Alloy for aircraft fuselage

An aircraft fuselage and alloy technology, applied in the field of aluminum-based alloys, can solve the problems of the aircraft fuselage skin's poor resistance to magnetic fields and rays, difficult to precisely control operating parameters, and poor aircraft fuselage hardness. Performance and performance, uniform distribution of chemical components, the effect of increasing compression and impact resistance

Active Publication Date: 2017-08-25
HUIAN TAIDA TRADING CO LTD
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AI Technical Summary

Problems solved by technology

[0005] The Chinese patent application number 200680047951.8 discloses a high-toughness aluminum-copper-lithium plate for aircraft fuselage, which has high strength, high toughness and high corrosion resistance, and contains: 2.1~2.8% by weight of Cu, 1.1~ 1.7% by weight of Li, 0.1 to 0.8% by weight of Ag, 0.2 to 0.6% by weight of Mg, 0.2 to 0.6% by weight of Mn, the contents of Fe and Si are all less than or equal to 0.1% by weight, each inevitable impurity content Less than or equal to 0.05% by weight, the total content of impurities is less than or equal to 0.15% by weight, the alloy basically does not contain zirconium; however, the preparation process is complicated, the operating parameters are difficult to accurately control, and the hardness of the prepared aircraft fuselage is not good
[0006] Chinese patent application number 201010146337.5 discloses a skin panel for an aircraft fuselage, the skin panel includes a skin structure connected to at least one metal reinforcement element, the skin structure includes Contiguous polymer-based, carbon fiber-reinforced skin members, wherein the metal reinforcement elements are made of an Al-Mg alloy containing 3.5% to 7% Mg and preferably also at least 0.05% to 1.5% Sc ; However, the aircraft fuselage skin prepared by this method has poor ability to resist magnetic field and radiation

Method used

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  • Alloy for aircraft fuselage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of alloy for aircraft fuselage, its raw material composition comprises:

[0032] Sc 0.04%, Mn 1.0%, Ti 0.03%, Li 0.03%, Sn 0.11%, Cu 0.24%, Ni 10.0%, Cr 0.20%, Y 0.027%, La 0.16%, Tb is 0.014%, Dy is 0.016%, Ho is 0.29%, Eu is 0.014%, Er is 1.5%, Zn is 0.38%, Pb is 0.20%, and the rest is Al.

[0033] Its preparation method comprises the following steps:

[0034] Step S01: Li, Sn, Pb, Al are heated to 670° C. at a heating rate of 170° C. / min, and melted for 23 minutes.

[0035] Step S02: Add Zn to the molten metal in step S01 under the liquid surface without contacting with the air. After fully melting, stir and keep warm for 23 minutes, and cool down to room temperature at a cooling rate of 170°C / min to obtain a rough alloy embryo .

[0036] Step S03: Heat Sc, Mn, Ti, Cu, Ni, Cr, Y, La, Tb, Dy, Ho, Eu, Er at a heating rate of 170°C / min to 1910°C to melt, and add the rough alloy embryo after vacuuming , after each component is fully melted, it is cooled to roo...

Embodiment 2

[0041] A kind of alloy for aircraft fuselage, its raw material composition comprises:

[0042] Sc 0.01%, Mn 0.06%, Ti 0.03%, Li 0.01%, Sn 0.05%, Cu 0.21%, Ni 9.0%, Cr 0.18%, Y 0.01%, La 0.10%, Tb is 0.01%, Dy is 0.01%, Ho is 0.20%, Eu is 0.01%, Er is 0.50%, Zn is 0.31%, Pb is 0.10%, and the rest is Al.

[0043] Its preparation method comprises the following steps:

[0044] Step S01: Li, Sn, Pb, and Al are heated to 660° C. at a heating rate of 150° C. / min, and melted for 20 minutes.

[0045] Step S02: Add Zn under the molten metal liquid surface in step S01 without contacting with air. After fully melting, stir and keep warm for 20 minutes, and cool down to room temperature at a cooling rate of 150°C / min to obtain a rough alloy embryo .

[0046] Step S03: Heat Sc, Mn, Ti, Cu, Ni, Cr, Y, La, Tb, Dy, Ho, Eu, Er at a heating rate of 150°C / min to 1900°C to melt, and add the rough alloy embryo after vacuuming , after the components are fully melted, the temperature is lowered t...

Embodiment 3

[0051] A kind of alloy for aircraft fuselage, its raw material composition comprises:

[0052] Sc 0.08%, Mn 1.5%, Ti 0.04%, Li 0.04%, Sn 0.15%, Cu 0.20%, Ni 11.9%, Cr 0.21%, Y 0.03%, La 0.20%, Tb is 0.02%, Dy is 0.01%, Ho is 0.30%, Eu is 0.03%, Er is 3.0%, Zn is 0.42%, Pb is 0.50%, and the rest is Al.

[0053] Its preparation method comprises the following steps:

[0054] Step S01: Li, Sn, Pb, and Al are heated to 685° C. at a heating rate of 200° C. / min, and melted for 30 minutes.

[0055] Step S02: Add Zn to the molten metal in step S01 under the liquid surface without contact with air. After fully melting, stir and keep warm for 30 minutes, and cool down to room temperature at a cooling rate of 200°C / min to obtain a rough alloy embryo .

[0056] Step S03: Heat Sc, Mn, Ti, Cu, Ni, Cr, Y, La, Tb, Dy, Ho, Eu, Er at a heating rate of 200°C / min to 1950°C to melt, and add the rough alloy embryo after vacuuming , after the components are fully melted, the temperature is lowere...

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Abstract

The invention provides a fuselage alloy which comprises 0.01-0.08% of Sc, 0.06-1.5% of Mn, 0.03-0.04% of Ti, 0.01-0.04% of Li, 0.05-0.15% of Sn, 0.21-0.30% of Cu, 9.0-12.0% of Ni, 0.18-0.21% of Cr, 0.01-0.03% of Y, 0.10-0.20% of La, 0.01-0.02% of Tb, 0.01-0.02% of Dy, 0.20-0.30% of Ho, 0.01-0.03% of Eu, 0.50-3.0% of Er, 0.31-0.42% of Zn, 0.10-0.50% of Pb and the balance of Al. Since rare earth elements are added into the prepared alloy material, in the case of same force bearing, the weight of structural parts is obviously reduced, the corrosion resistance is good, and the hardness is high.

Description

technical field [0001] The invention belongs to the field of aluminum-based alloys, and in particular relates to an alloy for an aircraft fuselage. Background technique [0002] The main concepts related to the aircraft industry include aircraft, aircraft, and civil aircraft. Any object made by man that can fly off the ground and fly in space controlled by man is called an aircraft, and an aircraft that flies in the atmosphere is called an aircraft. Civil aircraft refers to aircraft other than those used for military, customs and police flight missions. The 21st century is the century of rapid development of the aircraft manufacturing industry and the transportation industry. With the gradual deepening of my country's economic reform, the national economy has entered the third step of strategic development, and the demand for aircraft products has entered the fast lane. The development of my country's aircraft industry has created excellent opportunities. The aircraft manu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22F1/04
CPCC22C21/00C22F1/04
Inventor 王少平
Owner HUIAN TAIDA TRADING CO LTD
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