Aluminum alloy variable section extruded profile for spaceflight and preparation method of aluminum alloy variable section extruded profile

A technology for extruding profiles and aluminum alloys, which is applied in the field of aerospace aluminum alloy extruded profiles with variable cross-section and its preparation, can solve the problems of low strength and stress concentration in the connection area, and achieves the improvement of strength, and the reduction of crystallization and intragranular potential. The effect of poor and good use value and application prospect

Active Publication Date: 2019-08-16
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 variable cross-section profiles used in domestic launchers are mainly formed by welding and machining, and there are situations such as stress concentration in the connection area and lower strength than the base metal.

Method used

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  • Aluminum alloy variable section extruded profile for spaceflight and preparation method of aluminum alloy variable section extruded profile
  • Aluminum alloy variable section extruded profile for spaceflight and preparation method of aluminum alloy variable section extruded profile
  • Aluminum alloy variable section extruded profile for spaceflight and preparation method of aluminum alloy variable section extruded profile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] An aluminum alloy variable-section extruded profile for aerospace, which is composed of the following elements by weight percentage: Zn 5.0%, Cu2.0%, Mn 0.04%, Mg3.0%, Cr0.15%, Fe0.42%, Si≤0.25%, the remainder is Al.

[0037] The preparation method of the aerospace aluminum alloy multi-section extruded profile comprises the following steps:

[0038] (1) According to the element composition, select remelted aluminum ingots with a grade of ≥99.80%, zinc ingots with a purity of ≥99.90%, magnesium ingots with a purity of ≥99.95%, electrolytic copper plates with a purity of 99.99%, Al-4Cr alloy, Al-10Mn alloy, Al-10Fe alloy was used as the raw material.

[0039] (2) Use a resistance reverberatory furnace to melt the remelted aluminum ingot, Al-4Cr alloy, Al-10Mn alloy, and Al-10Fe alloy at 710 °C. After melting, add zinc ingot, magnesium ingot and electrolytic copper plate to the melt, stir and melt into an aluminum alloy melt.

[0040] (3) Use the nitrogen-chlorine mixed...

Embodiment 2

[0050] An aluminum alloy variable-section extruded profile for aerospace, which is composed of the following elements by weight percentage: Zn 6.0%, Cu1.0%, Mn 0.1%, Mg2.0%, Cr0.25%, Fe0.35%, Si≤0.25%, the remainder is Al.

[0051] The preparation method of the aerospace aluminum alloy multi-section extruded profile comprises the following steps:

[0052] (1) According to the element composition, select remelted aluminum ingots with a grade of ≥99.80%, zinc ingots with a purity of ≥99.90%, magnesium ingots with a purity of ≥99.95%, electrolytic copper plates with a purity of 99.99%, Al-4Cr alloy, Al-10Mn alloy, Al-10Fe alloy was used as the raw material.

[0053] (2) Use a resistance reverberatory furnace to melt the remelted aluminum ingot, Al-4Cr alloy, Al-10Mn alloy, and Al-10Fe alloy at 750 °C. After melting, add zinc ingot, magnesium ingot and electrolytic copper plate to the melt, stir and melt into an aluminum alloy melt.

[0054] (3) Use the nitrogen-chlorine mixed ...

Embodiment 3

[0064] An aluminum alloy variable-section extruded profile for aerospace, which is composed of the following elements by weight percentage: Zn 6.0%, Cu2.0%, Mn 0.04%, Mg2.0%, Cr0.20%, Fe0.40%, Si≤0.25%, the remainder is Al.

[0065] The preparation method of the aerospace aluminum alloy multi-section extruded profile comprises the following steps:

[0066] (1) According to the element composition, select remelted aluminum ingots with a grade of ≥99.80%, zinc ingots with a purity of ≥99.90%, magnesium ingots with a purity of ≥99.95%, electrolytic copper plates with a purity of 99.99%, Al-4Cr alloy, Al-10Mn alloy, Al-10Fe alloy was used as the raw material.

[0067] (2) Use a resistance reverberatory furnace to melt the remelted aluminum ingot, Al-4Cr alloy, Al-10Mn alloy, and Al-10Fe alloy at 730 °C. After melting, add zinc ingot, magnesium ingot and electrolytic copper plate to the melt, stir and melt into an aluminum alloy melt.

[0068] (3) Use the nitrogen-chlorine mixed...

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Abstract

The invention discloses an aluminum alloy variable section extruded profile for spaceflight and a preparation method of the aluminum alloy variable section extruded profile. The profile consists of the following elements of, in percentage by weight, 5.0%-6.0% of Zn, 1.0%-2.0% of Cu, 0.04%-0.1% of Mn, 2.0%-3.0% of Mg, 0.15%-0.25% of Cr, 0.35%-0.42% of Fe, less than or equal to 0.25% of Si, and thebalance Al. During preparation, a finished product is obtained after being subjected to smelting, purifying, standing, casting, homogenizing treatment, ingot heating, extrusion, pre-finishing, solution treatment, straightening finishing, deep machining, aging treatment and fine adjustment treatment. According to the method, by setting specific alloy composition and the preparation process, the aluminum alloy variable section extruded profile formed by once is obtained, the strength, fatigue resistance, corrosion resistance and stress corrosion resistance of the aluminum alloy profile are greatly improved, comprehensive performance requirements of a carrier rocket launcher on the variable section aluminum alloy profile can be met, the bottleneck of extrusion forming of the variable sectionprofile at present is broken, various indexes of the aluminum alloy profile are ensured to meet standards and use requirements, and material guarantee is provided for research of new carrier rockets 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 multi-section extruded profile for aerospace and a preparation method thereof. Background technique [0002] The launch vehicle is the guarantee for the rapid deployment, reconstruction, expansion and maintenance of spacecraft, an important carrier for the large-scale development and utilization of space resources, and an important driving force for the development of the national economy. At present, the multi-section profiles used in domestic launchers are mainly formed by welding and machining, and there are situations such as stress concentration in the connection area and lower strength than the base metal. In order to improve the bearing capacity, safety and service life of the load-bearing parts of the launch frame, the aluminum alloy multi-section profiles are required to be formed at one time, and have higher streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053B21C37/00
CPCB21C37/00C22C1/026C22C1/03C22C21/10C22F1/053
Inventor 章伟魏新民赵蛟龙李维忠赵育宏田建强张世通周霞陈小霞刘旭明
Owner 西北铝业有限责任公司
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