Aluminium-based cast alloy
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.
The invention relates to ferrous metallurgy, in particular to the foundry alloys based on aluminium, used in aviation and other industries for the loaded parts of the inner set of fuselage, parts control, power brackets, etc. instead of blanking working long-term to 250°C.
Known foundry alloy based on aluminum, containing (wt.%):
|Al||the rest (Application Japan No. 58-5979)|
The alloy has low values of mechanical and casting properties.
Known for high strength cast alloy based on aluminum, containing (wt.%):
|Al||the rest (TH IS T 1583-93)|
Also known for high strength cast alloy based on aluminum, containing (wt.%):
|Al||the rest (a.c. The USSR №678889)|
Known alloys have low adaptability when casting in sand moulds.
The closest analogue, taken as a prototype, is a foundry-based alloy of aluminum containing copper, magnesium, titanium, zirconium in the following ratio, wt.%:
|Al||the rest (RF Patent No. 2080407)|
The disadvantage of the alloy of the prototype are not high enough casting properties, the coloring strength limit is and the quality of the castings.
The technical object of the present invention is to provide a foundry alloy based on aluminum with improved casting properties (fluidity and graciloplasty), tensile strength, which will improve the quality of complex configuration of shaped castings.
The goal of the project is achieved by the fact that the proposed foundry based alloy of aluminum containing copper, magnesium, titanium, zirconium, characterized in that it further contains manganese, zinc, scandium in the following ratio of components (wt.%):
It is established that at the stated ratio and a content of components with the introduction of manganese, zinc, scandium increase casting and mechanical properties.
Examples of implementation
Preparation of the experimental alloy in an electric furnace of the composition of Al - 3.5% of Cu and 0.2% Mg - 0.1% of Ti, and 0.1% Zr - 0.2% of Mn and 0.5% Zn - 0.15% of Sc.
In the pre-heated oven downloaded and melted cast aluminum. Then typed ligatures Al-Cu, Al-Mn and Al-Ti, Al-Sc, Al-Zr, magnesium and zinc, the melt was stirred, stood, were treated with porcelanato potassium. The composition of the test alloy and the values of the mechanical and technological properties are shown in tables 1, 2.
Examples 2, 3 - same as example 1, example 4 prototype. The alloy compositions shown in table 1.
Table 2 shows the mechanical and technological properties of specimens cut from castings offer alloy and alloy prototype system Al-Cu-Mg.
Mechanical properties were determined after heat treatment regime T5: hardening + artificial ageing, for the alloy of the prototype on the treatment T4: hardening + natural aging.
From table 2 it follows that for castings (cases, covers) of the proposed alloy technological properties is significantly higher compared with prototype: fluidity is increased by 20-24%, graciloplasty reduced by 60%, the linear shrinkage is reduced by 15%. The tensile strength increases by 5-7,5%.
Shaped castings have passed quality control. Marriage on the wheels is not detected.
Thus, the application of the proposed alloy system Al-Cu-Mg in products for shaped castings of complex con is Horatii internal parts kit will allow you to get high-quality castings with high technological properties in strength properties at the level of a prototype. This will reduce the intensity and increase the reliability and service life of products.
Foundry-based alloy of aluminum containing copper, magnesium, titanium, zirconium, characterized in that it further contains manganese, zinc, scandium in the following ratio, wt.%:
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.
FIELD: metallurgy of metallic materials.
SUBSTANCE: invention refers to the area of metallurgy of metallic materials with high antifriction and strength properties, used for production of slide bearings. The alloy contains components with the following ratio, % w/w: lead 7.4-9.1, tin 0.9-2.1, copper 0.4-1.6, silicone 3.4-4.6, aluminum - the rest. EFFECT: expansion of technological possibilities due to using alloy for production of sputtering targets for application of thin antifriction layer on the slide bearings, and production of alloy with homogenous highly dispersed structure and high antifriction properties.
