Production method of aluminum alloy sheet

A technology of aluminum alloy plate and production method, which is applied in the field of metal materials, can solve problems such as unsatisfactory anti-corrosion performance and unstable anti-corrosion performance, and achieve the elimination of uneven structure and composition, reduction of corrosion sensitivity, and improvement of plastic deformation ability Effect

Active Publication Date: 2013-04-03
SOUTHWEST ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the 5083 alloy is the most used. Its production process mainly relies on secondary cold rolling deformation to improve the mechanical properties of the plate, and then improves its strength and corrosion resistance through heat treatment. Through this production process, the mechanical properties of the aluminum alloy plate can meet the requirements. However, its anti-corrosion performance is unstable, especially for the harsh environment of use, and it cannot meet the requirements of high anti-corrosion performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1.1 The 5083 aluminum alloy ingot with a mass fraction of magnesium element of 4.1% was subjected to homogenization heat treatment at a soaking temperature of 450°C to obtain an aluminum alloy ingot after homogenization heat treatment.

[0033] 1.2 Heat the homogenized aluminum alloy ingot obtained in 1.1 to 460° C. to obtain a heated aluminum alloy ingot.

[0034] 1.3 Use the large deformation rolling process to hot-roll the heated aluminum alloy ingot obtained in 1.2 at a temperature of 300°C, reserve 5% of the deformation, and then cool it to 220°C on the roller table. An intermediate aluminum alloy plate is obtained.

[0035] 1.4 The intermediate aluminum alloy plate obtained in 1.3 is rolled with a small amount of deformation to obtain an aluminum alloy plate with a thickness of 8.0mm.

[0036] According to GB / T22641-2008, the aluminum alloy plate obtained in 1.4 was tested, and the result was in line with the national standard.

Embodiment 2

[0038] 2.1 The 5083 aluminum alloy ingot with a mass fraction of magnesium element of 4.2% was subjected to homogenization heat treatment at a soaking temperature of 480°C to obtain an aluminum alloy ingot after homogenization heat treatment.

[0039] 2.2 Heating the homogenized aluminum alloy ingot obtained in 2.1 to 460° C. to obtain a heated aluminum alloy ingot.

[0040] 2.3 Using the large deformation rolling process, the heated aluminum alloy ingot obtained in 2.2 is hot-rolled at a temperature of 300 °C, with 8% deformation reserved for hot rolling, and then cooled to 220 °C on the machine roller table. An intermediate aluminum alloy plate is obtained.

[0041] 2.4 The intermediate aluminum alloy sheet obtained in 2.3 is rolled with a small amount of deformation to obtain an aluminum alloy sheet with a thickness of 10.0 mm.

[0042] According to GB / T22641-2008, the aluminum alloy plate obtained in 2.4 was tested, and the result was in line with the national standard. ...

Embodiment 3

[0044] 3.1 The 5083 aluminum alloy ingot with a mass fraction of magnesium element of 4.2% was subjected to homogenization heat treatment at a soaking temperature of 480°C to obtain an aluminum alloy ingot after homogenization heat treatment.

[0045] 3.2 Heat the homogenized aluminum alloy ingot obtained in 3.1 to 460° C. to obtain a heated aluminum alloy ingot.

[0046]3.3 Use the large deformation rolling process to hot-roll the heated aluminum alloy ingot obtained in 3.2 at a temperature of 300°C, reserve 8% of the deformation, and then cool it to 220°C on the roller table of the machine. An intermediate aluminum alloy plate is obtained.

[0047] 3.4 The intermediate aluminum alloy plate obtained in 3.3 is rolled with a small amount of deformation to obtain an aluminum alloy plate with a thickness of 10.0 mm.

[0048] According to GB / T22641-2008, the aluminum alloy plate obtained in 3.4 is tested, and the result is in line with the national standard.

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Abstract

The invention provides a production method of an aluminum alloy sheet. The production method comprises the following steps in sequence: homogenizing and thermally treating aluminum alloy ingot with mass percentage of magnesium of 4.0 to 4.5%; heating; carrying out hot rolling while reserving deflection; cooling to obtain an intermediate aluminum alloy sheet; and rolling the intermediate aluminum alloy sheet to obtain the aluminum alloy sheet. Compared with 5083 alloy in the prior art, the aluminum alloy sheet produced by the production method provided by the invention has the advantages that firstly, the content of the magnesium element is controlled to 4.0 to 4.5%, thus the possibility that the second phase Beta is separated along the grain boundary and subgrain boundary can be reduced, and the corrosion sensitivity of the alloy can be reduced; secondly, the mechanical property and the corrosion resistance of the aluminum alloy sheet are improved under the coordination of the rolling deformation and twice-rolling technology; and thirdly, the internal organization of the alloy can be improved through the homogenizing and thermal treatment, the phenomenon that the structure and content of the aluminum alloy ingot cannot meet the uniformity can be eliminated, and the plastic deformation capacity of the alloy is improved.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a production method of an aluminum alloy plate. Background technique [0002] Aluminum alloy is an alloy based on aluminum, the main alloying elements are copper, silicon, magnesium, zinc and manganese. Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. [0003] The production method of aluminum alloy sheet is to pass aluminum alloy or direct cold casting into ingots, or continuous casting into thick strips, followed by hot rolling to a predetermined thickness, and then cold rolling the strips to the final thickness in a separate process, followed by Heat treatment process to improve the mechanical properties and corrosion resistance of aluminum alloy sheets, improve their processing properties, and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/047C21D8/02C22C21/06
Inventor 陈昌云杨吉王军赵涛
Owner SOUTHWEST ALUMINUM GRP
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