Aluminium-based protective alloy

FIELD: metallurgy.

SUBSTANCE: proposed composition contains the following substances, in wt %: zinc - 4-5, indium - 0.01-0.1, zirconium - 0.01-0.1, titanium - 0.02-0.1, aluminium and impurities making the rest. Content of impurities in the alloy of iron, silicon and copper may no exceed 0.1, 0.1 and 0.01, respectively, while that of hydrogen must no exceed 0.20 cm3/100 g Me.

EFFECT: higher efficiency and stability of electrochemical characteristics.

2 cl, 3 tbl

 

The invention relates to metallurgy sacrificial alloys based on aluminum and can be used in the manufacture of treads for corrosion protection of offshore structures and vessels made of aluminum alloys.

Known sacrificial alloys based on aluminum, used for corrosion protection of metal constructions (see the grades AP1; AP; AP, AP4 according to GOST 26251-84 and APN on THE 5.394-11785-2001).

It is known that the melting of aluminum alloys in the composition falls hydrogen, especially if this process takes place in the presence of moisture. According to various sources, its content can reach 2-3 cm3/100 g Me. The influence of hydrogen results primarily in the formation of gas porosity of the alloy, which has a significant impact on the mechanical, plastic, and that is especially important for the protectors, the electrochemical characteristics of the protective alloy. The formation of pores due to a sharp decrease in the solubility of hydrogen during solidification of the alloy and selection as a consequence of molecular hydrogen.

Table 1 provides data on the influence of hydrogen on the mechanical properties of aluminum alloy grades A14.

Table 1
Melt conditionsDensity, g/cm3Strength, σinkg/mm2
In the vacuum2,724,4
In the air2,6523
In the atmosphereto 2.5715
In the air;
solidification in a steam atmosphere
2,5the 9.7

In the study of electrochemical characteristics of aluminum tread alloys it was found that with increasing content of hydrogen from 0.18 to 0.8 cm3/100 g Me tomodachi reduced from 2400 to 2100 And×h/kg Simultaneously with the reduction of tomodachi there is uneven pinpoint the nature of the dissolution of the protectors of this alloy, and therefore, reduction in size tomodachi and service life of products made from these alloys.

The analysis of domestic and foreign literature showed that the closest to the technical essence and composition of the components of the claimed composition is aluminum tread alloy brand APN (patent No. 2263154)that contains, wt%:

Zinc 4,0-5,0

Tin - 0,01-0,1

Indium - 0,01-0,06

Zirconia - 0,01-0,1

Iron - 0,10

Copper - 0,01

To emni - 0,10

Aluminum - rest

This alloy is recommended for production of protectors with high anodic activity (negative protection to minus 800 mV), designed for corrosion protection of structures, of aluminium alloys used in marine and other waters with high conductivity, as well as steel structures, operating in waters with low conductivity. The disadvantage of the prototype is relatively high porosity of the alloy, which reduces the electrochemical characteristics - size tomodachi, lack of efficiency coefficient (CPR), which defines the service life of products made from this alloy.

Up to the present time in the production of aluminium protectors hydrogen content in the alloys is not regulated. The number of known materials which, when added to the melt due to the ability to absorb and high solubility of hydrogen significantly reduce the hydrogen content in the melt. These include titanium, lanthanum, cerium, and some others.

The technical result of the present invention is the creation of new aluminum less porous sacrificial alloy with uniform structure and higher density, high electrochemical characteristics (tomodachi, CRPD), defining the term SL is gby.

The technical result is achieved by the fact that the tread alloy on an aluminum base containing zinc, indium, tin, zirconium, added titanium in the following components in wt.%:

Zinc - 4,0-5,0

Indium - 0,01-0,06

Tin - 0,01-0,1

Zirconia - 0,01 -0,1

Titanium - 0,02-0,1

Aluminum and impurities - rest

The content of impurities in the alloy of iron, silicon and copper must not exceed 0.1, 0.1, and 0.01, respectively, and the hydrogen content in the alloy should not exceed 0,20 cm3/100 g Me.