1 cl, 1 tbl
SUBSTANCE: cast alloy on base of aluminium with reduced tendency to inter-crystallite corrosion contains wt % copper 4.0-6.2, cerium 0.08-0.10, associated impurities not more, than 0.02, aluminium - the rest. The procedure for protection surfaces of items out of cast alloy on base of aluminium with reduced tendency to inter-crystallite corrosion by means of application of coating by micro-plasma oxidation consists in oxidation of an item, corresponding to working electrode, and in alkali water solution of electrolyte containing 0.1-0.6 g/l of chemical compounds forming polymer-ions in alkali water solution. Also, oxidation is carried out at alternate symmetrical voltage spontaneously changed into asymmetrical; while duration of oxidation is equal to time when amount of intense glowing micro-discharges on surface of the item in anode half-period of alternate current flow is from 4 to 20 of micro-discharges.
EFFECT: reduced inter-crystal corrosion of aluminium alloys and reduced rate of its behaviour; production of wear resistant poor-porous external layer of coating.
3 cl, 1 tbl, 2 ex
SUBSTANCE: alloy on base of aluminium contains from 2.1 to 2.8 wt % of Cu, from 1.1 to 1.7 wt % of Li, from 0.1 to 0.8 wt % of Ag, from 0.2 to 0.6 wt % of Mg, from 0.2 to 0.6 wt % of Mn; amount of Fe and Si of each is less or equal to 0.1 wt % and unavoidable impurities in contents less or equal to 0.05 wt % each and 0.15 wt % in total. Contents of zirconium is less, than 0.04 wt %. The procedure for fabrication of the above said aluminium alloy consists in casting a plate, in homogenisation of the said plate at temperature from 480 to 520°C during from 5 to 60 hours, in hot, and, and, if necessary, cold rolling the said plate into a sheet at initial temperature of rolling from 450 to 490°C. Further, the said sheet is placed into solution at temperature from 480 to 520°C during from 15 minutes to 4 hours, and quenched, and drawn under control with residual deformation from 1 to 5%. The sheet is tempered by heating at temperature from 140 to 170°C during from 5 to 80 hours.
EFFECT: production of alloy with high mechanical strength, ductility, corrosion resistance, low density and lacking anisotropy.
12 cl, 5 dwg, 7 tbl, 1 ex
SUBSTANCE: method consists in mixing source mixture of powders of aluminium, copper and iron in air at ratio of components corresponding to domain of existence of quasi-crystalline phase of Al-Cu-Fe system alloy and in heating it in oxygen-free atmosphere. Dry components of mixture are mixed. Heating is carried out to temperature of beginning of self-propagating high-temperature synthesis. Further obtained product is crumbled to powder of required size. Also mixture is heated to temperature 530-540°C in vacuum chamber in atmosphere of inert gas or in forevacuum in pressure range 1-5·10-2 Top.
EFFECT: simplification of method, and acceleration of synthesis.
3 cl, 3 dwg, 3 ex
FIELD: technological processes.
SUBSTANCE: method includes layer-specific spraying of melted particles on part surface, at that heating of particles is carried out in plasma jet screened with supply of pyrophoric technological gas into spraying spot. Coating is sprayed from powder, initial mixture of which is taken with proportion of aluminium, copper and iron that corresponds to area of Al-Cu-Fe alloy quasi-crystalline phase existence, by heating it up to melt temperature in inertial atmosphere. At that part surface is cooled with coolant, and temperature in spot of spraying is maintanined in interval of 650-750°C.
EFFECT: preparation of coating from quasi-crystalline alloy of abovementioned system.
3 dwg, 3 ex
SUBSTANCE: invention concerns non-ferrous metallurgy. Particularly it concerns alloys on aluminium basis content, which can be used in mechanical engineering. Alloy contains following components, mass %: copper 4.0-5.0, magnesium 0.1-0.2, silicon 0.5-1.0, titanium 0.1-0.2, iron 0.05-0.1, boron 0.05-0.1, nickel 1.0-1.5, zirconium 0.1 -0.2, aluminium - the rest.
EFFECT: rising of alloy strength.
FIELD: radio-electronics, possible use for manufacturing multi-layer electronic boards used during engineering of radio-electronic equipment.
