Thermal treatment process for erbium-containing aluminum-magnesium-manganese wrought aluminium alloy

A technology for deforming aluminum alloys and processes, which is applied in the field of heat treatment technology to achieve the effects of good strength, enhanced second-phase strengthening and dispersion strengthening, and stable mechanical properties and corrosion resistance.

Active Publication Date: 2009-04-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The more common states of 5052, 5754, 5083, etc. are the H2n and H3n processes that have been studied more, but there are few reports on the heat treatment process of aluminum-magnesium-manganese deformed aluminum alloy alloys added with trace rare earth element erbium, especially H321, H116 and other states.

Method used

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  • Thermal treatment process for erbium-containing aluminum-magnesium-manganese wrought aluminium alloy
  • Thermal treatment process for erbium-containing aluminum-magnesium-manganese wrought aluminium alloy
  • Thermal treatment process for erbium-containing aluminum-magnesium-manganese wrought aluminium alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Melting aluminum-magnesium-manganese alloys containing erbium, the mass percentage content of each component is Mg4.7%; Mn0.71%; Zr0.11%; Er0.31%; The amount is Al; the alloy is cast into an alloy ingot;

[0031] 2) Homogenize and anneal the alloy ingot, heat it at 280°C for 8 hours, and then hold it at 470°C for 10 hours;

[0032] 3) The homogenized annealed alloy is directly hot-rolled, always rolling along the width direction, about 4-20mm / pass, multi-pass; according to the hot rolling situation, it can be annealed again in the middle, the intermediate annealing temperature is 470 ° C, and the temperature is kept 1h;

[0033] 4) The hot-rolled sheet is cold-rolled to 1.5mm after about 0.5-1mm / pass, multi-pass;

[0034] 5) Perform stabilization annealing on the cold-rolled sheet, keep it at 125-375° C. for 2 hours, and then air-cool to room temperature.

[0035] A total of 6 sets of experiments were carried out, and the alloy samples at different annealing tempe...

Embodiment 2

[0041] 1~4) synchronously with embodiment 1;

[0042] 5) Perform stabilization annealing on the cold-rolled sheet, anneal at 225° C., keep warm for 2 hours, and air-cool to room temperature. The cold-rolled sheet was stabilized and annealed at a temperature of 225°C. A total of 7 groups of experiments were carried out. The holding times were 1, 2, 4, 10, 24, and 48 hours, and air-cooled to room temperature.

[0043] The alloy samples with different annealing times were taken, and their mechanical properties and corrosion resistance were tested. The results are shown in Table 2.

[0044] Table 2Al-4.7Mg-0.7Mn-0.1Zr-0.3Er alloy

[0045] Mechanical properties and Tafel curve test results of annealing at 225°C for different annealing times

[0046] 225℃ / t

1

2

4

10

24

48

σ b

407

402

399

394

384

378

σ 0.2

331

327

323

318

307

301

δ

1...

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Abstract

The thermal treatment process for an aluminum-magnesium-manganese wrought aluminum alloy containing erbium belongs to the filed of metal alloys. The existing aluminum alloy thermal treatment process has the problems of strength reducing, corrosion resisting performance reducing after long term use, etc. The invention aims at providing the thermal treatment process for an aluminum-magnesium-manganese cold-rolled sheet containing erbium, which is realized by homogenizing annealing, hot rolling, cold rolling, stabilizing annealing and other process steps, wherein the stabilizing annealing process comprises the steps that, a cold-rolled sheet is annealed at the temperature of 100-400 DEG C and insulated for 1-48h; the annealing temperature and the insulating time are preferably 125-250 DEG C and 1-8h respectively. The thermal treatment process of the invention ensures the alloy to acquire excellent corrosion resisting performance under the condition that the high plasticity of the aluminum-magnesium-manganese cold-rolled sheet containing erbium is kept at a higher level; the treated alloy can be used for a long time with basically constant performance, and the service range of the alloy is wide.

Description

technical field [0001] The invention relates to a heat treatment process of aluminum-magnesium-manganese series deformed aluminum alloys, in particular to a heat treatment process using stabilization annealing for deformed aluminum alloy materials containing erbium. Background technique [0002] Aluminum-magnesium alloys have excellent plasticity, corrosion resistance and weldability, and can be widely used in aviation, spaceflight, transportation and other fields. However, due to the low strength of this series of alloys, its practical application is limited. This series of alloys is an aluminum alloy that cannot be strengthened by heat treatment, and methods such as work hardening and microalloying are generally used to improve its comprehensive properties. Due to the limited improvement of alloy strength by work hardening, the method of microalloying is generally concerned at present. Studies in recent years have shown that the rare earth element erbium (Er) is an effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
Inventor 聂祚仁林双平黄晖张志军王旭东
Owner BEIJING UNIV OF TECH
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