Aluminum alloy plate and production process thereof

A technology of aluminum alloy plate and production process, which is applied in metal rolling and other directions, can solve the problems of residual stress distribution change, large residual stress, and aluminum alloy plate warping, etc., and achieve the effect of excellent room temperature stability and low residual stress level

Inactive Publication Date: 2014-04-16
东莞市闻誉实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum alloy sheet produced by this method has excellent stability at room temperature, but the residual stress inside the aluminum alloy sheet is relatively large, and the residual stress distribution changes during sawing, which easily causes warping of the aluminum alloy sheet, and finally makes the aluminum alloy sheet poor unevenness

Method used

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  • Aluminum alloy plate and production process thereof
  • Aluminum alloy plate and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] An Al alloy ingot with a thickness of 500 mm, a width of 2000 mm, and a length of 7 m as shown in Table 1 was used for melting according to the DC casting method. These ingots were soaked twice. After performing the homogenization heat treatment under the condition of 550° C.×4 hr, without cooling, the rough rolling of hot rolling was performed directly from the temperature.

[0124] In the above two times of soaking, the homogenization heat treatment was carried out under the condition of 550° C.×4 hr. After the homogenization heat treatment, the ingot was forcibly air-cooled in the soaking furnace by a fan at a cooling rate of 60° C. / hr to Temperatures below 200°C. Then, it heated again to 350 degreeC, and started the rough rolling of hot rolling at this temperature. Hot rolling was carried out to a thickness of 2.5 mm, that is, rough rolling was performed for 9 minutes, followed by finish rolling to obtain a hot-rolled sheet having a thickness of 2.5 mm. The finis...

Embodiment 2

[0128] An Al alloy ingot with a thickness of 500 mm, a width of 2000 mm, and a length of 7 m as shown in Table 1 was used for melting according to the DC casting method. These ingots were soaked twice. After performing the homogenization heat treatment under the condition of 550° C.×4 hr, without cooling, the rough rolling of hot rolling was performed directly from the temperature.

[0129] In the above two times of soaking, the homogenization heat treatment was carried out under the condition of 550° C.×4 hr. After the homogenization heat treatment, the ingot was forcibly air-cooled in the soaking furnace by a fan at a cooling rate of 60° C. / hr to Temperatures below 200°C. Then, it heated again to 520 degreeC, and started the rough rolling of hot rolling at this temperature. It was hot-rolled to a thickness of 2.5 mm, that is, hot-rolled rough rolling for 10 minutes, and then finish rolling to obtain a hot-rolled sheet with a thickness of 2.5 mm. The finish temperature of ...

Embodiment 3

[0133] An Al alloy ingot with a thickness of 500 mm, a width of 2000 mm, and a length of 7 m as shown in Table 1 was used for melting according to the DC casting method. These ingots were soaked twice. After performing the homogenization heat treatment under the condition of 550° C.×4 hr, without cooling, the rough rolling of hot rolling was performed directly from the temperature.

[0134] In the above two times of soaking, the homogenization heat treatment was carried out under the condition of 550° C.×4 hr. After the homogenization heat treatment, the ingot was forcibly air-cooled in the soaking furnace by a fan at a cooling rate of 60° C. / hr to Temperatures below 200°C. Then, it heated again to 500 degreeC, and started the rough rolling of hot rolling at this temperature. Hot rolling was carried out to a thickness of 2.5 mm, that is, hot rolling was performed for 8 minutes of rough rolling, followed by finish rolling to obtain a hot-rolled sheet having a thickness of 2.5...

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Abstract

The invention relates to a production process of an aluminum alloy plate. The production process comprises the following steps of: (1) performing homogenization heat treatment on an aluminum alloy cast ingot, wherein the aluminum alloy cast ingot comprises 0.2-1.2% by weight of Mg, 0.35-1.7% by weight of Si, 0.01-1.0% by weight of Mn, 0.001-1.0% by weight of Cu and the balance of Al and inevitable impurities; the solid-soluted content of Si accounts for 0.45-0.80% by weight, the solid-soluted content of Mg accounts for 0.2-0.60% by weight, and the solid-soluted content of the Si / the solid-soluted content of the Mg is 1.1-2; (2) cooling, further re-heating and performing hot rolling; (3) performing first straightening; (4) performing cold rolling to reduce a plate product in the thickness direction by 0.2%-15%; and (5) performing second straightening to get an aluminum alloy finished product. The aluminum alloy plate produced by the process has the advantages of excellent stability at normal temperature and small residual stress, and is suitable for being used as an outer plate of a motor vehicle.

Description

technical field [0001] The technical field of the present invention relates to aluminum alloy sheets, and in particular to aluminum alloy sheets that are excellent in baking, flatness, coating hardenability, and bending workability (especially flat hemming workability), and are excellent in room temperature stability (room temperature aging suppression) Al-Mg-Si series aluminum alloy plate and its production process. Background technique [0002] In recent years, in response to global environmental problems caused by exhaust gas, etc., transportation machinery such as automobiles has begun to seek improvement in fuel efficiency by reducing the weight of the vehicle body. Therefore, especially for the body of a motor vehicle, the application of a lighter Al alloy material excellent in formability and bake hardenability is increasing, and the steel material has been used conventionally. [0003] Among them, thin and high-strength Al alloy plates, Al- The use of Al alloy shee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22F1/043B21B1/26B21B1/28
Inventor 叶伟炳
Owner 东莞市闻誉实业有限公司
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