Method for preparing aluminum alloy plate

A technology of aluminum alloy plates and aluminum alloys, applied in the direction of sheets/plates, building components, etc., can solve problems such as broken strips

Active Publication Date: 2009-12-30
SOUTHWEST ALUMINUM GRP
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  • Claims
  • Application Information

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Problems solved by technology

For the LY12 aluminum alloy, since its composition differs greatly from the aluminum alloy composition disclosed in the above-mentioned patent, there is no mention in the above-mentioned patent document how to solve the problem of fracture caused by edge cracking and work hardening in the production of LY12 aluminum alloy sheet. bring the problem

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  • Method for preparing aluminum alloy plate

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preparation example Construction

[0027] An embodiment of the preparation method of an aluminum alloy plate provided by the present invention comprises steps:

[0028] a) rolling LY12 aluminum alloy blank to obtain an aluminum alloy sheet blank with a thickness of 4.0mm to 6.0mm;

[0029] b) performing the first edge trimming on the aluminum alloy plate blank with a thickness of 4.0 mm to 6.0 mm, and then pre-annealing;

[0030] c) rolling the pre-annealed aluminum alloy sheet blank to obtain an aluminum alloy sheet blank with a thickness of 2.0 mm to 2.5 mm;

[0031] d) Perform the first intermediate annealing on the aluminum alloy plate blank with a thickness of 2.0mm to 2.5mm;

[0032] e) Rolling the aluminum alloy plate blank after the first intermediate annealing to a thickness of 0.7 mm to 0.9 mm;

[0033] f) The second trimming is performed on the aluminum alloy plate blank with a thickness of 0.7mm to 0.9mm

[0034] g) performing the second intermediate annealing on the aluminum alloy plate blank th...

Embodiment 1

[0052] Take LY12 aluminum alloy ingot, its composition is shown in Table 1

[0053] Table 1 LY12 aluminum alloy composition content (wt%)

[0054]

[0055] The LY12 aluminum alloy ingot of above-mentioned composition is processed according to the following steps:

[0056] 1) Hot-rolling the aluminum alloy ingot on a 2800mm rolling mill at a temperature of 420°C to obtain an aluminum alloy plate blank with a thickness of 5mm;

[0057] 2) Carry out trimming for the first time on the aluminum alloy billet with a thickness of 5 mm, during the first trimming, reserve a width margin of 120 mm;

[0058] 3) Perform pre-annealing on the aluminum alloy plate and plate blank after trimming for the first time at a temperature of 360°C. When performing pre-annealing, the holding time is 2 hours;

[0059] 4) cold-rolling the aluminum alloy blank after pre-annealing to obtain an aluminum alloy sheet blank with a thickness of 2.5 mm;

[0060] 5) performing the first intermediate anneali...

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Abstract

The invention provides a method for preparing an aluminum alloy plate. The method comprises the following steps of: a) rolling an LY12 aluminum alloy blank to obtain a blank of 4.0 to 6.0mm aluminum alloy plate; b) making the first edge cutting of the blank of the aluminum alloy plate and preannealing the blank; c) rolling the blank of the aluminum alloy plate to obtain the blank of 2.0 to 2.5mm aluminum alloy plate; d) interannealing the blank of the aluminum alloy plate; e) rolling the blank of the aluminum alloy plate to obtain the blank of 0.7 to 0.9mm aluminum alloy plate; f) performing the secondary edge cutting of the blank of the aluminum alloy plate; g) interannealing the blank of the aluminum alloy plate; and h) continuously rolling the blank of the aluminum alloy plate to obtain the blank of 0.25 to 0.35mm aluminum alloy plate. In the method, by performing twice edge cutting treatments of the blank of the aluminum alloy plate in different thicknesses, the strip breakage caused by the enlargement of the cracked edges generated on the edges in the following rolling process can be avoided; and when the blank of the aluminum alloy plate is rolled to be between 2.0 and 2.5mm and between 0.7 and 0.9mm, the first interannealing treatment is carried out respectively, so that 0.25 to 0.35mm aluminum alloy plate is rolled successfully.

Description

technical field [0001] The method for preparing a metal plate of the invention specifically relates to a method for preparing an aluminum alloy plate. Background technique [0002] LY12 aluminum alloy sheet is a typical hard aluminum alloy in the aluminum-copper-magnesium system, which has good strength and heat resistance. Its formability is relatively good in the hot state, annealed and new quenched state, and the heat treatment strengthening effect is remarkable. Among them, the 0.3mm thick LY12 aluminum alloy sheet is widely used in aviation and aerospace fields. [0003] In the prior art, when preparing LY12 aluminum alloy sheet with a thickness of 0.3mm, because the thickness of the finished product is too thin, and the plasticity of the alloy itself is poor, defects such as creasing, edge cracking, and broken strips are prone to occur during the cold rolling process. It is difficult to roll out qualified products. The process of the prior art is: hot-rolling the alu...

Claims

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Application Information

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IPC IPC(8): F16S1/00C22C21/00C22F1/04
Inventor 罗爱民王华春陈新民
Owner SOUTHWEST ALUMINUM GRP
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