Solder for soldering aluminium and alloys thereof
FIELD: metal processing.
SUBSTANCE: invention can be used in producing soldered structures from aluminium and its alloys. Solder contains components in following ratio, wt%: silicon 5-13, copper 1-13.5, zinc 2-10, nickel 0.5-4.5, tin 0.1-0.3, at least one element from a group comprising strontium 0.001-0.2, sodium 0.001-0.2, titanium 0.001-0.1, vanadium 0.001-0.2, at least one element selected from a group of cobalt 0.001-0.8, molybdenum 0.001-0.8; beryllium 0.001-0.1, aluminium - balance. Total content of zinc and copper is not more than 15 wt%, ratio of nickel content to copper ranges from 1:2 to 1:4. During vacuum soldering solder additionally contains magnesium in amount of 0.1-1 wt%.
EFFECT: solder provides high level of strength of soldered joint with possibility of conducting process of soldering at temperatures below 590 °C, which enables to use in soldered structures of most modern structural aluminium alloys.
1 cl, 2 tbl, 3 ex
SUBSTANCE: aluminium-copper alloy for casting, containing in fact insoluble particles, which occupy inter-dendritic regions of the alloy, and free titanium in an amount, sufficient for crushing the granular structure in the casting alloy. The alloy contains, wt %: Cu 3.0-6.0 , Mg 0.0-1.5, Ag 0.0-1.5, Mn 0.0-0.8, Fe 0.0-1.5, Si 0.0-1.5, Zn 0.0-4.0, Sb 0.0-0.5, Zr 0.0-0.5, Co 0.0-0.5, free titanium >0.15-1.0, insoluble particles 0.5-20, Al and inevitable admixtures - the remaining part. The insoluble particles occupy the inter-dendritic regions of the alloy and contain particles of titanium diboride.
EFFECT: aluminium-copper alloy possesses high plasticity and tensile strength, as well as fatigue life.
8 cl, 7 dwg
SUBSTANCE: invention relates to metallurgy, in particular to the deformed nanostructure alloys based on aluminium, and to the methods of their production for items working under high temperatures. Aluminium-based alloy contains the following components in wt %: copper 0.5-0.85; manganese 0.5-0.95; boron 0.02-0.15; zirconium 0.1-0.5; scandium 0.02-0.15; iron 0.01-0.3; silicon 0.01-0.15, inevitable admixtures 0-0.1, from them each 0-0.03, aluminium - rest. At that boron presents in the alloy structure in form of the nanoparticles AlB2, AlB12, borides of transient metals with average size 50 nm maximum, at that the alloy has conductivity over 54% IACS and tensile strength (σB) after 400 hours of heating at 250°C at least 160 MPa. According to the second option the alloy contains in wt %: copper 0.9-2.0, manganese 1.0-1.6, boron 0.02-0.15; zirconium 0.1-0.5; scandium 0.02-0.15; iron 0.01-0.3; silicon 0.01-0.15, inevitable admixtures 0-0.1, from them each 0-0.03, aluminium - rest, at that the boron presents in the alloy structure in form of the nanoparticles AlB2, AlB12, borides of transient metals with average size 50 nm maximum, at that the alloy has tensile strength after 400 hours of heating at 250°C up to 230-280 MPa. Method includes the melt preparation at temperature by 100°C above temperature of the melt liquidus, at that the alloying components are added to the melt in form of addition alloys, having fine structure with average size of the nanostructures 1500 nm maximum, crystallisation and deformation under action of the magnetic pulse field and/or low pulse current.
EFFECT: improvement of the alloy thermal resistance and conductivity.
8 cl, 2 tbl, 1 ex
SUBSTANCE: invention relates to the field of metallurgy, namely, to deformable aluminium-based alloys, and can be used for obtaining of products operating in a temperature range up to 350°C. The alloy contains, by wt %: The alloy contains, by wt %: 0.6-1.5 Cu; 1.2-1.8 Mn; 0.2-0.6 Zr; 0.05-0.25 Si; 0.1-0.4 Fe; 0.01-0.3 Cr; the rest is Al, meanwhile the alloy contains zirconium in the structure as nano-particles of the phase Al3Zr with the size no more than 20 nm, and manganese mainly forms secondary phase separations Al20Cu2Mn3 with the size no more than 500 nm with amount not less than 2%. The method of obtaining of deformed semi-finished product from the named alloy includes preparation of melt and obtaining of casting block by melt crystallisation at the temperature, at least 50°C higher than liquidus temperature, deforming of the casting block in two stages with a process annealing at 340-450°C, at the temperature not higher than 350°C, with obtaining of the intermediate deformed semi-finished product, anneal of the obtained semi-finished product at the temperature 340-450°C and its deforming at room temperature until obtaining of the ready deformed semi-finished product and anneal of the ready deformed semi-finished product at the temperature 300-400°C.
