A method and device for strengthening aluminum alloy components by electromagnetic force at room temperature cycle

An aluminum alloy component and electromagnetic force technology, which is applied in the field of electromagnetic force room temperature cyclic strengthening of aluminum alloy components, can solve the problems that limit the industrial application of high-performance aluminum alloy components, the performance of the core of components cannot meet the requirements of use, the yield of aluminum alloy components and the Quality reduction and other problems, to achieve the effect of improving forming accuracy and manufacturing efficiency, excellent strengthening effect, and reducing strengthening time

Active Publication Date: 2022-05-24
CENT SOUTH UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, there are many problems in this strengthening method.
First, the final shape of the product after the aluminum alloy component is formed is fixed, and then when high-temperature aging and quenching are performed, the complex aluminum alloy component surface temperature inhomogeneity will cause thermal stress, and the core of the component will also be unsatisfactory due to quenching sensitivity. Requirements
Secondly, high-temperature aging and quenching will easily cause deformation or even cracking of aluminum alloy components, resulting in a decrease in the yield and quality of aluminum alloy components and an increase in manufacturing costs
At the same time, compared with other metal structural materials such as steel, the mechanical properties, especially the fatigue strength, of aluminum alloy components prepared by traditional methods are still relatively poor, which hinders the application range of aluminum alloy as a lightweight material.
The above factors limit the application of high-performance aluminum alloy components in actual industrialization

Method used

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  • A method and device for strengthening aluminum alloy components by electromagnetic force at room temperature cycle
  • A method and device for strengthening aluminum alloy components by electromagnetic force at room temperature cycle
  • A method and device for strengthening aluminum alloy components by electromagnetic force at room temperature cycle

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The 2024 aluminum alloy was solution-treated at 493 °C for 1 h in an air circulation resistance furnace, and after water quenching, an aluminum alloy plate was obtained. The electromagnetic force cycle strengthening was carried out at room temperature of 25 ℃, the cycle frequency was 0.2Hz, the cycle number was 450 times, the cycle electromagnetic force amplitude was 290MPa, and the stress ratio was R=-1. After the cyclic strengthening, fatigue test and tensile test were carried out respectively.

Embodiment 2

[0046] The 6061 aluminum alloy was solution-treated at 530°C for 1 h in an air circulation resistance furnace, and then quenched in water to obtain an aluminum alloy plate. The electromagnetic force cycle strengthening was carried out at room temperature of 25℃, the cycle frequency was 0.02Hz, the cycle number was 700 times, the cycle electromagnetic force amplitude was 226MPa, and the stress ratio was R=-1. After the cyclic strengthening, fatigue test and tensile test were carried out respectively.

Embodiment 3

[0048] The 7050 aluminum alloy was solution-treated at 480°C for 1 h in an air circulation resistance furnace, and then quenched in water to obtain an aluminum alloy plate. The electromagnetic force cycle strengthening was carried out at room temperature of 25°C, the cycle frequency was 0.2Hz, the cycle number was 700 times, the cycle electromagnetic force amplitude was 300MPa, and the stress ratio was R=-1. After the cyclic strengthening, fatigue test and tensile test were carried out respectively.

[0049] The mechanical property data of the aluminum alloy components obtained in the examples and comparative examples are specifically shown in Table 1.

[0050] Table 1 Mechanical properties data of aluminum alloy components

[0051]

[0052]

[0053] It can be seen from Table 1 that using the method proposed in the present invention can effectively improve the fatigue strength of aluminum alloy components at room temperature, and can obtain larger yield strength and ten...

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Abstract

The invention relates to the technical field of metal material processing engineering, in particular to a method and a device for strengthening aluminum alloy components by electromagnetic force at room temperature. The method specifically includes the following steps: placing the aluminum alloy member in a magnetic field, and setting coils above and below the aluminum alloy member respectively; feeding an alternating current into the coil to perform cyclic strengthening on the aluminum alloy member, the The cycle frequency is 0.01‑500Hz and the number of cycles is 10‑10 4 Second-rate. The method promotes the aluminum alloy components to produce uniformly distributed fine precipitates at room temperature through the action of electromagnetic force, thereby improving the influence of material grain boundary segregation and improving the mechanical properties of the components.

Description

technical field [0001] The invention relates to the technical field of metal material processing engineering, in particular to a method and a device for cyclically strengthening aluminum alloy components by electromagnetic force at room temperature. Background technique [0002] Aluminum and aluminum alloys have many advantages such as low density, high corrosion resistance, good electrical and thermal conductivity, and are widely used in aerospace and rail transportation. In recent years, with the continuous development of large aerospace components in the direction of light weight, long life and high reliability, the service performance has gradually become extreme, so high requirements have been placed on the performance of components. Large-scale aluminum alloy integral components are usually affected by alternating stress in practical application, and alternating stress is essentially cyclic stress, which will lead to fatigue failure of components. It is estimated that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F3/00
CPCC22F3/00
Inventor 刘春辉吕方璞陈凱亮马培培
Owner CENT SOUTH UNIV
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