Manufacturing method for aviation 625 MPa grade large-size aluminum alloy pre-stretching plate

A manufacturing method and large-scale technology are applied in the manufacturing field of aluminum alloy pre-stretched sheets, which can solve the problems of unattainable mechanical properties of aluminum alloy sheets, and achieve the effects of good surface, stable performance and uniform thickness

Active Publication Date: 2019-07-23
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problem that the mechanical properties of existing aluminum alloy plates cannot meet the require...

Method used

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  • Manufacturing method for aviation 625 MPa grade large-size aluminum alloy pre-stretching plate
  • Manufacturing method for aviation 625 MPa grade large-size aluminum alloy pre-stretching plate
  • Manufacturing method for aviation 625 MPa grade large-size aluminum alloy pre-stretching plate

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specific Embodiment approach 1

[0052] Specific Embodiment 1: In this embodiment, a method for manufacturing a 625MPa-level large-scale aluminum alloy pre-stretched sheet for aviation is carried out according to the following steps:

[0053] 1. According to the mass percentage of elements, Si≤0.10%, Fe≤0.15%, Cu: 2.0%~2.6%, Mn≤0.10%, Mg: 1.8%~2.3%, Cr≤0.04%, Zn: 7.6%~8.4 %, Ti≤0.06%, Zr: 0.08%~0.18% and the balance is Al, weigh the cathode copper, zinc ingot, primary magnesium ingot, aluminum-titanium master alloy, aluminum-zirconium master alloy and aluminum ingot, and then add it to the dry In the smelting furnace, control the smelting temperature to 720°C-760°C, smelt for 8-18 hours to obtain the aluminum melt, and then introduce it into the holding furnace for degassing and refining, check the composition, and then let the aluminum melt stand for 30 minutes to obtain aluminum alloy melt;

[0054] 2. Cast the molten aluminum alloy obtained in step 1. Control the casting temperature at 685°C-720°C, the ca...

specific Embodiment approach 2

[0064] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the mass percentage of elements in step 1 is Si≤0.06%, Fe≤0.08%, Cu: 2.0%-2.4%, Mn≤0.06%, Mg: 1.9% to 2.2%, Cr≤0.04%, Zn: 7.7% to 8.2%, Ti: 0.01% to 0.03%, Zr: 0.09% to 0.13%, and the balance is Al. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0065] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass percentage of elements in step one is Si≤0.06%, Fe≤0.08%, Cu: 2.25%, Mg: 2.1%, Zn: 7.95 %, Ti: 0.01%, Zr: 0.11%, and the balance is Al. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a manufacturing method for an aviation 625 MPa grade large-size aluminum alloy pre-stretching plate and relates to the field of manufacturing methods for aluminum alloy pre-stretching plates. Through the manufacturing method, the technical problem that mechanical properties of existing aluminum alloy plates cannot reach the requirements of application to specific wing wallboards is solved. The manufacturing method for the aviation 625 MPa grade large-size aluminum alloy pre-stretching plate comprises the steps that raw materials are weighed according to the mass percentof elements, and the plate is obtained after smelting, casting, homogenizing annealing, hot rolling, solution treatment, pre-stretching and three-level aging treatment. The ultrahigh-strength alloy large-size wide plate prepared with the manufacturing method is the large-size pre-stretching plate which is flat in plate face, uniform in thickness, good in surface and stable in performance. The aviation 625 MPa grade large-size aluminum alloy pre-stretching plate prepared with the manufacturing method is widely applied to the fields of spaceflight, aviation and military and civil large aircrafts.

Description

technical field [0001] The invention relates to the field of manufacturing methods of aluminum alloy pre-stretched plates. Background technique [0002] Al-Zn-Mg-Cu alloy is a typical high-strength alloy in aluminum alloys, which can be strengthened by heat treatment, and has the advantages of high strength, high toughness, good corrosion resistance, high specific strength, and specific stiffness. Plates of the alloy in different heat treatment states are widely used in the field of aerospace as the main structural material. However, the mechanical properties of the currently produced aluminum alloy sheets cannot meet the requirements for application to specific wing panels. Therefore, the military and civil aviation Al-Zn-Mg-Cu ultra-high-strength specification sheets still rely on imports. To improve the advanced nature of materials and improve the localization rate of materials, we should vigorously develop Al-Zn-Mg-Cu ultra-high-strength specification sheets for militar...

Claims

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Application Information

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IPC IPC(8): C22F1/053C22C21/10C22C1/02B21C37/02
CPCB21C37/02C22C1/026C22C21/10C22F1/053
Inventor 王凤春吕新宇任伟才刘洪雷刘显东张磊丛福官王洪伍孙黎明吴沂哲王英君佟有志刘有金
Owner NORTHEAST LIGHT ALLOY CO LTD
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