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Heat treatment technology for increasing strength of aluminum alloy profile

An aluminum alloy profile and process technology, applied in the field of aluminum profile processing, can solve the problems of uneven mechanical properties, insufficient strength, unfavorable mutual transformation and precipitation of alloys, etc., so as to improve the efficiency of aging treatment, prevent grain growth, and improve The effect of uniformity

Inactive Publication Date: 2018-12-21
ANHUI CHUANGHONG PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the progress of the times, people's requirements for aluminum alloys are getting higher and higher, not only to maintain the original light characteristics, but also to have a certain strength, especially in the production of auto parts and industries. Multifunctionality is required. Metal alloys will bring different defects due to changes in their composition and internal atomic arrangement, such as light weight, corrosion resistance, but insufficient strength. Heat treatment is an effective means to improve the strength of aluminum alloy profiles, but due to The composition of aluminum alloy profiles is different, and the steps of heat treatment are also different. Most of the current heat treatment adopts primary solution treatment and primary or secondary aging treatment. If the primary solution treatment is to fully dissolve the excess phase, a high temperature is required. Large energy consumption, long time, increased processing costs, the primary and secondary aging treatment is directly processed at a higher temperature, which is not conducive to the mutual transformation of each phase and the uniform precipitation, resulting in uneven mechanical properties of the alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The aluminum alloy profile in this embodiment is 77 series aluminum alloy, and contains the following weight components: Zn 4.5%, Mg1.7%, Cu 0.6%, Si 0.12%, Fe 0.16%, Mn 0.025%, Cr 0.06%, Ti 0.05%, rare earth 0.1%, Ag 0.45%, balance Al.

[0021] A heat treatment process for improving the strength of aluminum alloy profiles. The process includes two-stage solution treatment, annealing treatment, and three-stage aging treatment. The specific steps are as follows:

[0022] 1) Two-stage solution treatment: a plate-shaped aluminum alloy profile with a size of 40×30×2mm is subjected to a one-stage solution treatment at a temperature of 500°C for 8 minutes, and a gradual heating method is used to heat up at a heating rate of 15°C / min Perform a secondary solution treatment at 535°C for 15 minutes; spray the aluminum alloy profile quickly with dry ice to cool down rapidly after solution treatment. The spraying time is 6 seconds, and then use alkali water with a concentration of 6.5% ...

Embodiment 2

[0025] This embodiment is the same as embodiment 1, except that the aluminum alloy profile in this embodiment contains the following weight components: Zn4.2%, Mg 1.4%, Cu 0.5%, Si 0.08%, Fe 0.12%, Mn 0.02%, Cr 0.05%, Ti 0.04%, rare earth 0.08%, Ag 0.1%, the balance Al.

[0026] In this example, in step (1), the first-stage solution treatment temperature is 495°C, the duration is 5 min, the second-stage solution treatment temperature is 530°C, the duration is 3 min, and the heating rate is 8°C / min, and the first-stage aging in step (2) Treatment is 40℃, duration 8h, heating rate 2℃ / min, secondary aging treatment 95℃, duration 10h, heating rate 1℃ / min, tertiary aging treatment 160℃, duration 2h.

Embodiment 3

[0028] This embodiment is the same as embodiment 1, the difference is: this embodiment is the same as embodiment 1, the difference is: the aluminum alloy profile in this embodiment contains the following weight components: Zn 5.1%, Mg 1.9%, Cu 0.85%, Si 0.15%, Fe 0.18%, Mn 0.035%, Cr 0.08%, Ti 0.065%, rare earth 0.15%, Ag 0.6%, and the balance Al.

[0029] In this embodiment, the first-stage solution treatment temperature in step (1) is 505°C, the duration is 15min, the second-stage solution treatment temperature is 540°C, the duration is 20min, the heating rate is 18°C / min, and the first-stage aging in step (2) Treatment at 75℃, duration 20h, heating rate 10℃ / min, secondary aging treatment 130℃, duration 16h, heating rate 12℃ / min, tertiary aging treatment 190℃, duration 6h.

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Abstract

The invention discloses a heat treatment technology for increasing strength of an aluminum alloy profile, and belongs to the technical field of aluminum profile processing. According to the heat treatment technology disclosed by the invention, secondary solid-solution treatment and tertiary aging treatment are combined; the secondary solid-solution treatment is in favor of uniform combination of vacancies and a solid solution, and thus, a foundation is laid for solute to diffuse, cluster and form precipitated phase precipitation through a vacancy mechanism during ageing treatment, and thereby,uniformity of heat treatment is increased, and material property deficiencies brought by single-stage solid-solution treatment and ageing treatment in the prior art are overcome.

Description

Technical field [0001] The invention belongs to the technical field of aluminum profile processing, and specifically relates to a heat treatment process for improving the strength of aluminum alloy profiles. Background technique [0002] Aluminum is the most widely used metal structure material in industrial production and daily life after steel. Aluminum has good material properties, suitable strength, good chemical stability, easy to keep clean, high conductivity, good radiation performance, suitable for Anodized and easy to process. With the progress of the times, people’s requirements for aluminum alloys are becoming higher and higher, not only to maintain the original light weight, but also to have a certain strength, especially in the production of auto parts and industries. It requires versatility. Due to the changes in its composition and internal atomic arrangement, metal alloys will bring different defects, such as light weight, corrosion resistance, but insufficient s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22C21/00
CPCC22C21/00C22F1/04
Inventor 梁新瑶张允程龙张超张曙光张锦涛
Owner ANHUI CHUANGHONG PRECISION MACHINERY
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