EFFECT: improvement of strength, thermostability and conductivity of aluminium-based alloy, and also deformed semi-finished products like sheets, bars, wire, press formings, pipes made from it.
7 cl, 6 ex, 8 tbl 3 dwg
SUBSTANCE: antifriction aluminium-based alloy contains the following components, wt %: silicon - 12-15, copper - 3-5, aliminium is the rest, and it has a structure containing crystals of eutectic silicon of globular shape with the size of 2 to 8 mcm.
EFFECT: increasing wear resistance of alloy at sliding friction.
SUBSTANCE: recrystallised rolled sheet of aluminium alloy 2xxx features height not exceeding 12.7 mm (0.5 inch). At least 60% of said rolled sheet are recrystallised grains. Sid rolled stock features brass and Goss textures. Note here that brass texture makes at least 10 and is larger than Goss texture. Proposed method comprises hot rolling and cold processing of aluminium 2xxx alloy sheet, subjecting said sheet to first recrystallisation annealing, at least one stape (i) of cold processing and (ii) reducing annealing, (d) second recrystallisation annealing and (e) age-hardening.
EFFECT: recrystallised rolled sheet of aluminium alloy 2xxx with better strength and ductility.
44 cl, 21 dwg, 1 tbl, 5 ex
SUBSTANCE: aluminium alloy is prepared, reheated over alloy liquidus curve temperature. Copper is added into the aluminium melt in the form of a wire, at the same time electric current is sent between the wire and the melt. Wire melting is carried out without formation of an arc at the ratio of current density to speed of wire feed equal to 0.3-1.0·1010 A·s/m.
EFFECT: invention makes it possible to reduce losses of alloying components and to reduce energy intensity of production of aluminium-copper alloys.
SUBSTANCE: proposed article comprises the following components in wt % Cu - 3.4-5.0, Li - 0.9-1.7, Mg - 0.2-0.8, Ag - 0.1-0.8, Mn - 0.1-0.9, Zn - 0.1-1.5 and one or several elements selected from the group consisting of (Zr - 0.05-0.3, Cr - 0.05-0.3, Ti - 0.03-0.3, Sc - 0.05-0.4, Hf - 0.05-0.4), Fe<0.15, Si<0.5, common and unavoidable impurities and the rest composed of aluminium. It relates also to method of making articles from this alloy.
EFFECT: higher strength and ductility.
13 cl, 3 tbl, 1 ex
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
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.
SUBSTANCE: proposed alloy contains the following components, in wt %: copper 3.50-4.50, magnesium 1.20-1.60, manganese 0.30-0.60, zirconium 0.01-0.15, silver 0.01-0.50, iron 0.01-0.12, silicon 0.01-0.08, titanium 0.01-0.06, scandium 0.01-0.20, calcium 0.001-0.05, at least, one element from the GROUP including nickel 0.005-0.05, hafnium 0.01-0.10. Note here that total amount of Fe+Si≤0,15 at Fe/Si≥1.2, aluminium making the rest.
EFFECT: higher strength, crack resistance and fatigue strength.
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
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: invention relates to method of production of the multi-layer material for high temperature brazing, and can be used, for example, to manufacture heat exchange sheets. The method ensures core layer out of first aluminium alloy containing in wt %: 0.5-2.0% Mn, < 1.0% Mg, < 0.2% Si, < 0.3% Ti, < 0.3% Cr, < 0.3% Zr, < 0.2% Cu, < 3% Zn, < 0.2% In, < 0.1% Sn, and < 0.7% (Fe+Ni), Al rest and <0.05% each of inevitable admixtures; assurance of the barrier layer out of second aluminium alloy containing in wt %: < 0.2% Mn+Cr, < 1.0% Mg, 1.6-5% Si, < 0.3% Ti, < 0.2% Zr, < 0.2% Cu, < 3% Zn, < 0.2% In, < 0.1% Sn and < 1.5% (Fe+Ni), Al rest, and < 0.05% each of inevitable admixtures; joint rolling of layers; heat treatment at temperature from 300 to 550°C for time period necessary to balance content of Si to 0.4-1% both in core layer, and in barrier layer; rolling of the multi-layer material to final thickness with compression degree from 8 to 33%.
EFFECT: invention increases strength properties, especially creeping and fatigue strength, and corrosion resistance of the multi-layer material.
24 cl, 7 dwg, 4 tbl, 3 ex