Processing technology of aluminum alloy for cooling device

Abstract

The invention discloses a processing technology of an aluminum alloy for a cooling device. The technologies of composition optimization, blank making, extrusion, quenching, stretcher straightening, aging treatment, cleaning and coating are sequentially carried out; and according to a prepared aluminum alloy cooling fin, the room-temperature tensile strength is not smaller than 320 MPa, the yield strength is not smaller than 230 MPa, the postwelding yield strength is not smaller than 120 MPa, corrosion resistance is high, and the antimicrobial property is good.

Description

technical field

[0001] The invention relates to the technical field of aluminum alloys, in particular to an aluminum alloy processing technology for heat dissipation devices. Background technique

[0002] At present, heat sinks of heat sinks made of aluminum alloys have been widely used. They are light in weight, high in strength, good in wear resistance, not easily deformed after processing, and have excellent thermal conductivity. The structure of the heat exchanger is increasingly pursued to be lighter and thinner, and the change of the structure puts forward higher requirements for the balance of the mechanical strength and thermal conductivity of the aluminum alloy.

[0003] In addition, the surface of the heat sink that has been used for a long time will be corroded by the condensed water accumulated on the surface and the bacteria will multiply. Therefore, while improving the mechanical strength and thermal conductivity of the aluminum alloy, it is also necessary to t...

Examples

Embodiment １

[0025] A kind of aluminum alloy processing technology for heat dissipation device of the present invention, comprises the following steps in sequence:

[0026] (1) Composition optimization; the content of each component is: Si 0.5%, Fe 0.3%, Cu 0.04%, Mn 1%, Zn 1.2%, Mg 0.3%, Zr0.2%, Sr 0.03%, and the balance is Al and unavoidable impurities.

[0027] (2) Billet making;

[0028] (3) Extrude at a speed of 1-1.2m / min, and the temperature of the mold during extrusion is 520±10°C;

[0029] (4) Quenching, the quenching method is air cooling + water cooling;

[0030] (5) Stretching and straightening, the stretching rate is 1.2%;

[0031] (6) Aging treatment, aging treatment at 180°C for 6 hours;

[0032] (7) Cleaning, the surface of the aluminum alloy workpiece is cleaned with water, acetone, and water in sequence;

[0033] (8) Coating, after alkali washing and pickling, immerse in 75°C film treatment agent for 2 minutes, take it out and dry at 120°C for 40 minutes to form a fi...

technical field

[0001] The invention relates to the technical field of aluminum alloys, in particular to an aluminum alloy processing technology for heat dissipation devices. Background technique

[0002] At present, heat sinks of heat sinks made of aluminum alloys have been widely used. They are light in weight, high in strength, good in wear resistance, not easily deformed after processing, and have excellent thermal conductivity. The structure of the heat exchanger is increasingly pursued to be lighter and thinner, and the change of the structure puts forward higher requirements for the balance of the mechanical strength and thermal conductivity of the aluminum alloy.

[0003] In addition, the surface of the heat sink that has been used for a long time will be corroded by the condensed water accumulated on the surface and the bacteria will multiply. Therefore, while improving the mechanical strength and thermal conductivity of the aluminum alloy, it is also necessary to t...

Examples

Embodiment １

[0025] A kind of aluminum alloy processing technology for heat dissipation device of the present invention, comprises the following steps in sequence:

[0026] (1) Composition optimization; the content of each component is: Si 0.5%, Fe 0.3%, Cu 0.04%, Mn 1%, Zn 1.2%, Mg 0.3%, Zr0.2%, Sr 0.03%, and the balance is Al and unavoidable impurities.

[0027] (2) Billet making;

[0028] (3) Extrude at a speed of 1-1.2m / min, and the temperature of the mold during extrusion is 520±10°C;

[0029] (4) Quenching, the quenching method is air cooling + water cooling;

[0030] (5) Stretching and straightening, the stretching rate is 1.2%;

[0031] (6) Aging treatment, aging treatment at 180°C for 6 hours;

[0032] (7) Cleaning, the surface of the aluminum alloy workpiece is cleaned with water, acetone, and water in sequence;

[0033] (8) Coating, after alkali washing and pickling, immerse in 75°C film treatment agent for 2 minutes, take it out and dry at 120°C for 40 minutes to form a fi...