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Heat treatment process of 7A33 aluminum alloy sheet

A technology of aluminum alloy and thin plate, which is applied in the field of heat treatment process of 7A33 aluminum alloy thin plate, can solve the problem that the heat treatment process cannot meet the mechanical performance index, etc., and achieve the effect of good corrosion resistance and good mechanical performance

Inactive Publication Date: 2015-07-01
QINGDAO YUGUANG PRECISION CASTING FACTORY
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing heat treatment process cannot meet the mechanical performance index

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] The 7A33 aluminum alloy sheet heat treatment process of the present embodiment comprises the following steps:

[0017] (1) Homogenize the cast ingot at 450°C for 2 hours, then perform sawing, face milling and aluminum cladding, heat to 390°C for hot rolling, hot rolling to 6.0mm thick, medium temperature rolling to 3.8mm, and then 330°C After 2 hours of intermediate annealing, cold rolling to a finished product thickness of 0.8mm;

[0018] (2) Anneal at 390°C to 410°C, hold for 2 hours;

[0019] Quenching temperature 460°C aging system 75°C 12h + 150°C 20h.

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PUM

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Abstract

The invention discloses a heat treatment process of a 7A33 aluminum alloy sheet; tests research the influence of annealing, quenching and double aging process parameters on the mechanical performance and the structure of the 7A33 aluminum alloy sheet, measure the intergranular corrosion performance, the stress corrosion performance and the electrical conductivity of alloy samples, and determine an O-state annealing process system capable of enabling the alloy sheet to obtain better comprehensive performance to preserve the temperature of 390-410 DEG C for 2 h; a T62-state heat treatment process system is 460 DEG C of quenching temperature and water quenching; and the double aging system is 75 DEG C for 1 h and 150 DEG C for 20 h. The 7A33 aluminum alloy sheet accordant with the requirement is industrially produced.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a heat treatment process for a 7A33 aluminum alloy thin plate. [0003] Background technique [0004] 7A33 aluminum alloy has high strength, toughness, plasticity, welding performance, and excellent resistance to seawater and marine atmospheric corrosion. It is suitable for the manufacture of skins and structural parts of fixed wings of seaplanes, shipboard or coastal helicopters . The existing heat treatment process cannot meet the mechanical performance index. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems in the prior art, the object of the present invention is to provide a heat treatment process for 7A33 aluminum alloy sheet, which has good corrosion resistance and good mechanical properties. [0007] The 7A33 aluminum alloy sheet heat treatment process provided by the invention comprises ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/04
Inventor 陈玉光
Owner QINGDAO YUGUANG PRECISION CASTING FACTORY
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