Aluminum-base material

FIELD: metallurgy.

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

 

The invention relates to the field of metallurgy materials based on aluminum and can be used to obtain products operating under high loads at temperatures up to 100-150°such as parts of automobiles and other vehicles (bicycles, scooters, trucks), details of sports equipment and other

Deformable thermally hardened aluminum alloys based on Al-Zn-Mg type 1915 (GOST 4784-75) have a good combination of technology (handling pressure, weldability), corrosion resistance and mechanical properties (Industrial aluminum alloys. /Ref. ed./ Aliyev YEAR, Altman MB and other M, metallurgy, 1984. S).

They have average strength (σin=300-400 MPa), since the total content of magnesium and zinc in them does not exceed 7-8%. If you increase this value, the strength increases, however, the alloys become sensitive to intergranular fracture, which adversely affects ductility, fatigue properties, fracture toughness, and resistance to corrosion under stress.

The disadvantage of alloys based on Al-Zn-Mg is a high propensity for hot cracking during solidification, which complicates their use for shaped castings of relatively complex shape.

Higher strength (σIn=500-600 MPa) have with the lava type B95-based system Al-Zn-Mg-Cu (Industrial aluminum alloys. /Ref. ed./ Aliyev YEAR, Altman MB and other M, metallurgy, 1984. S.), however, their casting properties worse than alloys without copper, so the alloys on the basis of this system is practically not used as a foundry.

The General lack of industrial alloys based on Al-Zn-Mg-Cu is a strong sensitivity of mechanical properties to iron impurities. So when you want an increased level of these properties, you must apply for the production of such alloys aluminum of high purity, which affects the value.

The closest material to the invention is a material disclosed in patent RU 2004610 (application 5012802 from 25.11.91,).

This material contains zinc, magnesium, copper, Nickel and iron in the following component ratio, wt.%:

Zinc5-7
Magnesium1,2-2,2
Copper0.6 to 1.4
Nickel0,9-1,5
Iron1,0-1,6
Silicon0,1-0,5
Chrome0,03-0,2
Vanadium0,01-0,15
AluminumRest

From this material it is possible to obtain castings with improved foundry and mechanical properties for the odd addition of Nickel and iron, which forms aluminides eutectic origin. While the alloys can be prepared from aluminum technical marks.

However, to achieve high strength properties, you must ensure that these aluminides globular form, which requires the operation of spheroidizing annealing. As copper, which is a known material, greatly reduces the equilibrium solidus (medium composition, it is below 520° (C)it requires a relatively high dispersion of the original structure, which limits the use of the proposed alloy is relatively small castings simple form. As ingots intended for receiving a deformable semi-finished products, have a relatively large size, the cooling rate is usually lower than 2 K/S. Therefore, the use of the material specified in the patent RU 2158780 as deformable difficult. In addition, the presence of copper in the latter reduces the ductility at handling pressure.

Object of the invention is the creation of new high-strength material, intended to obtain shaped castings and deformed semi-finished products (ingots)with high mechanical properties (not lower than that of aluminum alloys type B95).

The problem is solved by the fact that the material based on aluminum containing zinc, magnesium, Nickel, iron and silicon, further comprises zirconium and scandium in the following component ratio, wt.%

Zinc6-8
Magnesium2,5-3,5
Nickel0.6 to 1.4
Iron0,4-1
Silicon0,02-0,2
Zirconiaof 0.1-0.3
Scandium0,05-0,3
AluminumRest

at this temperature the equilibrium solidus of the material is not less than 540°and the hardness of the material is not less than 200 HV.

The material may be in the form of castings, with the following properties tensile: tensile strength (σin) - not less than 600 MPa, the yield strength (σof 0.2) - not less than 560 MPa elongation (δ) - not less than 3%.

Furthermore, the material may be in the form of rolled sheets, with the following properties tensile: tensile strength (σin) not less than 640 MPa, yield strength (σof 0.2) not less than 600 MPa, elongation (δ) not less than 4%.

The material can also be made in the form of extruded rods, with the following properties tensile: tensile strength (σin) not less than 680 M is a, yield strength (σof 0.2) not less than 640 MPa, elongation (δ) not less than 5%.

The invention consists in the following.

Zinc and magnesium in the claimed limits are in the aluminum matrix in the form of secondary allocations, in particular metastable phases T'(Al2Mg3Zn3and η'(MgZn2), which makes a major contribution to the strength of the material. The absence of copper, on the one hand, increases the equilibrium solidus, and on the other, improves the casting properties of the alloy.

Iron and Nickel in the claimed limits are in the eutectic phase inclusions Al9FeNi that, on the one hand, improves the casting properties, and on the other, prevents the formation of coarse grain boundary precipitates phases of Al2Mg3Zn3and MgZn2that adversely affect the ductility and other mechanical properties. Silicon is included in the phases of Al9FeNi and Mg2Si and increases the homogeneity of the structure.

Zirconium and scandium in the claimed limits, forming a secondary allocation phase of Al3(Zr,Sc) contribute additional padding without reducing ductility and casting properties.

All the above satisfy the materials obtained from alloys of aluminum containing zinc 6-8, magnesium 2,5-3,5, Nickel 0.6 to 1.4, iron 0,4-1, zirconium, 0.1 to 0.3 and scandium 0,05-0,3.

EXAMPLE 1.

