Processing method for inhibiting recrystallization of aluminum alloy sheet

A technology of an aluminum alloy sheet and a processing method is applied in the processing field of inhibiting the recrystallization of the aluminum alloy sheet, so as to achieve the effects of avoiding and reducing the occurrence of recrystallization, obvious economic and social benefits, and improving strength and fracture toughness.

Active Publication Date: 2014-09-03
广西南南铝加工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a processing method for suppressing the recrystallization of aluminum alloy sheets. In view of the above technical problems, the recrystallization of aluminum alloy sheets is suppressed in terms of material composition and material manufacturing process, reducing the dependence on expensive metals, and at the same time satisfying The need for recrystallization suppression of aluminum alloy sheets

Method used

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  • Processing method for inhibiting recrystallization of aluminum alloy sheet
  • Processing method for inhibiting recrystallization of aluminum alloy sheet
  • Processing method for inhibiting recrystallization of aluminum alloy sheet

Examples

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Comparison scheme
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Embodiment 1

[0043] Embodiment 1: The raw material of aluminum alloy consists of 0.06 parts of Si, 0.13 parts of Fe, 2.20 parts of Cu, 2.30 parts of Mg, 6.30 parts of Zn, 0.11 parts of Zr, 0.05 parts of Ti and the balance in parts by weight Al, a total of 100 parts. and achieved by the following steps:

[0044] Step 1: The mixed raw materials were melted at 730°C for 10 hours, and then semi-continuous casting was carried out at a temperature of 700°C and a casting speed of 45mm / min. The cross-sectional size of the slab was 420×1600mm.

[0045] Step 2: Homogenize the slab at 460°C for 36 hours. After homogenization, quickly transfer the slab to a special cooling room for strong wind cooling and spray cooling, and cool the slab to 105°C within 30 minutes Next, after the slab has cooled to room temperature, it is sawed and face milled.

[0046] Step 3: Preheat the slab to 400°C within 4 hours, keep it warm for 30 minutes, then roll the slab to a plate with a set thickness of 20mm, and cut t...

Embodiment 2

[0051] Embodiment 2: The aluminum alloy raw material is made up of 0.06 parts of Si, 0.13 parts of Fe, 2.20 parts of Cu, 2.30 parts of Mg, 6.30 parts of Zn, 0.11 parts of Zr, 0.05 parts of Ti and the balance in parts by weight Al, a total of 100 parts. and achieved by the following steps:

[0052] Step 1: The mixed raw materials were melted at 750°C for 8 hours, and then semi-continuous casting was carried out at a temperature of 680°C and a casting speed of 40mm / min. The cross-sectional size of the slab was 420×1600mm.

[0053] Step 2: Homogenize the slab at 470°C for 36 hours. After homogenization, quickly transfer the slab to a special cooling room for spray cooling. Cool the slab to below 105°C within 40 minutes. After the slab has cooled to room temperature it is sawn and face milled.

[0054] Step 3: Preheat the slab to 400°C within 3 hours, keep it warm for 40 minutes, then roll the slab to a plate with a set thickness of 20mm, and cut the head and tail.

[0055] Ste...

Embodiment 3

[0058] Embodiment 3: The aluminum alloy raw material is made up of 0.06 parts of Si, 0.13 parts of Fe, 2.20 parts of Cu, 2.30 parts of Mg, 6.30 parts of Zn, 0.11 parts of Zr, 0.05 parts of Ti and the balance in parts by weight Al, a total of 100 parts. and achieved by the following steps:

[0059] Step 1: Melt the mixed raw materials at 730°C for 12 hours, then perform semi-continuous casting at a temperature of 680°C and a casting speed of 50mm / min. The cross-sectional size of the slab is 420×1600mm.

[0060] Step 2: Homogenize the slab at 470°C for 36 hours. After homogenization, quickly transfer the slab to the cooling room for air cooling to 390°C, then spray cooling, and cool the slab to within 50 minutes Below 105°C, after the slab is cooled to room temperature, it is sawed and face milled.

[0061] Step 3: Preheat the slab to 420°C within 5 hours, keep it warm for 10 minutes, then roll the slab to a plate with a set thickness of 20mm, and cut the head and tail.

[00...

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Abstract

Field of the invention relates to a processing method for inhibiting recrystallization of aluminum alloy sheets. According to the processing method for inhibiting recrystallization of aluminum alloy sheets, after the homogenization, a slab ingot is transferred to a cooling room for strong wind cooling or spray cooling, on order to cool the slab ingot to a temperature below 105 DEG C in 30-50 minutes. At the same time, the preheating process before hot rolling rapidly heats the ingot, in order to reduce the heat preservation time, re-dissolve the fine of precipitated phases and inhibit the re-precipitation or re-coarsening. The invention does not need expensive Sc element for alloying, inhibits the recrystallization of aluminum alloy sheets only through the process, reduces the recrystallization fraction of the aluminum alloy sheets, and has low cost and obvious economic benefits and social benefits.

Description

technical field [0001] The invention relates to the field of processing methods for suppressing recrystallization of aluminum alloy sheets, in particular to a processing method for suppressing recrystallization of aluminum alloy sheets. Background technique [0002] For a long time, 7xxx series aluminum alloys have been widely used in aerospace manufacturing, such as 7050, 7150, 7075, 7475, 7055 and other alloys. For aircraft upper wing panels and other components, it is required to have high strength, fracture toughness, stress corrosion resistance and other properties. Practice has shown that inhibiting recrystallization has an important impact on the comprehensive properties of aluminum alloy sheets. [0003] The recrystallization behavior of aluminum alloys is closely related to the alloy composition and its preparation process. Sc or Zr-containing alloys can increase the recrystallization temperature of aluminum alloys and inhibit recrystallization. Chinese patent CN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053
Inventor 何克准乐永康周文标刘俊生郑玉林
Owner 广西南南铝加工有限公司
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