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Processing method of 2024 aluminum alloy board

A technology of aluminum alloy sheet and processing method, which is applied in the field of aluminum alloy, can solve problems such as processing deformation, low corrosion resistance, residual stress on the surface and center of the sheet, achieve good mechanical properties, improve corrosion resistance, and improve mechanical properties Effect

Inactive Publication Date: 2015-02-25
陈帆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2024 aluminum alloy belongs to the Al-Cu-Mg series aluminum alloy, which is a kind of high-strength hard aluminum, which can be strengthened by heat treatment. It has medium plasticity in the quenched and just-quenched state, and the spot welding is good. There is a possibility of forming intergranular cracks when gas welding Tendency, the alloy has good machinability after quenching and cold work hardening, and low machinability after annealing, but its corrosion resistance is not high
The problem solved by this patent is that during the rapid cooling process of the plate, the cooling rate of the surface layer of the plate and the center layer of the plate is inconsistent, so that residual stress is generated on the surface and center of the plate, resulting in the problem of processing deformation
However, the method disclosed in this patent cannot improve the corrosion resistance of 2024 aluminum alloy

Method used

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  • Processing method of 2024 aluminum alloy board

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a) Take a 2024 aluminum alloy plate with a thickness of 15mm, quench the aluminum alloy plate, the temperature during quenching is 515°C, the holding time is 4 hours, and the cooling method is water cooling;

[0039] b) keeping the quenched 2024 aluminum alloy plate at -35°C for 8 hours;

[0040] c) Apply 3% tensile deformation to the 2024 aluminum alloy sheet in the thickness direction;

[0041] d) For the high-temperature aging treatment of the aluminum alloy plate after stretching and deformation, the temperature during the high-temperature aging treatment is 170° C., and the holding time is 10 hours.

Embodiment 2

[0043]a) Take a 2024 aluminum alloy plate with a thickness of 15mm, quench the aluminum alloy plate, the temperature during quenching is 515°C, the holding time is 4 hours, and the cooling method is water cooling;

[0044] b) keeping the quenched 2024 aluminum alloy plate at -40°C for 5 hours;

[0045] c) Apply 3% tensile deformation to the 2024 aluminum alloy sheet in the thickness direction;

[0046] d) For the high-temperature aging treatment of the aluminum alloy plate after stretching and deformation, the temperature during the high-temperature aging treatment is 160° C., and the holding time is 10 hours.

Embodiment 3

[0048] a) Take a 2024 aluminum alloy plate with a thickness of 15mm, quench the aluminum alloy plate, the temperature during quenching is 515°C, the holding time is 4 hours, and the cooling method is water cooling;

[0049] b) keeping the quenched 2024 aluminum alloy plate at -30°C for 8 hours;

[0050] c) Apply 2% tensile deformation to the 2024 aluminum alloy sheet in the thickness direction;

[0051] d) For the high-temperature aging treatment of the aluminum alloy plate after stretching and deformation, the temperature during the high-temperature aging treatment is 160° C., and the holding time is 10 hours.

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Abstract

The invention provides a processing method of a 2024 aluminum alloy board. The processing method comprises the following steps: quenching the 2024 aluminum alloy board at 510-530 DEG C and preserving the heat for 20-40 hours; preserving heat of the quenched 2024 aluminum alloy board at -50 DEG C to -30 DEG C for 2-10 hours; applying 2%-4% tensile deformation in the thickness direction of the 2024 aluminum alloy board; and preserving the heat of the 2024 aluminum alloy board subjected to tensile deformation at 160-180 DEG C for 5-18 hours. Compared with the prior art, after the aluminum alloy board is quenched, low-temperature ageing treatment is firstly performed and then tensile deformation is applied to the aluminum alloy board, so that the mechanical performances of the aluminum alloy board are improved. Moreover, by combining low-temperature aging treatment, tensile deformation and high-temperature ageing treatment and controlling the temperatures of high-temperature aging treatment and low-temperature aging treatment, the 2024 aluminum alloy board is guaranteed to have good mechanical performances, and meanwhile, the corrosion resistance of the 2024 aluminum alloy board is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a method for processing 2024 aluminum alloy plates. Background technique [0002] Aluminum alloy is a general term for aluminum-based alloys. The main alloying elements are copper, silicon, magnesium, zinc, and manganese, and the secondary alloying elements are nickel, iron, titanium, chromium, and lithium. Aluminum alloy has low density, but relatively high strength, close to or exceeding high-quality steel, good plasticity, can be processed into various profiles, has excellent electrical conductivity, thermal conductivity and corrosion resistance, and is widely used in industry. [0003] Aluminum alloys can be divided into two categories: deformed aluminum alloys and cast aluminum alloys according to processing methods: cast aluminum alloys can be divided into aluminum-silicon alloys, aluminum-copper alloys, aluminum-magnesium alloys, aluminum-zinc alloys and aluminum r...

Claims

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Application Information

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IPC IPC(8): C22F1/057
CPCC22F1/057
Inventor 陈帆
Owner 陈帆
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