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A kind of extrusion profile of aluminum alloy with multiple variable cross-sections for aerospace and its preparation method

A technology for extruding profiles and aluminum alloys, which is applied in the field of aerospace aluminum alloy extruded profiles with variable cross-sections and their preparation, can solve the problems of stress concentration and low strength in the connection area, and achieves improved strength, increased hardness, and reduced crystallization and crystallization. Effect of Intracrystalline Potential Difference

Active Publication Date: 2021-06-01
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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  • A kind of extrusion profile of aluminum alloy with multiple variable cross-sections for aerospace and its preparation method
  • A kind of extrusion profile of aluminum alloy with multiple variable cross-sections for aerospace and its preparation method
  • A kind of extrusion profile of aluminum alloy with multiple variable cross-sections for aerospace and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] An aluminum alloy multi-section extruded profile for aerospace, which is composed of the following elements by weight percentage: Zn5.0%, Cu2.0%, Mn0.04%, Mg3.0%, Cr0.15%, Fe0.42% , Si≤0.25%, and the balance is Al.

[0037] The preparation method of the aluminum alloy extruded profiles with variable cross-sections for aerospace comprises the following steps:

[0038] (1) Select remelted aluminum ingots with grade ≥99.80%, zinc ingots with purity ≥99.90%, magnesium ingots with purity ≥99.95%, electrolytic copper plates with purity 99.99%, Al-4Cr alloy, Al-10Mn alloy, Al-10Fe alloy is used as raw material.

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

[0040] (3) Use nitrogen-chlorine mixed gas blowing method to purify the melt, a...

Embodiment 2

[0050] An aluminum alloy variable cross-section extruded profile for aerospace, which is composed of the following elements in weight percentage: Zn6.0%, Cu1.0%, Mn0.1%, Mg2.0%, Cr0.25%, Fe0.35% , Si≤0.25%, and the balance is Al.

[0051] The preparation method of the aluminum alloy extruded profiles with variable cross-sections for aerospace comprises the following steps:

[0052] (1) Select remelted aluminum ingots with grade ≥99.80%, zinc ingots with purity ≥99.90%, magnesium ingots with purity ≥99.95%, electrolytic copper plates with purity 99.99%, Al-4Cr alloy, Al-10Mn alloy, Al-10Fe alloy is used as raw material.

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

[0054] (3) Use nitrogen-chlorine mixed gas blowing method to purify the ...

Embodiment 3

[0064] An aluminum alloy variable cross-section extruded profile for aerospace, composed of the following elements by weight percentage: Zn6.0%, Cu2.0%, Mn0.04%, Mg2.0%, Cr0.20%, Fe0.40% , Si≤0.25%, and the balance is Al.

[0065] The preparation method of the aluminum alloy extruded profiles with variable cross-sections for aerospace comprises the following steps:

[0066] (1) Select remelted aluminum ingots with grade ≥99.80%, zinc ingots with purity ≥99.90%, magnesium ingots with purity ≥99.95%, electrolytic copper plates with purity 99.99%, Al-4Cr alloy, Al-10Mn alloy, Al-10Fe alloy is used as raw material.

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

[0068] (3) Use nitrogen-chlorine mixed gas blowing method to purify the melt, a...

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Abstract

The invention discloses an aluminum alloy multi-variable cross-section extrusion profile for aerospace and a preparation method thereof. The profile is composed of the following elements in weight percent: Zn 5.0-6.0%, Cu1.0-2.0%, Mn 0.04-0.1% , Mg2.0‑3.0%, Cr0.15‑0.25%, Fe0.35‑0.42%, Si≤0.25%, and the balance is Al. The finished product is obtained after smelting, purification and standing, casting, homogenization treatment, ingot heating, extrusion, pre-finishing, solution treatment, straightening and finishing, deep processing, aging treatment and fine-tuning treatment during preparation. In the present invention, by setting a specific alloy composition and its preparation process, a one-time formed aluminum alloy multi-section extruded profile is obtained, which greatly improves the strength, fatigue resistance toughness, corrosion resistance and stress corrosion resistance of the aluminum alloy profile. It can meet the comprehensive performance requirements of the carrier rocket launcher for multi-section aluminum alloy profiles, break through the current bottleneck of extrusion molding of multi-section profiles, and ensure that its various indicators meet the standards and use requirements. Material guarantee is provided.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy profile processing, and in particular relates to an aluminum alloy extruded profile with variable cross-section 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 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. In order to improve the load-bearing capacity, safety and service life of the load-bearing parts of the launcher, it is required that the aluminum alloy variable cross-section profile should be formed at on...

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 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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