constructions in airspace engineering, ship building, cryogenic machine engineering and other branches of industry. The alloy contains wt %: magnesium 0.55-0.85, scandium 0.2-0.4, hafnium 0.02-0.05, yttrium 0.0001-0.005, aluminium - the rest.

EFFECT: increased strength, electro- and heat conductivity of alloy.

2 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: deformed not thermally hardenable alloy on base of aluminium is used in form of deformed semi-finished products as structure material, mainly for soldered units of airspace engineering produced by methods of high temperature soldering. Here is disclosed the said alloy containing wt %: manganese 0.9-1.4, magnesium 0.5-0.7, scandium 0.17-0.35, zirconium 0.05-0.12, titanium 0.01-0.05, iron 0.4-0.6, cerium 0.0001-0.0009, aluminium - the rest.

EFFECT: increased strength of alloy after high temperature solder operation facilitating reduction of weight and dimension of soldered unit of aircraft.

1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to metallurgy of aluminium based alloys, particularly to welding materials designed for making welding wire for fuse welding structures from deformable non-heat-treatable alloy of the Al-Mg-Sc system. The alloy contains the following in wt %: magnesium 5.5-6.5; manganese 0.50-0.80; scandium 0.25-0.35; zirconium 0.10-0.20; titanium 0.02-0.05; chromium 0.10-0.20; vanadium 0.005-0.04; cerium 0.01-0.05; boron 0.004-0.01; beryllium 0.002-0.005; aluminium - the rest, where Mn+Sc+Ti+Zr=0.95-1.3.

EFFECT: higher strength and plasticity of weld metal and weld joint from non-heat treatable aluminium alloy, sparingly doped with scandium.

2 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: there proposed is wrought thermally non-hardened aluminium-based alloy and item made from it, which contain components at the following ratio, wt %: magnesium 6.2-7.2, scandium 0.20-0.40, manganese 0.7-1.2, chrome 0.05-0.20, zirconium 0.05-0.15, zinc 0.2-1.0, beryllium 0.0002-0.001, copper 0.05-0.15, nickel 0.01-0.05, at least one element chosen from the group including the following: calcium 0.001-0.05, cerium 0.0005-0.001, inevitable impurities of silica of less than 0.1 and iron less than 0.15, aluminium- the rest.

EFFECT: high strength properties of alloy, high corrosion resistance of deformed semi-finished products made from it.

2 cl, 2 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy field, particularly to deformed non-heat-treatable aluminium alloys, provided for application in the form of deformed semi-finished products in the capacity of structural material principally for soldered structures of heat-exchangers of spaceships, received by methods of brazing. Alloy on the aluminium base contains the following components, wt %: manganese 0.3-0.6, magnesium 0.9-1.4, scandium 0.17-0.35, zirconium 0.05-0.12, titanium 0.01-0.05, cerium 0.0001-0.005, aluminium - the rest.

EFFECT: obtaining alloy, allowing increasing strength after brazing that provides reduction of mass and overall dimensions of manufactured structures.

1 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy field, particularly to deformed non-heat-treatable aluminium alloys, provided for application in the form of deformed semi-finished products in the capacity of structural material principally for soldered structures of heat-exchangers of temperature control system of spaceships. Deformed non-heat-treatable alloy on the aluminium base contains the following components, wt %: magnesium 0.9-1.4, scandium 0.2-0.4, zirconium 0.05-0.15, titanium 0.01-0.05, cerium 0.0001-0.005, aluminium - the rest.

EFFECT: obtaining alloy, allowing increasing strength that provides reduction of mass of manufactured from it structures.

2 tbl, 1 ex

FIELD: metallurgy, in particular aluminum-based alloys.

SUBSTANCE: claimed alloy contains (mass %) magnesium 4.0-5.6; lithium 1.3-1.8; zirconium 0.08-0.15; titanium 0.05-0.1; boron 0.0001-0.0005; beryllium 0.001-0.01; bismuth 0.01-0.1; and balance: aluminum. Alloy of present invention is useful in manufacturing of rolled, pressed and forged semimanufactured articles for construction materials, as well as in welded constructions.

EFFECT: alloy with improved ductility of main metal and welded constructions, reasonable weldability and strength of welded constructions.

3 tbl, 1 ex

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