Heat treatment process for improving corrosion resistance of aluminium alloy

A technology of corrosion resistance and aluminum alloy, which is applied in the field of aluminum alloy, can solve the problems of restricting the development and application of aluminum alloy and poor corrosion resistance, and achieve the goal of improving intergranular corrosion resistance, corrosion resistance, and intragranular structure Effect

Inactive Publication Date: 2019-05-21
刘珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although aluminum alloys have good mechanical properties, their corrosion resistance is relatively poor, which limits the development and application of aluminum alloys in certain fields.

Method used

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  • Heat treatment process for improving corrosion resistance of aluminium alloy

Examples

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Effect test

Embodiment 1

[0020] A heat treatment process for improving the corrosion resistance of aluminum alloys, comprising the following steps:

[0021] (1) Soak the aluminum alloy workpiece in acetone for 40 minutes, then take it out, wash it, and dry it to constant weight;

[0022] (2) Heat the aluminum alloy workpiece after the above treatment to 320°C, keep it warm for 6 hours, then adjust the temperature to 280°C with the assistance of the first pulse strong magnetic field, put the aluminum alloy workpiece into the salt bath, and keep it for 22min , and then take out the aluminum alloy workpiece;

[0023] (3) Heat the aluminum alloy workpiece after the above treatment to 420°C, keep it warm for 4 hours, and then lower the temperature to 120°C under the second pulsed strong magnetic field, and keep it for 10 hours;

[0024] (4) Heat the aluminum alloy workpiece after the above treatment to 200°C in the first ultrasonic field, keep it for 35 minutes, remove the first ultrasonic field, adjust t...

Embodiment 2

[0032] A heat treatment process for improving the corrosion resistance of aluminum alloys, comprising the following steps:

[0033] (1) Soak the aluminum alloy workpiece in acetone for 40 minutes, then take it out, wash it, and dry it to constant weight;

[0034] (2) Heat the aluminum alloy workpiece after the above treatment to 330°C, keep it warm for 6-8 hours, then adjust the temperature to 285°C with the assistance of the first pulse strong magnetic field, put the aluminum alloy workpiece into the salt bath, Keep it for 25min, then take out the aluminum alloy workpiece;

[0035] (3) Heat the aluminum alloy workpiece after the above treatment to 425°C, keep it warm for 4-6 hours, and then lower the temperature to 122°C under the second pulsed strong magnetic field, and keep it for 11 hours;

[0036] (4) Heat the aluminum alloy workpiece after the above treatment to 200°C in the first ultrasonic field, keep it for 40 minutes, remove the first ultrasonic field, adjust the te...

Embodiment 3

[0044] A heat treatment process for improving the corrosion resistance of aluminum alloys, comprising the following steps:

[0045] (1) Soak the aluminum alloy workpiece in acetone for 40 minutes, then take it out, wash it, and dry it to constant weight;

[0046] (2) Heat the aluminum alloy workpiece after the above treatment to 326°C, keep it warm for 7 hours, then adjust the temperature to 282°C with the assistance of the first pulse strong magnetic field, put the aluminum alloy workpiece into the salt bath, and keep it for 23min , and then take out the aluminum alloy workpiece;

[0047] (3) Heat the aluminum alloy workpiece after the above treatment to 422°C, keep it warm for 5 hours, and then lower the temperature to 121°C under the second pulsed strong magnetic field, and keep it for 10-11 hours;

[0048] (4) Heat the aluminum alloy workpiece after the above treatment to 200°C in the first ultrasonic field, keep it for 38 minutes, remove the first ultrasonic field, adjus...

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Abstract

The invention discloses a heat treatment process for improving corrosion resistance of an aluminium alloy. The heat treatment process comprises the following steps: (1) cleaning; (2) heating, preserving heat, then regulating the temperature in a pulsed high magnetic field, and treating in a salt bath; (3) heating, preserving the heat, and then decreasing the temperature in a second pulsed high magnetic field; (4) heating to 200 DEG C in a first ultrasonic field, removing the first ultrasonic field, regulating the temperature, then regulating the temperature in a second ultrasonic field, removing the second ultrasonic field, and naturally cooling to room temperature; the corrosion resistance of the aluminium alloy treated by the heat treatment process is obviously improved; and the inter-crystalline corrosion resistance of the treated aluminium alloy is greatly improved.

Description

technical field [0001] The invention belongs to the field of aluminum alloys, and in particular relates to a heat treatment process for improving the corrosion resistance of aluminum alloys. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and is widely used in aviation, aerospace, automobile, machinery manufacturing, and chemical industry. [0003] Aluminum alloy has low density, but relatively high strength, which is close to or exceeds high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity and thermal conductivity. It is widely used in industry, and its usage is second only to steel. Some aluminum alloys can be heat treated to obtain good mechanical and physical properties. [0004] Although aluminum alloys have good mechanical properties, their corrosion resistance is relatively poor, which limits the development and application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C21D1/46
Inventor 刘珍
Owner 刘珍
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