Structural deformable thermally neurocinema alloy based on aluminum

 

The invention relates to metal alloys, in particular thermally deformable neurocinema alloys intended for use in the form of deformed semi-finished products as a structural material. Proposed alloy containing the following components, wt.%: magnesium 5,0-5,6; titanium 0,01-0,03; beryllium is 0.0002-0,005; zirconium 0,05-0,12; scandium 0,16-0,26; cerium is 0.0002-0,0009; manganese 0.15 to 0.5 and the group of elements including iron and silicon 0,05-0,12; aluminum - else, while the ratio of iron content to the silicon content must be equal to or greater than one. The technical result of the invention is to provide an alloy with a higher static characteristics of strength, fracture toughness and cyclic crack resistance compared to known. table 2.

The present invention relates to metal alloys, in particular thermally deformable neurocinema alloys intended for use in the form of deformed semi-finished products as a structural material.

Known in metallurgy structural deformable thermally neurocinema alloys based on aluminum (see GOST 4784-74), in particular the alloy AM

Aluminum Else

However, the existing alloy has low strength characteristics, in particular low yield strength deformed semi-finished products in the annealed and hot-deformed States.

Known thermally deformable neurocinema alloy based on aluminum, designed for use in the form of deformed semi-finished products as a structural material (see patent RU No. 2085607, M. class. With 22 21/06 - prototype), the following chemical composition, wt.%:

Magnesium 3,9-4,9

Titanium of 0.01-0.1

Beryllium is 0.0001-0,005

Zirconium 0.05 to 0.15

Scandium 0,20-0,50

Cerium 0,001-0,004

Aluminum Else

Known alloy has insufficient high performance static strength, fracture toughness and cyclic fracture toughness at high technology in metallurgical production, high corrosion resistance, good weldability and high performance at cryogenic temperatures.

Proposed structural deformable thermally neurocinema the base alloy of aluminum containing magnesium, titanium, beryllium, zirconium, scandium and cerium, which additionally contains manganese and the group of elements including iron and silicon, and the comp is 0,05-0,12

Scandium 0,16-0,26

Cerium is 0.0002-0,0009

Manganese 0,15-0,5

Group of elements, including

iron and silicon 0,05-0,12

Aluminum Else

thus the ratio of iron content to the silicon content must be equal to or greater than one.

We offer alloy differs from the known fact that it further contains manganese and the group of elements including iron and silicon, in the following ratio, wt.%:

Magnesium 5,0-5,6

Titanium 0,01-0,03

Beryllium is 0.0002-0,005

Zirconium 0,05-0,12

Scandium 0,16-0,26

Cerium is 0.0002-0,0009

Manganese 0,15-0,5

Group of elements, including

iron and silicon 0,05-0,12

Aluminum Else

thus the ratio of iron content to the silicon content must be equal to or greater than one.

The technical result is an improvement of the characteristics of static and dynamic strength of the alloy, which allows to increase the service life, reliability and characteristics of weight structures, working in conditions of static and dynamic loads, in particular of aircraft constructions, including working on cryogenic fuel.

Under the proposed content and ratio of components in the proposed alloy secondary is perehodnye metals, included in the alloy provides a high level of static strength. At the same time sufficiently flexible matrix, which are, basically, a solid solution of magnesium and manganese in aluminium, due to the high stock of plasticity provides high resistance alloy development of cracks under static and cyclic loading. Regulated by the ratio of iron content to the silicon content when they are low enough total concentration optimizes the morphology of primary intermetallics crystallization origin containing mainly aluminum, iron and silicon, contributing to the slight increase of the static strength of the alloy while maintaining ductility.

Example.

Using as a mixture of aluminum brand A99 motorway, magnesium Mg, double ligatures aluminum-titanium, aluminium-beryllium, aluminum-zirconium, aluminium-scandium, aluminium-cerium, aluminum-manganese, aluminum-iron alloy in an electric furnace was prepared by the melt and the method of semi-continuous casting cast slabs section 165550 mm from the proposed composition of the alloy with a minimum of (1), optimal (part 2), maximum (3) the content component is In the manufacture of alloy in industrial conditions metallurgical production as charge materials is possible using standard waste aluminum-magnesium alloys.

The ingots are homogenized, processed mechanically to a thickness of 140 mm, after which the hot rolling mill at 400With rolled to a thickness of 7 mm, and then cold rolling mill to a thickness of 2 mm Obtained cold-rolled sheets were subjected to annealing in an electric furnace with air circulation. The annealed sheets were used as the material to be tested. The tests were carried out at room temperature.