Were you need a kitchen is Lena 6 alloys, the compositions listed in table 1. The alloys were prepared in an electric resistance furnace in gravitometric crucible of aluminum grades A7 (for compounds 2, 3, 5, 6) and A99 motorway (for trains 1 and 4), zinc mark COX (99,9%), magnesium brand Mg 90 (99,9%), copper M1 (99,9%), silicon Cu 00 and alloys: Al-20% Ni, Al-10% Fe, Al-3.5% of Zr, Al-10% Cr, Al-3% V and Al-2% Sc. Temperature casting alloys was 710-800°depending on the composition, mechanical properties tensile strength, volume fraction of the phases and the equilibrium solidus (Ts) (table 1) was determined on samples cut from heat-treated castings obtained by casting in moulds with cooling rate (VC10/C. Casting thermoablative on the treatment T6 (heating for hardening, quenching in cold water and aging). The equilibrium solidus was determined by the method of differential thermal analysis.

td align="center"> 0,01
Table 1
No.Concentration, mass%HV1)PG2)mmTs3), °
ZnMgNiFeSiZrScAl
1520,30,20,050,02leave155>16590
263,50,60,40,20,10,3leave20512543
37310,80,110,20,1leave22012548
482,51,410,020,30,05leave21512552
59421,50,50,40,4leave23014510
661,71,21,30,31 Cu;leave17514520
0,1 Cr; 0,1
1)hardness Vickers

2)the rate of graciloplasty by pencil test

3)temperature equilibrium solidus.

From table 1 it is evident that only the claimed alloy (compounds 2-4) provides a better indicator of graciloplasty (GHG)emissions. In alloy 1 hardness less than the required level, and alloy 5 has a low value of TS. Alloy-prototype (part 6) yields for all three indices.

The mechanical properties of the castings were determined on cylindrical samples according to GOST 1497-84.

From table 2 it is seen that the alloys 2-4 noticeably superior to alloy 1 on the strength properties, and alloys 5 and 6, in addition, and plasticity.

Table 2

Mechanical properties after quenching and aging) of the experimental alloys castings
No.1)σin, MPaσof 0.2, MPaδ, %
136524015
26104303,5
36205404
46155103,5
53103100
65204801
1)according to table 1

EXAMPLE 2.

Prepared sheets of thickness 2 mm technology, which included the following operations: receiving a flat ingot thickness of 15 mm, annealing the ingot, hot rolling the ingot (receiving sheet), heat treatment of the sheet (using the quenching operation).

The mechanical properties of the rods was determined in the longitudinal direction on flat samples according to GOST 1497-84. From table 3 it follows that the alloys 2-4 significantly superior to alloy 1 on the strength properties of other alloys do not provide high-quality sheet, because in the process of rolling cracks.

Table 3

Mechanical properties of experimental alloys in sheets
No.*σIn, MPaσof 0.2, MPaδ, %HV
136026015135
26456056205
36556105215
46506104,5210
5cracks during rolling
6 cracks during rolling
1)according to table 1

EXAMPLE 3.

Prepared the rod with a diameter of 10 mm on the technology, which included the following operations: obtaining an ingot with a diameter of 50 mm, annealed ingot, extrusion ingot (receiving rod), heat treatment of the rod (using the quenching operation).

Table 4

Mechanical properties of experimental alloys in rods
No.*σIn, MPaσof 0.2, MPaδ, %HV
136026015140
26906507210
37106906220
46906705,5225
5cracks in the pressed
6cracks in the pressed
1)according to table 1

The mechanical properties of the rods was determined in the longitudinal direction on the cylindrical samples according to GOST 1497-84. From table 3 it follows that the alloys 2-4 significantly superior to alloy 1 to prochnosti the properties, other mechanical properties. It should be noted that the alloys 5 and 6 do not provide a quality rod, because in the process of pressing cracks.

The typical structure (SEM) of the claimed material is shown in the drawing, where as - cast, b - rod.

1. Material based on aluminum containing zinc, magnesium, Nickel, iron and silicon, characterized in that it further contains zirconium and scandium in the following ratio, wt.%:

Zinc6-8
Magnesium2,5-3,5
Nickel0.6 to 1.4
Iron0,4-1
Silicon0,02-0,2
Zirconiaof 0.1-0.3
Scandium0,05-0,3
AluminumRest

at this temperature the equilibrium solidus of the material is not less than 540°and the hardness of the material is not less than 200 HV.

2. The material according to claim 1, characterized in that it is obtained in the form of castings, with the following properties tensile: tensile strength (σin) - not less than 600 MPa, the yield strength (σof 0.2) - not less than 560 MPa elongation (δ) - not less than 3%.

3. The material according to claim 1, the best of the decomposing those what he received in the form of a rolled sheet with the following properties tensile: tensile strength (σin) - not less than 640 MPa, yield strength (σof 0.2) - not less than 600 MPa, elongation (δ) - not less than 4%.

4. The material according to claim 1, characterized in that it is obtained in the form of extruded rod, with the following properties tensile: tensile strength (σin) - not less than 680 MPa, yield strength (σof 0.2) - not less than 640 MPa, elongation (δ) - not less than 5%.



 

Same patents:

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

Aluminum-base alloy // 2280092

FIELD: metallurgy.

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.

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EFFECT: enhanced corrosion protection.

2 tbl

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FIELD: metallurgy.

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.

2 tbl

Aluminum-base alloy // 2280092

FIELD: metallurgy.

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

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EFFECT: enhanced corrosion resistance and technological ductility of semi-finished items at plastic metal working.

2 tbl, 1 ex

FIELD: metallurgy.

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.

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2 cl, 2 tbl

FIELD: metallurgy.

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.

1 tbl

FIELD: metallurgy.

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.

FIELD: metallurgy.

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.

FIELD: metallurgy.

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

Aluminum-base alloy // 2319762

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.

1 tbl

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