A production process of high-strength 2024 aluminum alloy thin-walled corner profiles

A production process and technology for aluminum alloys, applied in the field of aluminum alloys, can solve problems such as low yield and production efficiency, and achieve the effects of improving yield, reducing extrusion resistance, and reducing difficulty

Active Publication Date: 2018-05-04
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 aluminum alloy thin-walled corner profiles to solve the problems of low yield and production efficiency of the profile products

Method used

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  • A production process of high-strength 2024 aluminum alloy thin-walled corner profiles
  • A production process of high-strength 2024 aluminum alloy thin-walled corner profiles
  • A production process of high-strength 2024 aluminum alloy thin-walled corner profiles

Examples

Experimental program
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Embodiment 1

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

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

[0034] (2) Carry out homogenization treatment on the cast rod, that is, the homogenization temperature is 485°C, and the time is 22h;

[0035] (3) Perform hot extrusion treatment on the cast rod, that is, preheat the cast rod, mold and extrusion cylinder to 410°C, 450°C and 445°C respectively before extrusion of the homogenized cast rod, and Extrusion speed can be increased to 0.8m / min for middle profile extrusion;

[0036] (4) The profile is stretched, that is, the hot-extruded profile is clamped into a stretching device and stretched, and the stretching elongation is 1%;

[0037] (5) Carry out quenching and heating treatment on the profile, that is, sen...

Embodiment 2

[0044] The difference between this example and Example 1 is that: in step 2), the homogenization treatment temperature is 495°C, and the time is 28h; in step 3), the cast rod, mold and extrusion cylinder are respectively Preheat to 415°C, 455°C and 450°C, and the extrusion exit speed of the profile can be increased to 0.9m / min during extrusion; 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 then immediately shaped, and after the straightening is completed, the clamping parts at both ends of the profile are cut off, and the middle part is reserved. By adopting the above scheme, the present invention can increase the extrusion efficiency of the angle profile to 0.9m / min, and the degree of grain refinement is relatively high.

Embodiment 3

[0046]The difference between this embodiment and the above-mentioned embodiment is that: in step 2), the homogenization treatment temperature is 490°C, and the time is 25h; Preheat to 420°C, 460°C and 460°C, and the extrusion exit speed of the profile can be increased to 1.0m / min during extrusion; 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 then immediately shaped, and after the straightening is completed, cut off the clamping parts at both ends of the profile, and retain the middle part; in step 7 ) before, artificial aging treatment is also carried out on the profiles, that is, the stretched and straightened profiles are put into an aging furnace with a circulating hot air device and two-stage artificial aging is carried out. 15~20h, the temperature of the second stage is 145~170℃, and the time is 6~10h. When loading the furnace, ensure that there is a gap of more than...

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Abstract

The invention discloses a production process of high-strength 2024 aluminum alloy thin-walled corner profiles, which belongs to the technical field of aluminum alloys and comprises the following steps: firstly, performing structural treatment on the mold; then, performing homogenization treatment on the cast rod; then, performing The rod is subjected to hot extrusion treatment; then, the profile is subjected to stretching treatment; then, the profile is subjected to quenching and heating treatment; then, the profile is subjected to stretching and straightening treatment; finally, the profile is subjected to natural aging treatment. The present invention mainly studies the extrusion process technology of high-strength 2024 aluminum alloy thin-walled corner profiles. Through the combination of mold optimization design, extrusion, stretching and heat treatment process development, etc., the finished product rate and production efficiency of the profile products can be improved, which can be achieved. Substitute foreign imported products.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a production process of 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. Among them, most of the 2024 aluminum alloy extruded corner profiles rely on imports. Only a few companies in China can produce, but there are still many problems, mainly reflected in: (1) 2024 aluminum alloy has high strength, high extrusion deformation resistance, difficult extrusion molding, poor products, and difficult to guarantee dimensional tolerances ; (2) Extrusion efficiency of profiles is too low; (3) Profile deformation and resilience after vertical quenching are relatively large, which makes shaping more difficult, and the yield of finished pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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