7075 aluminum alloy ultrasonic solution treatment method

A solution treatment and aluminum alloy technology, applied in the field of ultrasonic solution treatment of 7075 aluminum alloy, can solve the problems of harsh process requirements, difficult thermal processing, narrow thermal processing temperature range, etc., to increase the interval range and reduce the solution time , the effect of reducing the degree of grain growth

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 technical problems of narrow thermal processing temperature range of 7075 aluminum alloy, harsh process requirements and difficult thermal processing

Method used

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  • 7075 aluminum alloy ultrasonic solution treatment method
  • 7075 aluminum alloy ultrasonic solution treatment method
  • 7075 aluminum alloy ultrasonic solution treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A 7075 aluminum alloy ultrasonic solution treatment method, it comprises the steps:

[0035] (1) Raise the temperature of the salt bath in the salt bath furnace to 430°C and keep it warm. The salt bath liquid medium is a nitrate salt bath, the composition is 50% KNO3+50% NaNO3, and the use temperature is between 230-550°C.

[0036] (2) Put the 7075 aluminum alloy workpiece into the salt bath to keep warm.

[0037] (3) After the temperature of the workpiece rises to 430°C, insert the ultrasonic tool head 1-2cm below the surface of the saline solution above the workpiece, and turn on the ultrasound. The ultrasonic frequency is 40KHZ; the ultrasonic intensity is 15W / cm 2 , heat preservation ultrasonic treatment time is 20min;

[0038] (4) Turn off the ultrasonic and take out the ultrasonic tool head. The workpiece is quickly taken out of the salt bath furnace, and quickly quenched into flowing water at room temperature to cool, and the transfer time is less than 8S.

Embodiment 2

[0040] A 7075 aluminum alloy ultrasonic solution treatment method, it comprises the steps:

[0041] (1) Raise the temperature of the salt bath in the salt bath furnace to 445°C and keep it warm. The medium of the salt bath liquid is a nitrate salt bath, the composition is 100% NaNO3, and the operating temperature is between 350-600°C.

[0042] (2) Put the 7075 aluminum alloy workpiece into the salt bath to keep warm.

[0043] (3) After the temperature of the workpiece rises to 445°C, insert the ultrasonic tool head 1-2cm below the surface of the saline solution above the workpiece, and turn on the ultrasound. The ultrasonic frequency is 30KHZ; the ultrasonic intensity is 10W / cm 2 , heat preservation ultrasonic treatment time is 30min;

[0044](4) Turn off the ultrasonic and take out the ultrasonic tool head. The workpiece is quickly taken out of the salt bath furnace, and quickly quenched into flowing water at room temperature to cool, and the transfer time is less than 8S...

Embodiment 3

[0046] A 7075 aluminum alloy ultrasonic solution treatment method, it comprises the steps:

[0047] (1) Raise the temperature of the salt bath in the salt bath furnace to 460°C and keep it warm. The medium of the salt bath liquid is a nitrate salt bath, the composition is 100% KNO3, and the operating temperature is between 350-600°C.

[0048] (2) Put the 7075 aluminum alloy workpiece into the salt bath to keep warm.

[0049] (3) After the temperature of the workpiece rises to 460°C, connect the ultrasonic tool head to the salt bath container, turn on the ultrasonic, and directly input the ultrasonic vibration into the salt solution. The ultrasonic frequency is 20KHZ; the ultrasonic intensity is 5W / cm 2 , heat preservation ultrasonic treatment time is 50min;

[0050] (4) Turn off the ultrasonic and take out the ultrasonic tool head. The workpiece is quickly taken out of the salt bath furnace, and quickly quenched into flowing water at room temperature to cool, and the trans...

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Abstract

The invention discloses a 7075 aluminum alloy ultrasonic solution treatment method, and relates to the technical field of aluminum alloy thermal treatment. The 7075 aluminum alloy ultrasonic solutiontreatment method comprises the steps of salt bath liquid pretreatment, workpiece salt bath insulation, ultrasonic treatment, quenching and the like. A solution temperature required for conventional solution thermal treatment on 7075 aluminum alloy can be reduced, solution time is shortened greatly, the grain growth extent is reduced, and the circumstance of structure overturning is prevented. Thethermal treatment cost can be reduced, the efficiency is improved, aluminum alloy thermal treatment structures are improved, and the combination properties of the aluminum alloy are improved.

Description

technical field [0001] The invention relates to the technical field of heat treatment of aluminum alloys, in particular to a method for ultrasonic solid solution treatment of 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 adjust...

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 朱协彬陈志浩施正林王邦伦周聪祝夫文桂凯旋
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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