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A method of aging treatment to improve the mechanical properties of al-zn-mg-cu alloy

A technology of aging treatment and alloy mechanics, applied in the field of heat treatment of metal materials

Active Publication Date: 2022-03-22
郭洋 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both the η' phase and the θ' phase are strengthening phases that appear during the aging treatment process, and the current aging treatment methods for Al-Zn-Mg-Cu alloys cannot achieve this purpose

Method used

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  • A method of aging treatment to improve the mechanical properties of al-zn-mg-cu alloy
  • A method of aging treatment to improve the mechanical properties of al-zn-mg-cu alloy

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Experimental program
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Embodiment 1

[0022] An aging treatment method for improving the mechanical properties of the Al-Zn-Mg-Cu alloy, the composition of the Al-Zn-Mg-Cu alloy used is shown in Table 1-1, the aluminum ingot is extruded, and the extrusion parameters As shown in Table 1-2, then the workers will be subjected to the following solid solution treatment and dual aging treatment, and the schematic diagram of the process curve of solid solution treatment and dual aging treatment is as follows figure 1 Shown:

[0023] 1) Solution treatment: step by step solution treatment, the system is 200℃ / 1h+300℃ / 1h+400℃ / 1h+4700℃ / 1h (heating rate is 55℃ / 1h);

[0024] 2), quenching. Put the workpiece after solid solution treatment into water at 20-40°C for quenching, and the transfer time is less than 5s;

[0025] 3), the first stage of aging: place the quenched workpiece at a temperature of 175±5°C for aging for 3 hours;

[0026] 4) Second-level aging: Put the workpieces that have finished the first-level aging at a ...

Embodiment 2

[0032] Example 2: An aging treatment method for improving the mechanical properties of the Al-Zn-Mg-Cu alloy, the composition of the Al-Zn-Mg-Cu alloy used is shown in Table 1-1, and the aluminum ingot is extruded, The extrusion parameters are shown in Table 1-2, and then the workers will be subjected to the following solution treatment and double-stage aging treatment:

[0033] 1), solution treatment: step by step solution treatment, the system is 200℃ / 1h+300℃ / 1h+400℃ / 1h+470℃ / 1h (heating rate is 55℃ / 1h);

[0034] 2) Quenching: Put the workpiece after solid solution treatment into water at 20-40°C for quenching, and the transfer time is less than 5s;

[0035] 3), the first stage of aging: place the quenched workpiece at a temperature of 175±5°C for aging for 4 hours;

[0036]4) Second-level aging: place the workpieces that have finished the first-level aging at a temperature of 120±5°C for 24 hours.

[0037] After the double-stage aging treatment in this embodiment, the stre...

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Abstract

The present invention generally relates to the technical field of heat treatment of metal materials, and provides an aging treatment method for improving the mechanical properties of Al-Zn-Mg-Cu alloy. %, Mg accounts for 2.30-2.78%, Cu accounts for 2.54-2.78%, Zr accounts for 0.13-0.17%, and the balance is Al. After the alloy is deformed by extrusion, forging or rolling, it is subjected to step-by-step solution treatment (200°C / 1h+300°C / 1h+400°C / 1h+470°C / 1h), and after quenching, it is subjected to the following double-stage aging: In the first step, the quenched workpiece is aged at a temperature of 175±5° C. for 3 to 4 hours, and in the second step, the workpiece is aged at a temperature of 120±5° C. for 23 to 24 hours. The mechanical properties of the alloy treated by the invention are obviously improved.

Description

technical field [0001] The invention generally relates to the technical field of heat treatment of metal materials, in particular to an aging treatment method for improving the mechanical properties of an Al-Zn-Mg-Cu alloy. Background technique [0002] Heat treatment is an indispensable part of the manufacturing process of alloy materials. Through reasonable heat treatment methods, the potential of materials can be fully tapped to meet the requirements of the service environment. Heat treatment refers to a method of changing the surface and internal microstructure of the alloy through thermal action, thereby improving the properties of the alloy, which includes homogenization treatment, solution treatment and aging treatment. The alloy workpiece is subjected to solution treatment, followed by high temperature quenching or cold deformation of the workpiece, and then aging treatment. Aging treatment refers to a heat treatment method in which the alloy workpiece is kept above...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/053
CPCC22F1/053
Inventor 郭洋高文理
Owner 郭洋