Heat treatment method of aluminum alloy

Abstract

The invention discloses a heat treatment method of an aluminum alloy. The heat treatment method comprises the steps that (1) an aluminum alloy plate is used as a raw material to be subjected to solid solution and quenching, the solid solution treatment temperature is 560 DEG C, and the solid solution holding time is 40 min; and (2) after solid solution and quenching, primary aging under the conditions of 135 DEG C and 6 h, secondary aging under the conditions of 170 DEG C and 8 h and tertiary aging under the conditions of 150 DEG C and 8 h are sequentially carried out, and aging is carried out in an air circulation furnace. The aluminum alloy plate is subjected to three levels of aging heat treatment, and the aluminum alloy with high intergranular corrosion resisting performance and strength can be obtained.

Description

technical field

[0001] The application belongs to the technical field of aluminum alloy material manufacturing, and in particular relates to a heat treatment method for aluminum alloy. Background technique

[0002] Age-hardening aluminum alloy has low density, high specific strength, good corrosion resistance and plastic formability, and is an important lightweight structural material widely used in aircraft manufacturing, mainly including ultra-high strength 7000 series Al-Zn-Mg-Cu alloy (500-700MPa), high-strength 2000 series Al-Cu-Mg alloy (400-500MPa) and medium-strength 6000 series Al-Mg-Si-Cu alloy (300-400MPa), the representative alloy grades are 7075, 2024 and 6056. Compared with the 7000 series and 2000 series aluminum alloys, although the 6000 series aluminum alloys have the advantages of low material density and cost, ingot formability, plastic processing performance, excellent surface treatment performance and low tendency to stress corrosion cracking. However,...

Examples

Embodiment Construction

[0015] The present invention is further illustrated by the following examples: According to the following examples, the present invention can be better understood. However, those skilled in the art can easily understand that the specific material ratios, process conditions and results described in the examples are only used to illustrate the present invention, and should not and will not limit the present invention described in the claims.

[0016] In this embodiment, the aluminum alloy heat treatment method includes steps:

[0017] (1) Solid solution and quenching are carried out with the aluminum alloy plate as the raw material, the solution treatment temperature is 560°C, and the solution holding time is 40 minutes;

[0018] The material of the aluminum alloy sheet includes: 1% Cu; 0.8% Si; 0.5% Fe; 1.1% Mg; 0.6% Mn; 0.1% Cr; 0.2% Zn; 0.1% Ti, The balance is Al.

[0019] (2) After solution quenching, perform primary aging at 135°C / 6h, secondary aging at 170°C / 8h, and tert...

technical field

[0001] The application belongs to the technical field of aluminum alloy material manufacturing, and in particular relates to a heat treatment method for aluminum alloy. Background technique

[0002] Age-hardening aluminum alloy has low density, high specific strength, good corrosion resistance and plastic formability, and is an important lightweight structural material widely used in aircraft manufacturing, mainly including ultra-high strength 7000 series Al-Zn-Mg-Cu alloy (500-700MPa), high-strength 2000 series Al-Cu-Mg alloy (400-500MPa) and medium-strength 6000 series Al-Mg-Si-Cu alloy (300-400MPa), the representative alloy grades are 7075, 2024 and 6056. Compared with the 7000 series and 2000 series aluminum alloys, although the 6000 series aluminum alloys have the advantages of low material density and cost, ingot formability, plastic processing performance, excellent surface treatment performance and low tendency to stress corrosion cracking. However,...

Examples

Embodiment Construction

[0015] The present invention is further illustrated by the following examples: According to the following examples, the present invention can be better understood. However, those skilled in the art can easily understand that the specific material ratios, process conditions and results described in the examples are only used to illustrate the present invention, and should not and will not limit the present invention described in the claims.

[0016] In this embodiment, the aluminum alloy heat treatment method includes steps:

[0017] (1) Solid solution and quenching are carried out with the aluminum alloy plate as the raw material, the solution treatment temperature is 560°C, and the solution holding time is 40 minutes;

[0018] The material of the aluminum alloy sheet includes: 1% Cu; 0.8% Si; 0.5% Fe; 1.1% Mg; 0.6% Mn; 0.1% Cr; 0.2% Zn; 0.1% Ti, The balance is Al.

[0019] (2) After solution quenching, perform primary aging at 135°C / 6h, secondary aging at 170°C / 8h, and tert...