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How to ensure the quality of heat dissipation of aluminum alloy in precision parts processing

Aluminum alloys used for extruding heat sinks in precision parts processing must have good thermal conductivity. Generally, alloys with good heat dissipation performance in aluminum alloys include 1A30, 1035, and 6063. The most widely used is 6063 aluminum alloy. 6063 aluminum alloy is mainly due to its good thermal conductivity and excellent mechanical properties. How to ensure the quality of heat dissipation for aluminum alloy products. We should start from the following four aspects:

1. Quality requirements for ingots: The alloy composition of aluminum alloy ingots should be strictly controlled. Ensure the purity of the alloy melt. Ingots should be fully homogenized to achieve uniform structure and properties. The surface of the ingot must be smooth, without segregation or sand particles.

2. Mold/tool requirements: Because aluminum heat sink tools have many insect fins. They will bear a lot of pressure during the squeezing process. Each fin must be very strong and resilient. So the quality of steel molds must be reliable.

3. Reduce extrusion pressure: To prevent fin breakage, the extrusion pressure should be minimized as much as possible. The extrusion force is related to the length of the aluminum rod, the deformation resistance of the alloy, and the degree of deformation. Therefore, the length of the casting rod should not be too long, about 0.6-0.85 times the normal length. Homogenization annealing of ingots can not only make the microstructure and properties uniform. It can also improve extrusion performance and reduce extrusion pressure. Therefore, the ingot needs to be uniformly annealed.

4. Extrusion process: The key to the production of aluminum heat dissipation profiles is the initial trial production of extrusion molds. The operator should allow the main plunger to advance under low pressure below 8MPa. After each fin of the mold is evenly extruded. It can gradually increase pressure to accelerate extrusion. Pay attention to the heating temperature of the tool/mold during the extrusion process. The mold temperature should be close to the temperature of the cast billet.

It is an important task to ensure the quality of heat dissipation of aluminum alloy during precision machining of parts. Let's focus on the quality of aluminum alloy heat dissipation together and create a more comfortable and safe environment for our lives and work.

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