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High-strength 2024 aluminum alloy thin-wall angle profile production process

A production process and aluminum alloy technology, which is applied in the field of aluminum alloy, can solve the problems of low yield and production efficiency, and achieve the effects of increasing yield, improving dimensional accuracy, and reducing profile deformation

Active Publication Date: 2017-03-22
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a production process for high-strength 2024 alum

Method used

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  • High-strength 2024 aluminum alloy thin-wall angle profile production process
  • High-strength 2024 aluminum alloy thin-wall angle profile production process
  • High-strength 2024 aluminum alloy thin-wall angle profile production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown in the production process flow, the production process of a high-strength 2024 aluminum alloy thin-walled corner profile provided by the present invention includes the following steps:

[0033] (1) Structure the mold, that is, add a diversion structure in the extrusion groove of the mold;

[0034] (2) Homogenize the cast rod, that is, the homogenization temperature is 485℃, and the time is 22h;

[0035] (3) Hot extrusion of the cast rod, that is, the homogenized cast rod is preheated to 410°C, 450°C and 445°C before extrusion, and the casting rod is preheated to 450°C and 445°C. The exit speed of the middle profile extrusion can be increased to 0.8m / min;

[0036] (4) The profile is stretched, that is, the profile after hot extrusion is clamped into the stretching device and stretched, and the stretch elongation is 1%;

[0037] (5) Quench and heat the profile, that is, send the stretched profile to the vertical quenching device and perform quenching heat...

Embodiment 2

[0044] The difference between this embodiment and embodiment 1 is that in step 2), the homogenization treatment temperature is 495°C, and the time is 28 hours; in step 3), the casting rod, the mold and the extrusion cylinder are respectively treated before extrusion. Preheat to 415°C, 455°C and 450°C, and during extrusion, the extrusion exit speed of the profile can be increased to 0.9m / min; in step 4), the tensile elongation is 1.2%; in step 5) In step 6), the quenching temperature is 465°C; in step 6), the tensile elongation is 0.4%; and immediately after shaping, and after the straightening is completed, the clamping parts at both ends of the profile are cut off, leaving the middle part. By adopting the above solution, the present invention can increase the extrusion efficiency of the angle profile to 0.9 m / min, and the degree of grain refinement is relatively high.

Embodiment 3

[0046] The difference between this embodiment and the above-mentioned embodiment is: in step 2), the homogenization treatment temperature is 490°C, and the time is 25h; in step 3), the casting rod, the mold and the extrusion cylinder are respectively treated before extrusion. Preheat to 420°C, 460°C and 460°C, and during extrusion, the extrusion exit speed of the profile can be increased to 1.0m / min; in step 4), the tensile elongation is 1.5%; in step 5) In step 6, the quenching temperature is 470°C; in step 6), the tensile elongation is 0.5%; and immediately after shaping, and after the straightening is completed, cut off the clamping parts at both ends of the profile, leaving the middle part; in step 7 ) Before, the profiles were also subjected to artificial aging treatment, that is, the stretched and straightened profiles were loaded into an aging furnace with a circulating hot air device and two-stage artificial aging was carried out. The temperature of the first stage was 2...

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Abstract

The invention discloses a high-strength 2024 aluminum alloy thin-wall angle profile production process, and belongs to the technical field of aluminum alloys. The process comprises the following steps: firstly, a mold is structurally treated; then, a cast rod is homogenized and thermally extruded; a profile is stretched, quenched, heated and straightened; and finally, the natural aging treatment is performed for the profile. The high-strength 2024 aluminum alloy thin-wall angle profile production process is mainly researched; through combination of mold optimal design, extrusion, stretching, heat treatment and the like, the improvement of the profile product yield and the production efficiency is finally realized; and profiles can replace foreign imported products.

Description

Technical field [0001] The invention belongs to the technical field of aluminum alloys, and specifically relates to a process for producing high-strength 2024 aluminum alloy thin-walled corner profiles. Background technique [0002] 2024 aluminum alloy is also known as high-strength duralumin. Its extruded profiles are mainly used in aircraft fuselage frames, wing stringers, wing ribs and other stressed structural parts. Most of the 2024 aluminum alloy extruded angle profiles are imported. There are only a few companies in China that can produce, but there are still many problems. The main manifestations are: (1) 2024 aluminum alloy has higher strength, greater resistance to extrusion deformation, difficult to extrusion, poor products, and difficult to guarantee dimensional tolerances (2) Extrusion efficiency of the profile is too low; (3) The deformation and resilience of the profile after vertical quenching are large, which makes it difficult to reshape, and the yield rate is a...

Claims

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Application Information

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IPC IPC(8): B21C29/04B21C29/00B21C25/02B21C23/14B21D3/12C22F1/04
CPCB21C23/14B21C25/02B21C29/003B21C29/04B21D3/12C22F1/002C22F1/04
Inventor 王彦俊盖洪涛李洪林徐鑫刘丽
Owner CHINA ZHONGWANG
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