Thermo-mechanical treatment method for aluminum alloy

A technology of deformation heat treatment and aluminum alloy, which is applied in the field of electromagnetic forming and aging composite, can solve the problems of heat treatment difficulty, application range limitation, and performance degradation of aluminum alloy formed components, so as to avoid heat treatment, secondary deformation and performance reduction, and simplify Manufacturing process route, effect of improving plasticity

Active Publication Date: 2016-05-04
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, in practical applications, the processing methods for this type of aluminum alloy include pre-deformation-solution quenching-final deformation-artificial aging and other links. Among them, the heat treatment of aluminum alloy formed components is difficult, which easily leads to secondary deformation and decline in service performance. The scope of application is limited

Method used

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  • Thermo-mechanical treatment method for aluminum alloy
  • Thermo-mechanical treatment method for aluminum alloy
  • Thermo-mechanical treatment method for aluminum alloy

Examples

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Effect test

Embodiment example 1

[0026] Take 2 groups of tensile samples (two samples in each group) for solution quenching treatment, and keep the samples in a heating furnace at a temperature of 535°C for 40min. Then double-stage aging treatment, wherein the pre-aging temperature is 140°C, the pre-aging time is 2h, the final aging temperature is 180°C, and the final aging time is 6h. The last group of samples was placed into the mold for electromagnetic uniaxial stretching, with a discharge energy of 10.63kJ and a deformation of 20%. Throughout the process see Figure 6 shown. The aluminum alloy member processed and formed was tested, and its tensile strength was 441MPa, and its elongation after fracture was 21%. Prior Art The 2219 aluminum alloy studied by An Lihui et al. (Trans.NonferrousMet.Soc.China., 2012, 370(75)) is obtained by pre-deformation-solution quenching-final deformation-artificial aging process scheme, according to the same specification Tested, the tensile strength of its components is ...

Embodiment 2

[0028] A group of tensile samples were taken for solution quenching treatment, and the samples were kept in a heating furnace at a temperature of 530°C for 45 minutes. Then double-stage aging treatment, wherein the pre-aging temperature is 100°C, the pre-aging time is 2h, the final aging temperature is 170°C, and the final aging time is 4h. Finally, put it into the mold for electromagnetic uniaxial stretching, the discharge energy is 8.63kJ, and the deformation is 10%. The aluminum alloy member tested and formed has a tensile strength of 384MPa and an elongation after fracture of 27.3%. Compared with the existing technology, the strength is only slightly reduced, but the plasticity is greatly improved.

Embodiment example 3

[0030] Two tensile samples were taken for solution quenching treatment, and the samples were kept in a heating furnace at a temperature of 540°C for 35 minutes. Then double-stage aging treatment, wherein the pre-aging temperature is 160°C, the pre-aging time is 8h, the final aging temperature is 230°C, and the final aging time is 12h. Finally, put it into a mold for electromagnetic uniaxial stretching, with a discharge energy of 15.34kJ and a deformation of 24%. The aluminum alloy component formed by testing was tested, and its tensile strength was 390MPa, and its elongation after fracture was 15.2%. The strength is improved compared to the prior art.

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Abstract

The invention discloses a novel electromagnetic forming and aging thermal treatment combined method for improving the strength and toughness of an aluminum alloy and belongs to the technical field of thermo-mechanical treatment of the aluminum alloy. The method includes the following steps of solution-and-quenching treatment, two-stage aging treatment and electromagnetic forming. Compared with an existing process including the steps of pre-deformation, solution and quenching, final deformation and artificial aging, the novel electromagnetic forming and aging thermal treatment combined method has the beneficial effects that the defects that the existing treatment process is complex, secondary deformation is likely to be caused, and use performance is lowered are overcome, the manufacturing process route for strengthening the aluminum alloy through thermal treatment is simplified, and the phenomena of secondary deformation and performance degradation in a traditional manufacturing process are avoided; and it is proved by tests that an aluminum alloy component formed through the method is free of obvious secondary deformation, and the intensity and plasticity of materials are improved compared with materials obtained through the traditional process. The thermo-mechanical treatment method of the aluminum alloy can be widely used for the fields of aerospace and the industry.

Description

technical field [0001] The invention relates to a new electromagnetic forming and aging composite method for improving the strength and toughness of aluminum alloys, and belongs to the technical field of deformation heat treatment of aluminum alloys. Background technique [0002] With the rapid development of aerospace technology, the requirements for material performance are getting higher and higher, and reducing the structural weight is one of the main methods to improve the performance of aerospace vehicles. Among them, lightweight often starts from improving the tensile strength, elastic modulus or crack growth resistance of the material. Aluminum alloy has a series of advantages such as low density, high specific strength, good formability and corrosion resistance, and low cost, and is widely used in aerospace and industrial fields. Heat treatment of aluminum alloy can improve the mechanical properties of aluminum alloy, enhance corrosion resistance, improve processin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/002C22F1/04
Inventor 黄亮李小霞李建军莫健华王泽宇马慧娟朱辉曾嵘
Owner HUAZHONG UNIV OF SCI & TECH
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