Aviation aluminium alloy U-shaped frame section bar 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 its preparation, can solve problems such as uneven bending arcs, low production efficiency, and uneven manual processing areas, and achieve breakthroughs in precision bottlenecks, Good plane flatness, ensure the effect of stability and consistency

Active Publication Date: 2019-07-23
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 processi...

Method used

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  • Aviation aluminium alloy U-shaped frame section bar and preparation method thereof
  • Aviation aluminium alloy U-shaped frame section bar and preparation method thereof
  • Aviation aluminium alloy U-shaped frame section bar 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 aviation aluminium alloy U-shaped frame section bar and a preparation method thereof. The aviation aluminium alloy U-shaped frame section bar is prepared from the followingelements in percentage by weight: 5.6-6.5% of Zn, 1.4-2.4% of Cu, less than 0.1% of Mn, 1.8-2.6% of Mg, 0.2-0.25% of Cr, 0.25-0.35% of Fe, equal to or less than 0.1% of Si, less than 0.08% of Ti and the balance of Al. According to the preparation method, through the set alloy composition and the specific preparation technology including extruding, rolling and bending, the aviation aluminium alloyU-shaped frame section bar formed at one time is obtained, on one hand, the tensile strength and yield strength of U-shaped frame section bar are greatly improved, finally, the tensile strength can reach 550-609 MPa, the yield strength can reach 490-546 MPa, the elongation is 7-11%, the planar clearance is equal to or less than 1 mm, the perpendicularity is equal to or less than 1 degree, which are much better than the using standard, and on the other hand, the precision of the U-shaped frame section bar is greatly improved, the prepared U-shaped frame section bar has excellent planar flatnessto ensure stability consistency of quality, can completely meet the using requirement of aviation aluminium alloy section bar, and provides material guarantee for research of a novel spaceflight carrier rocket in China.

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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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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