In the direction across the rolling cut standard flat samples and determined the mechanical properties under static tensile: tensile strengthInyield strengthof 0.2, elongation.

Tests for fracture toughness (static crack resistance) was performed on a servo-hydraulic testing machine MTS-100. Determined critical value of the conditional intensity factor stresson transverse specimens width=200 mm

Tests on cyclic crack resistance was performed on a servo-hydraulic machine S-10. Loading cross designs

width=200 mm was carried out in a sinusoidal cycle with a frequency of f=10 Hz, the asymmetry of the CEC is different voltagesK=31,2.

The results are given in table. 2.

As can be seen from the table. 2, the proposed alloy has a higher static characteristics of strength, fracture toughness and cyclic crack resistance compared to known. The application of the proposed alloy as a structural material will allow for 10-15% reduction in the weight of the structures, to increase their reliability and durability, which is especially important for aircraft. Good weldability and high corrosion resistance, we offer alloy, characterized thermally neurocinema alloys based on aluminum, you can use it when creating new types of aircraft using welding as the primary network. We offer alloy can be used in welded structures as the base metal and the filler material to the weld fusion.

Claims

Structural deformable thermally neurocinema the base alloy of aluminum containing magnesium, titanium, beryllium, zirconium, scandium and cerium, characterized in that it further contains manganese and the group of elements including glands is 2-0,005

Zirconium 0,05-0,12

Scandium 0,16-0,26

Cerium is 0.0002-0,0009

Manganese 0,15-0,5

Group of elements, including

iron and silicon 0,05-0,12

Aluminum Else

thus the ratio of iron content to the silicon content must be equal to or greater than one.

 

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FIELD: alloy metallurgy.

SUBSTANCE: invention relates to deformable, thermally strengthened, highly technologically effective, corrosion-resistant welding alloys based on the system Al-Mg-Si and articles made of thereof. The proposed alloy and article made of thereof comprise the following components, wt.-%: magnesium, 0.3-1.2; silicon, 0.3-1.7; manganese, 0.15-1.1; calcium, 0.05-0.; sodium, 0.0002-0.01, and at least one metal taken among the group comprising copper, iron, zirconium and chrome, 0.02-1.0, and aluminum, the balance. Invention provides the development of deformable alloy based on the system Al-Mg-Si and article made of this alloy that show enhanced technological effectiveness at cold stampings by extrusion and improved workability by cutting.

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3 cl, 3 tbl, 1 ex

FIELD: metallurgy of aluminum-based alloys on base of Al-Mg-Mn system for manufacture of armored semi-finished products and articles for aviation and shipbuilding and other civil equipment.

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3 cl, 1 dwg, 3 tbl, 3 ex

FIELD: nonferrous metallurgy.

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

3 cl, 3 tbl

FIELD: metallurgy.

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19 cl, 7 tbl, 1 dwg, 2 ex

FIELD: metallurgy; alloys.

SUBSTANCE: alloy and products out of this alloy contain the following elements, mas.% magnesium 0.6-1.2; silicon 0.6-1.2; manganese 0.3-1.0; iron 0.1-0.5; copper 0.05-1.0; titanium 0.005-0.05; at least one element out of the group: tin 0.6-1.0; bismuth 0.2-0.8; at least one element of the group: gallium 0.001-0.05; calcium 0.001-0.05; at least one element from the group: boron 0.0005-0.005; carbon 0.0001-0.005; aluminium - the rest.

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2 cl, 4 dwg, 2 tbl, 1 ex

FIELD: metallurgy.

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2 tbl, 1 ex

FIELD: metallurgy.

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

FIELD: metallurgy.

SUBSTANCE: Invention relates to metallurgy and may be sued in producing strained semi-finished products from thermally non-hardenable welded aluminium-based alloys used as structural and semiconductor material, primarily, in aerospace and nuclear engineering. Aluminium-base alloy comprises the following components in wt %: magnesium - 1.8-2.4, scandium - 0.2-0.4, zirconium - 0,1-0.2, cerium - 0.0001-0.005, iron - 0.01-0.15, silicon - 0.01-0.1, aluminium making the rest. Note here that iron-to-silicon content ratio may not be less than unity.

EFFECT: higher strength and conductivity, hence, reduced weight.

2 tbl, 1 ex

FIELD: metallurgy.

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 15-30C more than molten metal temperature, and vacuum treatment of molten metal in mixer is performed at temperature of 695-720C, during 45-90 minutes.

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2 cl, 3 tbl

FIELD: metallurgy.

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EFFECT: alloy has high strength properties and is intended for use in die casting and related methods.

8 cl, 1 tbl

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