Cyclic pre-deformation method for improving creep age forming capacity and performance of aluminum alloy

A technology of creep aging forming and pre-deformation, which is applied in the direction of furnace type, furnace, heat treatment furnace, etc., to achieve the effects of improving formability, saving energy consumption, improving forming accuracy and manufacturing efficiency

Active Publication Date: 2021-10-08
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a cyclic pre-deformation method for improving the creep aging forming ability and performance of aluminum alloy, and its purpose is to solve the problem

Method used

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  • Cyclic pre-deformation method for improving creep age forming capacity and performance of aluminum alloy
  • Cyclic pre-deformation method for improving creep age forming capacity and performance of aluminum alloy
  • Cyclic pre-deformation method for improving creep age forming capacity and performance of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] The 2219 aluminum alloy is subjected to solution treatment at 535°C for 1 hour in an air circulation resistance furnace, and after water quenching, an aluminum alloy plate is obtained. Then the plate is subjected to cyclic pre-deformation treatment, the cyclic strain amplitude is 0.5%, the strain ratio is -1 (tension-compression symmetry), the frequency is 0.5Hz, the number of cycles is 500 times, and the cycle test temperature is kept at room temperature 25°C. After that, creep aging treatment is carried out. The creep aging temperature is 165°C, the creep time is 12h, and the creep stress is 150MPa. The tensile test is carried out after the plate is taken out and cooled at room temperature.

Example Embodiment

[0032] Example 2

[0033] The 2219 aluminum alloy is subjected to solution treatment at 535°C for 1 hour in an air circulation resistance furnace, and after water quenching, an aluminum alloy plate is obtained. Then the plate is subjected to cyclic pre-deformation treatment, the cyclic strain amplitude is 0.5%, the strain ratio is -1 (tension-compression symmetry), the frequency is 0.5Hz, the number of cycles is 500 times, and the cycle test temperature is kept at room temperature 25°C. Afterwards, creep aging treatment is carried out. The creep aging temperature is 165°C, the creep time is 12h, and the creep stress is 50MPa. The tensile test is carried out after the plate is taken out and cooled at room temperature.

Example Embodiment

[0034] Example 3

[0035] The 2219 aluminum alloy is subjected to solution treatment at 535°C for 1 hour in an air circulation resistance furnace, and after water quenching, an aluminum alloy plate is obtained. Then the plate is subjected to cyclic pre-deformation treatment, the cyclic strain amplitude is 0.5%, the strain ratio is -1 (tension-compression symmetry), the frequency is 0.5Hz, the number of cycles is 500 times, and the cycle test temperature is kept at room temperature 25°C. After that, creep aging treatment is carried out. The creep aging temperature is 120°C, the creep time is 12h, and the creep stress is 150MPa. The tensile test is carried out after the plate is taken out and cooled at room temperature.

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Abstract

The invention provides a cyclic pre-deformation method for improving creep age forming capacity and performance of an aluminum alloy, and relates to non-ferrous metal material processing engineering. The cyclic pre-deformation method comprises the following steps that S1, water quenching is conducted after solid solution of an aluminum alloy plate; S2, the quenched plate is subjected to aging and deformation treatment; S3, the plate subjected to aging and deformation treatment is subjected to cyclic pre-deformation; and S4, creep age forming is conducted on the plate subjected to unreal pre-deformation. According to the method, cyclic pre-deformation is provided, the creep age temperature and creep stress can be reduced while the strength and formability of a component are guaranteed, and compared with the creep temperature and creep stress of conventional aluminum alloy plate creep age forming, the creep temperature is reduced by 20-50 DEG C, the creep stress can be reduced by 10-200 MPa, and the aluminum alloy component can still obtain large creep quantity and mechanical property. The aluminum alloy is subjected to creep age forming at low temperature and time, the forming accuracy and manufacturing efficiency of the component are improved conveniently, shape collaborative manufacturing is facilitated, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to non-ferrous metal material processing engineering, in particular to a cyclic pre-deformation method for improving creep aging forming ability and performance of aluminum alloys. Background technique [0002] Aluminum and aluminum alloys have many advantages such as low density, high corrosion resistance, good electrical and thermal conductivity, etc., and are widely used in aerospace and rail transportation and other fields. The lightweight production of automobiles and the technology of large-scale aluminum alloy integral panels are research hotspots in the manufacture of aluminum alloy parts in recent years. In order to meet the requirements of lightweight and high performance, creep aging forming technology of aluminum alloys has gradually been applied in recent years. During the creep aging process, the initial elastic deformation of the workpiece is produced by loading an external force lower than the yield strength at a s...

Claims

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Application Information

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IPC IPC(8): C22F1/04C21D1/18C22F1/057C21D9/00
CPCC22F1/04C22F1/002C22F1/057C21D9/0081
Inventor 刘春辉吕方璞马培培陈龙辉杨建使
Owner CENT SOUTH UNIV
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