SUBSTANCE: method includes serially applying layers onto substrate, one of which layers is electro-conductive. As substrate, aluminum foil is used 50 micrometer thick, onto which firstly metal-resistive nickel or cobalt layer is applied 3-5 micrometers thick, then - electro-conductive copper or molybdenum layer 8-10 micrometers thick. Then by means of photo-lithography a pattern of electro-conductive circuit is produced, covered by dielectric oxide-chromic black-colored layer 5-8 micrometers thick. A layer of polymer 50-100 micrometers thick is applied and aluminum foil is dissolved. A variant of aforementioned method is a method, which includes using two substrates made of aluminum foil 50 micrometers thick, onto each of which firstly metal-resistive nickel or cobalt layer is applied. Then - electro-conductive copper or molybdenum layer. By means of photo-lithography pattern of electro-conductive circuit is produced, two substrates with multi-layer polymer cover are connected to one another on the side of electro-conductive circuit. Aluminum foil is dissolved and two-sided board is produced.
EFFECT: production of flexible multi-layer electronic boards on polymeric base with electro-conductive circuit well fit for soldering and resistant to oxidizing.
2 cl, 3 ex
SUBSTANCE: invention relates to aluminum-base deformable alloys. Aluminum-base material is characterized by structure comprising solid aluminum solution and secondary aluminides wherein the material comprises the following components, wt.-%: copper, 1.2-2.4; manganese, 1.2-2.2; zirconium, 0.15-0.6; vanadium, 0.01-0.15; scandium, 0.01-0.2, and aluminum, the balance. Value of equilibrium solidus of proposed material is above 600°C, hardness by Vickers is 85 HV, not less. In partial variants of the invention proposed material is made as rolled sheets prepared from cast ingots wherein heating temperature of parent ingots is not above 410°C. The material is characterized by the following mechanical properties at room temperature after annealing at 290-410°C for 1-20 h: ultimate tensile resistance strength (σB) is 300 MPa, not less; 100 h-strength (σ100) at 350°C is above 30 MPa. Invention provides making the material possessing higher strength values at increased temperature that allows decreasing mass of articles made of this material. Invention can be used in manufacturing articles working in broad range of temperature, up to 350°C.
EFFECT: improved and valuable properties of material.
4 cl, 2 dwg, 2 tbl, 3 ex
FIELD: alloy metallurgy.
SUBSTANCE: invention relates to deformable thermally non-strengthened welding alloys based on the system Al-Mn. The proposed alloy and article made of its comprise the following components, wt.-%: manganese, 0.5-1.7; calcium, 0.002-0.5; sodium, 0.0002-0.01; at least metal taken among the group comprising iron, copper, zirconium and chrome, 0.02-1.0; aluminum, the balance. Invention provides the development of alloy based on the system Al-Mn and article made of this alloy eliciting the enhanced value of creep limit and high relative elongation that provides good deformability in cold state and enhanced workability by cutting.
EFFECT: valuable properties of alloy and article.
3 cl, 2 tbl, 1 ex
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
SUBSTANCE: group of inventions can be used at manufacture of semi-finished products in the form of forgings, formings, pressed rods and channels, rolled plates and sheets from high-strength alloys of Al-Zn-Mg-Cu system, which are intended to be used in power structures of aerospace equipment and transport means, on which stringent strength, crack resistance, fatigue life, corrosion resistance requirements are imposed. In order to solve the set task, high-strength alloy on the basis of aluminium, which contains the following, wt %, is proposed: Zn 6.2-8.0, Mg 1.5-2.5, Cu 0.8-1.2, Zr 0.05-0.15, Fe 0.03-0.15, Ti 0.01-0.06, at least one element of the group of metals: Ag 0.01-0.5, Sc 0.01-0.35, Ca 0.0001-0.01, Al and inevitable impurities are the rest. In particular version of alloy the inevitable impurities include not more than 0.05 of Si, Mn, Cr, Ni and not more than 0.01 of Na, H2, O2, B, P. Method for obtaining an item from this alloy involves ingot casting, its homogenisation, hot deformation and strengthening heat treatment of the item, which includes hardening and staged ageing; at that, during the ingot casting there performed is melt purification by blowing with argon or mixture of argon with chlorine and out-of-furnace purification using rotor and/or filtering devices, and homogenisation is performed as per one-stage mode at temperature which is by 55-130°C lower than unbalanced solidus (tu.s.) temperature of this alloy with exposure during 8-36 h or as per two-stage mode at temperature at the first stage at the temperature which is by 175-280°C lower than tu.s. temperature, and at the second stage at the temperature which is by 75-125°C lower than tu.s., with exposure at each stage to 24-36 h; hot deformation is performed at temperature of 300-420°C, hardening is performed at temperature which is by 50-120°C lower than tu.s. during the time determined with the item thickness, with further cooling to temperature of not more than 80°C.
