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Treatment method for improving comprehensive mechanical properties of high-zinc Al-Zn alloy

A technology of comprehensive mechanics and treatment methods, applied in the field of treatment of comprehensive mechanical properties of Al-Zn alloys, can solve problems such as good strengthening effect

Active Publication Date: 2020-09-22
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the present invention overcomes the defect of single processing means in the prior art, introduces the steps of deformation strengthening and graded treatment, does not form new pollution, has no side effects, and has a good strengthening effect

Method used

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  • Treatment method for improving comprehensive mechanical properties of high-zinc Al-Zn alloy
  • Treatment method for improving comprehensive mechanical properties of high-zinc Al-Zn alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A processing method for improving the comprehensive mechanical properties of Al-Zn alloys with high zinc content, which is processed according to the following sequential steps:

[0026] (1) At room temperature, the cut Al-10wt% Zn alloy billet is polished and peeled, first soaked in 40g / L sodium hydroxide solution for 3 minutes, then soaked in 20g / L nitric acid solution for 2 minutes , followed by cleaning with alcohol and drying;

[0027] (2) Solid solution treatment is carried out on the processed sample: keep it at a heating temperature of 470°C for 1 hour, then take it out for water quenching, cool it at room temperature, and then perform primary aging treatment: put it at 120°C for 24 hours, and then take it out Carry out the next rolling deformation treatment;

[0028] (3) Carrying out rolling deformation treatment: carrying out a rolling forming with a reduction of 50%;

[0029] (4) The sample after rolling is subjected to secondary aging treatment and tertiar...

Embodiment 2

[0031] A processing method for improving the comprehensive mechanical properties of Al-Zn alloys with high zinc content, which is processed according to the following sequential steps:

[0032] (1) At room temperature, the cut Al-15wt% Zn alloy cast slab is polished and peeled, first soaked in 60g / L sodium hydroxide solution for 3 minutes, and then soaked in 50g / L nitric acid solution for 1 minute , followed by cleaning with alcohol and drying;

[0033] (2) Solid solution treatment is carried out on the processed sample: keep it at a heating temperature of 450°C for 1 hour, then take it out for water quenching, cool it at room temperature, and then perform primary aging treatment: put it at 150°C for 24 hours, and then take it out Carry out the next rolling deformation treatment;

[0034] (3) Carrying out rolling deformation treatment: carrying out three-pass rolling forming with each reduction being 20%;

[0035] (4) The sample after rolling is subjected to secondary aging ...

Embodiment 3

[0037] A processing method for improving the comprehensive mechanical properties of Al-Zn alloys with high zinc content, which is processed according to the following sequential steps:

[0038] (1) At room temperature, the cut Al-20wt% Zn alloy billet is polished and peeled, first soaked for 3 minutes with a concentration of 50g / L sodium hydroxide solution, and then soaked for 1 minute with a concentration of 30g / L nitric acid solution , followed by cleaning with alcohol and drying;

[0039] (2) Solid solution treatment is carried out on the processed sample: keep it at a heating temperature of 470°C for 1 hour, then take it out for water quenching, cool it at room temperature, and then perform primary aging treatment: put it at 150°C for 24 hours, and then take it out Carry out the next rolling deformation treatment;

[0040] (3) Carrying out rolling deformation treatment: carrying out two-pass rolling forming with each reduction being 30%;

[0041] (4) The sample after rol...

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Abstract

The invention relates to a treatment method for improving comprehensive mechanical properties of high-zinc Al-Zn alloy. The treatment method comprises the following steps of: first, carrying out surface treatment on an Al-Zn alloy casting blank with high zinc content; subsequently carrying solution treatment; afterwards carrying out first-stage ageing treatment; afterwards carrying out rolling deformation treatment; and finally carrying out second-stage ageing treatment and third-stage ageing treatment. Compared with a method adopting deformation reinforcement and multi-stage ageing treatment,the treatment method provided by the invention further improves the strength and plasticity of the high-zinc Al-Zn alloy. The treatment method provided by the invention can easily control the technological parameters, and is free of pollution in a treatment process, free of burning loss and good in effect.

Description

technical field [0001] The invention relates to the technical field of alloy heat treatment, in particular to a treatment method for improving the comprehensive mechanical properties of an Al-Zn alloy with high zinc content. Background technique [0002] Al-Zn alloy has high strength, good casting performance, cutting performance, welding performance and dimensional stability, and low cost, it has a wide range of applications in industry, agriculture, transportation and other fields, and has important commercial application value . [0003] Al-Zn alloys are based on Al and Zn, and some other alloying elements such as silicon, copper, magnesium, etc. are usually added. Such alloys have high mechanical properties in the as-cast state. The solubility of zinc in aluminum is very high at high temperature, and when the temperature drops, the solubility of zinc decreases sharply. Therefore, usually at the cooling rate, zinc can already be supersaturated in the solid solution, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/053
CPCC22F1/053
Inventor 王璐杨林徐帆乙姣姣徐明沁
Owner JIANGSU UNIV OF TECH