Creep aging forming method for Al-Zn-Mg-Cu 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 Significant, cost-saving effect

Inactive Publication Date: 2013-07-03
CENT SOUTH UNIV +1
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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 of great significance to propose a creep forming method for Al-Zn-Mg-Cu aluminum alloy for practical production and application.

Method used

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  • Creep aging forming method for Al-Zn-Mg-Cu aluminium alloy plate
  • Creep aging forming method for Al-Zn-Mg-Cu aluminium alloy plate
  • Creep aging forming method for Al-Zn-Mg-Cu aluminium alloy plate

Examples

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Effect test

Embodiment 1

[0027] A2mm thick plates are 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] The B10mm 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] The C20mm 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 provides a creep aging forming method for an Al-Zn-Mg-Cu aluminium alloy plate. The key point is that the method adopts a reasonable solid solution-quenching-pretreatment-creep aging system and is suit for the plate with the thickness of 20 mm to 30 mm. The details are as follows: conducting solid solution for 30 min to 120 min at the temperature of 470 to 485 DEG C, and then quenching; conducting 0 to 10% of pretreatment for the plate after quenching; and then conducting creep aging insulation at the temperature of 120 DEG C to 150 DEG C for 2 to 36 h, wherein the creep stress adopts 100 to 150 Mpa and the forming bending radius is over 1000 mm. Through the adoption of the method to treat the Al-Zn-Mg-Cu alloy, the creep formability of the Al-Zn-Mg-Cu aluminium alloy 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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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/053C21D8/00
Inventor 张新明周良道邓运来蒋裕张劲王冰龙旭初闫国良王亚凤黄英
Owner CENT SOUTH UNIV
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