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Low temperature ultrasonic aging treatment method for 7075 aluminium alloy

A technology of ultrasonic aging and treatment method, which is applied in the field of aluminum alloy heat treatment, can solve the problems of complex aging process, long aging time and low efficiency, and achieve the effects of improving overall performance, reducing the time required for aging, and dispersing the distribution

Inactive Publication Date: 2018-12-18
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the current 7075 aluminum alloy aging process complex, long aging time and low efficiency, still need to further improve the technical problems of aging aluminum alloy performance

Method used

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  • Low temperature ultrasonic aging treatment method for 7075 aluminium alloy
  • Low temperature ultrasonic aging treatment method for 7075 aluminium alloy
  • Low temperature ultrasonic aging treatment method for 7075 aluminium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of 7075 aluminum alloy low-temperature ultrasonic aging treatment method, it comprises the steps:

[0038] (1) Raise the temperature of the oil bath in the constant temperature oil bath to 120°C and keep it warm. The oil bath medium is methyl silicone oil.

[0039] (2) Put the 7075 aluminum alloy workpiece after solid solution treatment into the oil bath for heat preservation.

[0040] (3) After the temperature of the workpiece rises to the temperature of the oil bath, the power ultrasonic field is then introduced into the oil bath. The power ultrasonic field introduction process adopts continuous input, the ultrasonic tool head is closely fixed with the surface of the workpiece, the ultrasonic is turned on, and the ultrasonic vibration is directly transmitted to the workpiece substrate. The ultrasonic frequency range is 40KHZ; the ultrasonic intensity is 15W / cm 2 . The aging process time is 1h.

[0041] (4) Turn off the ultrasonic and take out the ultrasoni...

Embodiment 2

[0043] A kind of 7075 aluminum alloy low-temperature ultrasonic aging treatment method, it comprises the steps:

[0044] (1) Raise the temperature of the oil bath in the constant temperature oil bath to 80°C and keep it warm. The oil bath medium is methyl silicone oil.

[0045] (2) Put the 7075 aluminum alloy workpiece after solid solution treatment into the oil bath for heat preservation.

[0046] (3) After the temperature of the workpiece rises to the temperature of the oil bath, the power ultrasonic field is then introduced into the oil bath. The power ultrasonic field introduction process adopts continuous input, insert the ultrasonic tool head into the 1-2cm below the oil surface above the workpiece, and turn on the ultrasonic. The ultrasonic frequency range is 30KHZ; the ultrasonic intensity is 10W / cm 2 . The aging process time is 1.5h.

[0047] (4) Turn off the ultrasonic and take out the ultrasonic tool head. Take the workpiece out of the oil bath and air cool to r...

Embodiment 3

[0049] A kind of 7075 aluminum alloy low-temperature ultrasonic aging treatment method, it comprises the steps:

[0050] (1) Keep the temperature of the oil bath in the constant temperature oil bath at room temperature of 25°C and keep it warm. The oil bath medium is methyl silicone oil.

[0051] (2) Put the 7075 aluminum alloy workpiece after solid solution treatment into the oil bath for heat preservation.

[0052] (3) After the temperature of the workpiece rises to the temperature of the oil bath, the power ultrasonic field is then introduced into the oil bath. The power ultrasonic field is introduced by connecting the ultrasonic tool head with the oil bath container, turning on the ultrasonic, and indirectly inputting the ultrasonic vibration into the oil bath. The power ultrasonic field introduction process adopts the pulse method, that is, ultrasonic treatment with a duration of 30 minutes is performed every 10 minutes during the aging process. Ultrasonic frequency ra...

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Abstract

The invention discloses a low temperature ultrasonic aginreatmentg t method for a 7075 aluminium alloy and relates to the technical field of aluminium alloy heat treatment. The low temperature ultrasonic aging treatment method for the 7075 aluminium alloy comprises the steps of oil bath liquid pre-heating, workpiece oil bath heat preservation, ultrasonic aging treatment, cooling and so on. According to the low temperature ultrasonic aging treatment method for the 7075 aluminium alloy, the aging temperature needed by 7075 aluminium alloy traditional aging heat treatment can be reduced, the aging time can be greatly shortened, and the precipitated phase number is increased, the precipitated phase distribution is more dispersed. Compared with a traditional aging heat treatment method, the lowtemperature ultrasonic aging treatment method for the 7075 aluminium alloy has the advantages that requirements on an aging process can be reduced, the heat treatment cost can be reduced, the efficiency can be enhanced, the aluminium alloy aging heat treatment structure can be improved, and the aluminium alloy comprehensive performance can be improved.

Description

technical field [0001] The invention relates to the technical field of heat treatment of aluminum alloys, in particular to a low-temperature ultrasonic aging treatment method for 7075 aluminum alloys. Background technique [0002] Aluminum alloy has the advantages of good electrical conductivity, thermal conductivity, corrosion resistance, high specific strength and specific stiffness, and is widely used in aviation, aerospace, transportation and other fields. 7075 aluminum alloy belongs to the Al-Zn-Mg-Cu series heat-treatable strengthening alloy, which has the advantages of high strength and good thermal processing performance, and is one of the main structural materials in the aerospace field. Its main disadvantages are poor fatigue resistance, sensitivity to stress concentration, obvious stress corrosion tendency, and lower heat resistance than duralumin. In recent decades, the comprehensive performance of aluminum alloys can be significantly improved by studying and ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/053
CPCC22F1/002C22F1/053
Inventor 陈志浩曹伟朱协彬姚敏
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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