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A kind of aluminum alloy U-shaped frame profile for aerospace and preparation method thereof

An aluminum alloy and U-shaped technology, which is applied in the field of aerospace aluminum alloy U-shaped frame profiles and their preparation, can solve the problems of uneven manual processing area, uneven bending radian, low production efficiency, etc., and achieve strong practical strengthening effect. , Improve the accuracy and the effect of good plane flatness

Active Publication Date: 2021-02-26
西北铝业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the U-shaped frame profiles used in domestic launchers are mainly formed by mold stretching and manual processing by personnel. There are problems such as uneven stretching arcs, uneven manual processing areas, and low production efficiency.

Method used

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  • A kind of aluminum alloy U-shaped frame profile for aerospace and preparation method thereof
  • A kind of aluminum alloy U-shaped frame profile for aerospace and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An aluminum alloy U-shaped frame profile for aerospace, which is composed of the following elements in weight percentage: Zn5.6%, Cu2.4%, Mn<0.1%, Mg1.8%, Cr0.25%, Fe0.25%, Si≤0.1%, Ti<0.08%, and the balance is Al.

[0029] The preparation method of the aluminum alloy U-shaped frame profile for aerospace comprises the following steps:

[0030] (1) Select remelted aluminum ingots, zinc ingots, magnesium ingots, electrolytic copper plates, Al-4Cr alloys, and Al-10Fe alloys with a grade ≥99.85% as raw materials according to the composition of elements;

[0031] (2) Use a resistance reverberatory furnace to melt remelted aluminum ingots, Al-4Cr alloys, and Al-10Fe alloys at 700 ° C. After melting, add zinc ingots, magnesium ingots and electrolytic copper plates into the melt, and stir and melt to form an alloy melt;

[0032] (3) Use nitrogen-chlorine mixed gas blowing method to purify the melt, and the ratio of nitrogen-chlorine mixed gas is N 2 =84%, Cl 2 =16%, blowing ...

Embodiment 2

[0040] An aluminum alloy U-shaped frame profile for aerospace, which is composed of the following elements in weight percentage: Zn6.0%, Cu2.0%, Mn<0.1%, Mg2.2%, Cr0.22%, Fe0.30%, Si≤0.1%, Ti<0.08%, and the balance is Al.

[0041] The preparation method of the aluminum alloy U-shaped frame profile for aerospace comprises the following steps:

[0042] (1) Select remelted aluminum ingots, zinc ingots, magnesium ingots, electrolytic copper plates, Al-4Cr alloys, and Al-10Fe alloys with a grade ≥99.85% as raw materials according to the composition of elements;

[0043] (2) Use a resistance reverberatory furnace to melt remelted aluminum ingots, Al-4Cr alloys, and Al-10Fe alloys at 760 ° C. After melting, add zinc ingots, magnesium ingots and electrolytic copper plates into the melt, and stir and melt to form an alloy melt;

[0044] (3) Use nitrogen-chlorine mixed gas blowing method to purify the melt, and the ratio of nitrogen-chlorine mixed gas is N 2 =84%, Cl 2 =16%, blowing ...

Embodiment 3

[0052] An aluminum alloy U-shaped frame profile for aerospace, which is composed of the following elements in weight percentage: Zn6.5%, Cu1.4%, Mn<0.1%, Mg2.6%, Cr0.2%, Fe0.35%, Si≤0.1%, Ti<0.08%, and the balance is Al.

[0053] The preparation method of the aluminum alloy U-shaped frame profile for aerospace comprises the following steps:

[0054] (1) Select remelted aluminum ingots, zinc ingots, magnesium ingots, electrolytic copper plates, Al-4Cr alloys, and Al-10Fe alloys with a grade ≥99.85% as raw materials according to the composition of elements;

[0055] (2) Use a resistance reverberatory furnace to melt remelted aluminum ingots, Al-4Cr alloys, and Al-10Fe alloys at 730°C. After melting, add zinc ingots, magnesium ingots, and electrolytic copper plates into the melt, and stir and melt to form an alloy melt;

[0056] (3) Use nitrogen-chlorine mixed gas blowing method to purify the melt, and the ratio of nitrogen-chlorine mixed gas is N 2 =84%, Cl 2 =16%, the blowin...

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Abstract

The invention discloses an aerospace aluminum alloy U-shaped frame profile and a preparation method thereof. The U-shaped frame profile is composed of the following elements by weight percentage: Zn5.6-6.5%, Cu1.4-2.4%, Mn<0.1 %, Mg1.8‑2.6%, Cr0.2‑0.25%, Fe0.25‑0.35%, Si≤0.1%, Ti<0.08%, and the balance is Al. By setting a specific alloy composition and a specific preparation process such as extrusion and rolling, the invention obtains a U-shaped frame profile of an aerospace aluminum alloy that is formed at one time. On the one hand, the tensile strength and yield strength of the U-shaped frame profile are greatly improved, The final tensile strength can reach 550-609Mpa, the yield strength can reach 490-546Mpa, the elongation rate can reach 7-11%, the plane gap is less than or equal to 1mm, and the verticality is less than or equal to 1°, which is far better than the use standard. On the other hand, the precision of the U-shaped frame profile is greatly improved. The prepared U-shaped frame profile has a good plane flatness, which ensures the stability and consistency of the quality, and can fully meet the use requirements of aerospace aluminum alloy profiles. Research on new launch vehicles provides material support.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy profile processing, and in particular relates to an aluminum alloy U-shaped frame profile for aerospace and a preparation method thereof. Background technique [0002] The launch vehicle is the guarantee for the rapid deployment, reconfiguration, expansion and maintenance of spacecraft, an important carrier for large-scale development and utilization of space resources, and an important driving force for national economic development. At present, the U-shaped frame profiles used in domestic launchers are mainly formed by mold stretch bending and manual processing by personnel. There are problems such as uneven stretch bending arcs, uneven manual processing areas, and low production efficiency. In order to improve the processing efficiency, bearing capacity, safety and service life of the launch frame, it is required that the U-shaped frame profile for aluminum alloy aerospace should be form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053B21C37/00
CPCB21C37/00C22C1/026C22C1/03C22C21/10C22F1/053
Inventor 李旺顺赵蛟龙章伟魏新民林茂刘津海边永奇王军社丁文杨旺成黄嵘王守业赵锦辉
Owner 西北铝业有限责任公司
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