EFFECT: improving the set of mechanical and corrosive characteristics, and characteristics of crack resistance, life time and manufacturability.
10 cl, 1 tbl
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
SUBSTANCE: alloy on base of aluminium contains following components wt %: zinc 5-8, magnesium 2-3.1, nickel 1-4.2, iron 0.02-1, zirconium 0.02-0.25 %, copper 0.05-0.3 %. Also, temperature of equilibrium solidus of material is as high as 550°C and hardness is as high as 180 HV. Alloy has a structure corresponding to matrix formed with solid solution of aluminium with uniformly distributed disperse particles of secondary discharges in it and particles of aluminides containing nickel and iron of eutectic origin uniformly distributed in matrix. Also, alloy contains matrix and aluminides at the following ratio, vol % aluminides containing nickel and iron 5.0-6.3, matrix - the rest.
EFFECT: production of new high-strength alloy thermally hardenable and designed both for fabrication of shaped casting and of deformed semi-products.
4 cl, 5 tbl, 4 ex
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
SUBSTANCE: invention refers to deformed alloys of aluminium-zinc-magnesium-scandium system and to procedure for their production. Aluminium alloy contains from 0.5 to 10 wt % Zn, from 0.1 to 10 wt % Mg, from 0.01 to 2 wt % Sc, at least 0.01 wt % at least one alloying additive chosen from Ag at amount of up to 1 wt % and Sn at amount of up to 0.5 wt %, aluminium and unavoidable additives - the rest. The procedure consists in production of the said aluminium alloy, in homogenisation, in extrusion, in treatment for solid solution, in quenching, in straightening with drawing and in ageing.
EFFECT: alloys possess good qualities such as relatively high strength and excellent corrosion resistance.
33 cl, 3 dwg, 4 tbl
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
SUBSTANCE: aluminium-based alloy contains the following, wt %: zinc 0.5-0.7; titanium 0.1-0.13; silver 1.1-1.3; nickel 0.25-0.5; copper 0.15-0.25; cobalt 0.7-0.9; aluminium - the rest.
EFFECT: alloy is characterised with increased strength.
1 tbl, 3 ex
SUBSTANCE: invention refers to metallurgy of protecting alloys on base of aluminium and can be implemented at production of protectors for aluminium heat exchangers on airplanes, sea and river vessels, domestic heaters and also fuselages of hydroplanes and vessels out of aluminium alloys for protection from corrosion. Protecting deformed alloy on aluminium base contains following components, wt %: zinc 1.8-3.0, magnesium 0.4-0.8, silicon 0.3-0.6, tin 0.03-0.07, indium 0.06-0.07, aluminium - the rest.
EFFECT: production of protecting alloy possessing upgraded mechanical properties which facilitates fabrication of protectors of various shape, small dimensions and big length.
2 tbl, 1 ex
SUBSTANCE: invention refers to deformed thermally hardened high-tensile aluminium alloys Al-Zn-Mg-Cu designed for fabrication of all kinds of deformed semi-finished products, including thin sheets used in aircraft and machine engineering and other branches of industry. Deformed alloy on base of aluminium and an item out of it contain the following components, wt %: zinc 2.5-4.0, magnesium 4.1-6.5, copper 0.2-1.0, iron to 0.25, silicon to 0.15, scandium 0.005-0.3, zirconium 0.005-0.25, nickel and/or cobalt to 0.1, titanium to 0.15, boron and/or carbon to 0.05, at least one element out of group: hafnium to 0.15, molybdenum to 0.15, cerium to 0.15, manganese to 0.5, chromium to 0.28, yttrium to 0.15, vanadium to 0.15, niobium to 0.15, aluminium and unavoidable impurities - the rest, also ratio of Mg contents to Zn contents is more or equal to 1.1.
EFFECT: production of alloy and items out of it possessing raised strength properties at simultaneous increased wear-resistance, reduced rate of crack growth, increased durability of welded connections and reduced density, which results in increased resource and reliability of items operation and in reduced weight of structures.
3 cl, 2 tbl, 1 ex
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