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Production process of ultrathin-wall aluminum alloy section for aviation

An aluminum alloy profile and production process technology, which is applied in the production process field of aluminum alloy profiles, can solve the problems of extrusion and heat treatment deformation of ultra-thin aluminum alloy profiles, and achieve the effects of reducing quenching deformation, uniform cooling speed and improving product quality.

Inactive Publication Date: 2014-12-10
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a production process of ultra-thin aluminum alloy profiles for aviation, to solve the problem of extrusion and heat treatment deformation of ultra-thin aluminum alloy profiles

Method used

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  • Production process of ultrathin-wall aluminum alloy section for aviation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: The production process of ultra-thin-walled aluminum alloy profiles for aviation in this embodiment includes the following steps:

[0017] 1) Before extrusion: heat the aluminum alloy cast rod at a temperature of 400°C; heat the extrusion die at a temperature of 430°C; heat the extrusion cylinder at a temperature of 390°C; In terms of mass percentage, the composition of the aluminum alloy casting rod is: Si: ≤0.5%; Fe: ≤0.5%; Cu: 3.9%-4.9%; Mg: 1.2%-1.8%; Mn: 0.3%-0.9% ; Cr: ≤0.1%; Zn: ≤0.25%; Ti: ≤0.15%; Al: balance;

[0018] 2) Profile extrusion: the extrusion speed is controlled at ≤0.1m / min;

[0019] 3) Straightening: Fix the two ends of the extruded profile 1 on the hydraulic stretching machine through the clamp 2, and then start the hydraulic stretching and straightening machine to stretch and straighten the profile; Fixture holes matching the external shape, and the end of the profile is clamped and fixed in the fixture holes;

[0020] 4) Carry o...

Embodiment 2

[0026] Embodiment 2: The production process of ultra-thin-walled aluminum alloy profiles for aviation in this embodiment includes the following steps:

[0027] Before extrusion: heat the aluminum alloy cast rod at a temperature of 405°C; heat the extrusion die at a temperature of 435°C; heat the extrusion cylinder at a temperature of 397°C; by mass percentage In other words, the composition of the aluminum alloy cast rod is: Si: ≤0.5%; Fe: ≤0.5%; Cu: 3.9%-4.9%; Mg: 1.2%-1.8%; Mn: 0.3%-0.9%; Cr : ≤0.1%; Zn: ≤0.25%; Ti: ≤0.15%; Al: balance;

[0028] 2) Profile extrusion: the extrusion speed is controlled at ≤0.1m / min;

[0029] 3) Straightening: Fix the two ends of the extruded profile 1 on the hydraulic stretching machine through the clamp 2, and then start the hydraulic stretching and straightening machine to stretch and straighten the profile; Fixture holes matching the external shape, and the end of the profile is clamped and fixed in the fixture holes;

[0030] 4) Carry o...

Embodiment 3

[0036] Embodiment 3: The production process of ultra-thin-walled aluminum alloy profiles for aviation in this embodiment includes the following steps:

[0037] Before extrusion: heat the aluminum alloy cast rod at a temperature of 410°C; heat the extrusion die at a temperature of 440°C; heat the extrusion cylinder at a temperature of 405°C; by mass percentage In other words, the composition of the aluminum alloy cast rod is: Si: ≤0.5%; Fe: ≤0.5%; Cu: 3.9%-4.9%; Mg: 1.2%-1.8%; Mn: 0.3%-0.9%; Cr : ≤0.1%; Zn: ≤0.25%; Ti: ≤0.15%; Al: balance;

[0038] 2) Profile extrusion: the extrusion speed is controlled at ≤0.1m / min;

[0039] 3) Straightening: Fix the two ends of the extruded profile 1 on the hydraulic stretching machine through the clamp 2, and then start the hydraulic stretching and straightening machine to stretch and straighten the profile; Fixture holes matching the external shape, and the end of the profile is clamped and fixed in the fixture holes;

[0040] 4) Carry o...

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Abstract

The invention discloses a production process of an ultrathin-wall aluminum alloy section for aviation. The production process comprises the following steps: 1) before extrusion, heating an aluminum alloy casting rod, an extrusion mold and an extrusion container; 2) extruding the section; 3) straightening; 4) carrying out sizing sawing on the straightened section; 5) heat treatment. According to the production process, the aluminum rod, the extrusion mold and the extrusion container are preheated before extrusion, so that the temperature of the section in the extrusion process can be kept stable, the mass defects of the section caused by an over-cold or over-heat condition are avoided, meanwhile, the end part of the section is completely wrapped and fixed by a clamp hole in the stretching and straightening processes, the contact area of the section and a clamp is large, the problem of rupture in the end part of the section in the stretching and straightening processes can be avoided, vertical quenching is carried out on the section by adopting quenching liquid of which the concentration is 8-10% and the temperature is 25-30 DEG C in the production process, the cooling speeds of various parts of the section are uniform, the quenching deformation can be greatly reduced, and the product quality is improved.

Description

technical field [0001] The invention relates to a production process, in particular to a production process of an aluminum alloy profile. Background technique [0002] For thin-walled aluminum alloy profiles for aviation, especially those with a wall thickness of less than 1.3mm, extrusion and heat treatment processes are very important. [0003] In the prior art, for this type of material, because the overall wall thickness is too thin, not only the requirements for extrusion technology are high, but also the deformation is serious when using traditional water quenching regardless of on-line or off-line quenching after extrusion. Contents of the invention [0004] In view of this, the object of the present invention is to provide a production process of ultra-thin-wall aluminum alloy profiles for aviation to solve the problems of extrusion and heat treatment deformation of ultra-thin aluminum alloy profiles. [0005] The production process of the ultra-thin-walled alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/057C22C21/18C22C21/16
Inventor 李洪林刘兆伟柳禹含杜细亚
Owner CHINA ZHONGWANG
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