Method for creep age forming of Al-Zn-Mg-Cu series aluminium alloy plate

A technology of creep aging forming and aluminum alloy sheet, which is applied in the field of creep aging forming of Al-Zn-Mg-Cu aluminum alloy sheet, which can solve the problems of high cost and processing that cannot meet the practical application, and achieve simple operation and high effect Remarkably, the effect of improving mechanical properties

Inactive Publication Date: 2013-03-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional aging treatment and processing cannot meet the practical application or the cost is high. Therefore, it is o...

Method used

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  • Method for creep age forming of Al-Zn-Mg-Cu series aluminium alloy plate
  • Method for creep age forming of Al-Zn-Mg-Cu series aluminium alloy plate
  • Method for creep age forming of Al-Zn-Mg-Cu series aluminium alloy plate

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A 2mm thick plate is solidified in an air furnace at 475°C for 60 minutes and then water quenched. The creep aging temperature is 120°C and the creep time is 12h. The creep stress is 100MPa, and the forming pre-bending radius is 1500mm.

Embodiment 2

[0029] B The 10mm thick plate is solidified in an air furnace at 475°C for 60 minutes and then water quenched. After quenching, the plate is pre-stretched by 2%. The creep aging temperature is 120°C and the creep time is 24h. The creep stress is 150MPa. The forming pre-bending radius is 1000mm.

Embodiment 3

[0031] C 20mm thick plate is quenched by water in an air furnace at 475°C for 60 minutes. After quenching, the plate is subjected to 4% pre-compression treatment. The creep aging is selected at 120°C / 36h, the creep stress is 80MPa, and the forming pre-bending radius is 2000mm.

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Abstract

The invention relates to a method for creep age forming of an Al-Zn-Mg-Cu series aluminium alloy plate. The method is characterized in that a reasonable solid solution-quenching-pretreating-creep aging system is adopted, is suitable for plates with the thickness of 2 millimeters-30millimeters and comprises the following steps that solid solution is carried out at 470-485 DEG C for 30 minutes-120 minutes, quenching is then carried out, and the quenched plate is subjected to 0-10% predeformation treatment and creep aging at 120 DEG C-150 DEG C and is thermally insulated for 2-36 hours, wherein the creep stress is between 100 and 150 mega pascals, and the forming bending radius is above 1000 millimeters. The method is utilized to treat Al-Zn-Mg-Cu series aluminium alloy, so that the Al-Zn-Mg-Cu series aluminium creep formability can be effectively improved, and the residual stress of the alloy plate is reduced.

Description

technical field [0001] The invention relates to an Al-Zn-Mg-Cu series aluminum alloy sheet material creep aging forming method and belongs to the technical field of non-ferrous metal material processing engineering. Background technique [0002] The Al-Zn-Mg-Cu series aluminum alloys used in aerospace are heat-treatable alloys that can be strengthened. The alloy mainly precipitates dispersed precipitates through aging, and hinders dislocation movement as the main strengthening mechanism. Due to the small size of the precipitates, dislocations mainly cut through the precipitates, so the size, volume fraction and distance between the precipitates have a great influence on the properties of the alloy. In recent years, in order to meet the requirements of forming Al-Zn-Mg-Cu aluminum alloy monolithic panels, a new forming technology has been proposed. The alloy is formed under the aging temperature, and the elastic deformation is converted into partial plastic deformation, so a...

Claims

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Application Information

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IPC IPC(8): C22F1/04C22F1/057C22F1/053
Inventor 张新明邓运来张劲龙旭初王亚凤黄英房星湛利华
Owner CENT SOUTH UNIV
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