The ratio of the alloying elements in the inventive composition is selected so that the structure and the basic electrochemical properties of aluminium sacrificial alloy provided the desired complex technological and operational characteristics.

The titanium content in the alloy should not exceed 0.1 wt.%, since higher contents it forms with separate aluminum cathode phase composition of AlnTimthat stands out from the solid solution and reduces the electrochemical characteristics of the alloy. At a lower content of titanium (0,02-0,1 wt.%) it does not form a separate phase and is a solid solution of aluminum and does not affect the electrochemical characteristics, but is sufficient to reduce the hydrogen content in aluminum alloy due to absorption t is in titanium to hydrogen. When the titanium content is less than 0.02 wt.% cleaning aluminum alloy from hydrogen insufficient.

Thus, the introduction in the inventive aluminum tread alloy additives of titanium in a specified ratio with other elements reduces the porosity of the alloy by reducing the hydrogen content due to the high absorption ability of titanium to hydrogen and thus improves its structure. The specified content of titanium does not form with the aluminum cathode phase structures, which would adversely affect the electrochemical characteristics of the inventive aluminum alloy, and thus provides higher and more stable coefficient of uses and, ultimately, increases its service life. The results of the composition of the inventive aluminum tread alloy are presented in table 2.

Metallographic examination showed that the claimed alloy is a homogeneous single-phase structure. Alloy structure is fine-grained, dense. All this confirms the high electrochemical and operational characteristics of the claimed alloy.

In CRISM "Prometey" in accordance with the plan of scientific-research works carried out pilot work on the melting of the protectors of the master alloy grade. The metal was melted in induction furnaces with Grafite is now the crucible of clean charge materials. The results of determining necessary and electrochemical performance properties are presented in table 3.

Thus, created a new tread base alloy of aluminum with high anodic activity with time-stable electrochemical performance.

The expected technical and economic effect of the use of new technical solutions will help increase the service life of aluminum sacrificial alloy and ensuring operational reliability and lifetime of vessels with aluminum alloys type AMG. In addition, the protectors of the proposed new alloy will find wide application in electrochemical systems cathodic protection of ships and various Maritime objects equipment operated in desalinated sea basins, also in the cold Arctic seas, where due to the low temperature conductivity of sea water does not exceed 3 Cm/m

1. Protective aluminum alloy base containing zinc, indium, tin, and zirconium, characterized in that it further doped titanium at the following content, wt.%:

Zinc4-5
Indies0,01-0,06
Tinof 0.01-0.1
Zirconiaof 0.01-0.1
Titanium0,02-0,1
Aluminum and impuritiesRest

2. Protective aluminum alloy base according to claim 1, characterized in that as impurities it contains iron, copper, silicon, and hydrogen at their contents:

Ironnot more than 0.1 wt.%,
Coppernot more than 0.01 wt.%,
Siliconnot more than 0.1 wt.%,
HydrogenNot more than 0.20 cm3/100 g Me



 

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4 tbl, 3 ex, 2 dwg

FIELD: metallurgy.

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12 cl, 8 dwg, 6 tbl, 2 ex

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2 cl, 2 tbl, 1 ex

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32 cl, 10 dwg, 10 tbl, 4 ex

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5 cl, 1 tbl

FIELD: metallurgy.

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2 cl, 3 tbl

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3 tbl, 1 ex

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2 tbl

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30 cl, 8 tbl, 3 ex

FIELD: metallurgy.

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10 cl, 1 tbl

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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

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

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.

SUBSTANCE: invention relates to ultrastrong economically alloyed aluminum-based alloys belonging to system Al-Zn-Mg-Cu. Alloy and article made therefrom are, in particular, composed of, %: zinc 3.5-4.85, copper 0.3-1.0, magnesium 1.2-2.2, manganese 0.15-0.6, chromium 0.01-0.3, iron 0.01-0.15, silicon 0.01-0.12, scandium 0.05-0.4, at least one element from group: zirconium 0.05-0.15, cerium 0.005-0.25, and aluminum - the rest.

EFFECT: increased characteristics of corrosion resistance, bondability with all welding techniques, and lowered fatigue crack growth rate.

2 cl, 2 tbl

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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