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A kind of aluminum alloy section material and preparation method thereof

A technology of aluminum alloy profiles and large aircraft, which is applied in the field of aluminum alloy profiles and its preparation for the lower wall panels and long stringers of large aircraft wings, to achieve good fracture toughness, increase strength, and reduce recrystallization layers

Active Publication Date: 2021-07-02
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

In recent years, China's civil aviation manufacturing industry has developed rapidly. However, due to the special conditions of use of the lower panel girders of large aircraft wings, the requirements for material strength, toughness, fatigue resistance, creep resistance, corrosion resistance and service life are extremely high. The aluminum alloy material suitable for the lower panel stringer of the wing of a large aircraft is still blank, and usually needs to be imported

Method used

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  • A kind of aluminum alloy section material and preparation method thereof
  • A kind of aluminum alloy section material and preparation method thereof
  • A kind of aluminum alloy section material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A large aircraft wing, a long-disc herbal profile, is composed of elements of the following weight percentage: Cu3.6%, MN0.3%, Mg1.6%, Zn0.08%, Ti0.05%, Zr0 .13%, Fe0.05%, Si0.02%, margin is Al.

[0033] When the large aircraft wing is prepared by aluminum alloy profiles, including the following steps:

[0034] (1) Selection of high-purity aluminum ingots, purity ≥99.996%, magnesium ingot, Mn additive and electrolytic copper, Al-2zr alloy, Al-Ti-B, Al-Ti-B The Mn content in the Mn additive is 80% (mass percent), the flux content is 20% (mass percent), and the electrolytic copper is No. 1 or 2 electrolytic copper.

[0035] (2) The above-mentioned high-pure aluminum ingot, magnesium ingot and electrolytic copper are put into a smelting furnace melting furnace of 700-750 ° C, and Al-10 mN intermediate alloy is added to the melting temperature of 710 ° C, Al-2ZR alloy And Al-Ti-B, the Mn additive is added to the melting temperature of 730 ° C; where the smelting furnace is prod...

Embodiment 2

[0062] An aluminum alloy profile for large aircraft wing under a large aircraft wing, consisting of elements of the following weight percentage: Cu4.3%, MN0.8%, Mg1.0%, Zn0.10%, Ti0.01%, Zr0 .05%, Fe0.07%, Si0.01%, margin is Al.

[0063] When the large aircraft wing is prepared by aluminum alloy profiles, including the following steps:

[0064] (1) Selection of high-purity aluminum ingots, purity ≥99.996%, magnesium ingot, Mn additive and electrolytic copper, Al-2zr alloy, Al-Ti-B, Al-Ti-B The Mn content in the Mn additive is 80.5% (mass percentage), the flux content is 19.5% (mass percent), and the electrolytic copper is No. 1 or 2 electrolytic copper.

[0065] (2) The above-mentioned high-pure aluminum ingot, magnesium ingot and electrolytic copper are put into a smelting furnace melting furnace of 700-750 ° C, and Al-10 mN intermediate alloy is added to the melting temperature of 710 ° C, Al-2ZR alloy And Al-Ti-B, the Mn additive is added to the melting temperature of 730 ° C; ...

Embodiment 3

[0084] A large aircraft wing, a long-disc herbal profile, is composed of elements of the following weight percentage: Cu4.0%, MN0.5%, Mg1.3%, Zn0.01%, Ti06%, Zr0 . 25%, Fe0.02%, Si0.05%, and margin is Al.

[0085] When the large aircraft wing is prepared by aluminum alloy profiles, including the following steps:

[0086] (1) Selection of high-purity aluminum ingots, purity ≥99.996%, magnesium ingot, Mn additive and electrolytic copper, Al-2zr alloy, Al-Ti-B, Al-Ti-B The Mn content in the Mn additive is 79.5% (mass percent), the flux content is 21.5% (mass percent), and the electrolytic copper is No. 1 or 2 electrolytic copper.

[0087] (2) The above-mentioned high-pure aluminum ingot, magnesium ingot and electrolytic copper are put into a smelting furnace melting furnace of 700-750 ° C, and Al-10 mN intermediate alloy is added to the melting temperature of 710 ° C, Al-2ZR alloy And Al-Ti-B, the Mn additive is added to the melting temperature of 730 ° C; where the smelting furnace ...

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Abstract

The invention discloses an aluminum alloy section material for the long truss of the lower wall panel of a large aircraft wing and a preparation method thereof. Through the process research such as melt purification treatment, smelting casting, reverse extrusion, heat treatment strengthening, and elimination of internal stress of the aluminum material, Improve the strength, fatigue resistance, stress corrosion resistance and fracture toughness of aluminum alloy profiles, and its longitudinal mechanical properties: tensile strength not less than 538MPa, non-proportional elongation strength not less than 413MPa, elongation after fracture not less than 13.2%; transverse direction Mechanical properties: the tensile strength is not less than 492MPa, the non-proportional elongation strength is not less than 382MPa, the elongation after fracture is not less than 9.5%, and the minimum tensile strength is 8.5% higher in the longitudinal direction and 8.1% higher in the transverse direction than imported materials. The coarse-grained "recrystallized layer" on the surface is reduced, and its performance is superior to that of imported materials. It can meet the requirements of the strength, toughness, fatigue resistance, creep resistance, corrosion resistance and service life of the materials used for the lower wall panels and stringers of large aircraft wings. After testing, all the indicators meet or exceed the requirements of the AMS 4338A standard.

Description

Technical field [0001] The present invention belongs to the field of aluminum alloy profile processing, and more particularly to aluminum alloy profiles for long-hail of large aircraft wings and methods of preparation thereof. Background technique [0002] Modern civil aircraft continues to develop in large, high-speed, long life, high flight safety and low cost direction, the United States first through the control of ingredients on the 2024 alloy, has developed a new generation of high-strength, high loss injury to 2026 alloy, 2026 aluminum As the key structure material of large aircraft, alloy profiles has been used as the preferred aluminum alloy material for large pastel wings. In recent years, China's civil aviation manufacturing has developed rapidly, but due to the special conditions for the use of large aircraft wings, the requirements of material strength, toughness, anti-fatigue, antigen, corrosion resistance, and service life are extremely high, my country Aluminum al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/14C22C21/16C22C21/18C22C1/03C22F1/057B23P15/00
CPCB23P15/00C22C1/026C22C1/03C22C21/14C22C21/16C22C21/18C22F1/057
Inventor 章伟黄嵘李东林茂李红萍李维忠阎维刚史恒周霞张秋锦张世通魏新民刘旭明吴昕萍马步云刘海生陈小霞杨凤琦王军社
Owner 西北铝业有限责任公司
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