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Fine-grain Goss aluminum alloy plate and preparation method thereof

An aluminum alloy sheet and fine-grained technology, which is applied in the field of preparation of fine-grained Goss aluminum alloy sheet, can solve the problems of large Goss grain size, etc., and achieve the effect of simple process and simple and reasonable process flow

Active Publication Date: 2021-07-16
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention mainly overcomes the defect that the Goss grain size of the aluminum alloy plate with strong Goss texture strength prepared in the prior art is relatively large, and controls the deformation energy storage of the alloy by changing the cold rolling reduction to regulate the recrystallization of the alloy. Recrystallized Goss grains with small size and stable structure have been obtained to a certain extent, which solves the problem of greatly refining Goss grains under the premise of high-strength Goss texture

Method used

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  • Fine-grain Goss aluminum alloy plate and preparation method thereof
  • Fine-grain Goss aluminum alloy plate and preparation method thereof
  • Fine-grain Goss aluminum alloy plate and preparation method thereof

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Embodiment 1

[0057] The chemical composition of the alloy in Example 1 is Cu 4.3%, Mg 1.3%, Mn 0.6%, Ti 0.09%, and the balance is Al. First, the alloy of Example 1 was homogenized at 480°C for 48 hours, and then hot-rolled at 470°C with a deformation of 83%, and the finishing temperature of the hot rolling was ≥380°C. The hot-rolled sheet is then subjected to cold rolling with a deformation of 5%, followed by recrystallization annealing at 360°C for 240 minutes, then solution treatment at 460°C for 90 minutes, water quenching, and finally natural aging for at least 96 hours, the aged alloy matrix of Example 1 The Goss texture strength is 7.03, and the Goss grain size is 45.14μm.

Embodiment 2

[0059] The chemical composition of the alloy in Example 2 is Cu 3.7%, Mg 1.2%, Mn 0.7%, Ti 0.06%, and the balance is Al. Firstly, the alloy of Example 2 was homogenized at 485°C for 24 hours, and then hot rolled at 480°C with a deformation of 88%, and the finishing temperature of hot rolling was ≥380°C. The hot-rolled sheet is then subjected to cold rolling with a deformation of 13%, followed by recrystallization annealing at 390°C for 120 minutes, then solution treatment at 465°C for 30 minutes, water quenching, and finally natural aging for at least 96 hours, the aged alloy matrix of Example 2 The Goss texture strength is 8.35, and the Goss grain size is 39.81μm.

Embodiment 3

[0061] The chemical composition of the alloy in Example 3 is Cu 3.8%, Mg 1.6%, Mn 0.4%, Ti 0.06%, and the balance is Al. First, the alloy of Example 3 was homogenized at 495°C for 72 hours, and then hot rolled at 485°C with a deformation of 90%, and the finishing temperature of the hot rolling was ≥380°C. The hot-rolled sheet is then subjected to cold rolling with a deformation of 20%, followed by recrystallization annealing at 450°C for 60 minutes, then solution treatment at 480°C for 90 minutes, water quenching, and finally natural aging for at least 96 hours, the aged alloy matrix of Example 3 The Goss texture strength is 10.17, and the Goss grain size is 35.16μm.

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Abstract

The invention discloses a fine grain Goss aluminum alloy plate and a preparation method thereof. The plate comprises 3.7-4.8 wt% of Cu, 1.2-1.7 wt% of Mg, 0.3-0.8 wt% of Mn, 0.03-0.10 wt% of Ti and the balance Al. The preparation method comprises the following steps: 1, homogenizing an Al-Cu-Mg alloy ingot with specific components at 470-505 DEG C; 2, carrying out high-temperature large-deformation and high-finish-rolling-temperature hot rolling of 80%-98% at the temperature of 465-495 DEG C; 3, directly carrying out room-temperature cold rolling with medium and small deformation of 5%-50% ; 4, carrying out recrystallization annealing at the temperature of 300-450 DEG C; 5, carrying out solution treatment at the temperature of 460-505 DEG C; and 6, carrying out the final natural aging for at least 96 hours. According to the fine grain Goss aluminum alloy plate and the preparation method thereof, the defect that in the prior art, the grain size of Goss orientation in the aluminum alloy plate with the high Goss texture strength reaches hundreds of micrometers can be overcome, the deformation energy storage of an alloy is controlled by changing the cold rolling reduction, then the recrystallization degree of the alloy is regulated and controlled, and recrystallization Goss grains with the small size and the stable structure are obtained. According to the fine grain Goss aluminum alloy plate and the preparation method thereof, the process is simple, the aluminum alloy cold-rolled plate with the Goss grain size less than 20 [mu]m can be prepared, and the fine grain Goss aluminum alloy plate and the preparation method thereof are suitable for large-scale industrial production and application.

Description

technical field [0001] The invention relates to a preparation process of a fine-grain aluminum alloy plate; in particular, it relates to a preparation process of a fine-grain Goss aluminum alloy plate; it belongs to the technical field of non-ferrous metal material preparation. Background technique [0002] Compared with other aluminum alloys, Al-Cu-Mg alloys have high damage tolerance and good fatigue crack growth resistance, such as 2024, 2524 and other alloys. Since parts at different positions on the aircraft fuselage are subject to different load conditions, Al-Cu-Mg alloys are mainly used for aircraft skin materials. Therefore, in order to meet the requirements of material optimization and reliability design, it is important to improve the fatigue damage resistance of Al-Cu-Mg alloys through traditional processing and heat treatment methods under the premise of comprehensive consideration of cost, preparation, processing and production technology. practical significan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16C22F1/057
CPCC22C21/16C22F1/057
Inventor 刘志义刘飞何光宇
Owner CENT SOUTH UNIV