Aluminum alloy is a frequently used material in CNC parts processing, including CNC lathe parts and CNC milling machine parts. Because aluminum alloy has many advantages:
1: Good corrosion resistance
Aluminum alloy has excellent corrosion resistance. This feature is mainly due to the fact that aluminum easily forms a dense and strong AL2O3 protective film on the surface under natural conditions. This protective film not only effectively protects the substrate from corrosion, but also its oxide layer will not fade or fall off, so it does not need to be painted, and maintenance and repair are relatively simple. In addition, aluminum has a very high affinity with oxygen, which makes aluminum alloy more corrosion-resistant than steel. Therefore, many medical device parts and medical parts also use aluminum alloy.
2: Good sealing performance
Aluminum alloy doors and windows have excellent sealing performance. This feature is mainly due to the easy extrusion of aluminum alloy, which makes its cross-sectional dimensions precise, creating favorable conditions for the installation of highly sealing materials such as rubber strips and silicone sealants. For example: the air tightness, water tightness and sound insulation performance of aluminum alloy doors and windows are better than those of wooden doors and windows and steel doors and windows. These advantages not only improve the use function of doors and windows, but also reduce energy consumption.
3: Good strength
Aluminum alloy has superior strength and is a commonly used material in auto parts manufacturers. The tensile strength of pure aluminum is approximately 80 MN/m2, which is only one-fifth that of mild steel. However, after specific heat treatment and alloying strengthening, its strength can be significantly improved. For example, the commonly used aluminum alloy automobile body material 6005A-T6 has a tensile strength of up to 360 MN/m2, which is equivalent to the strength of low carbon steel. So many automobile parts; motorcycle parts and aviation parts can use aluminum alloy
4: Light weight
A distinctive feature of aluminum alloy is its light weight. The density of aluminum is only 2.7g/cm³, which is about 1/3 of steel and copper. This low density allows aluminum alloys to weigh only about 5kg per square meter when manufacturing doors and windows, while steel weighs 10-20kg. In addition, the cross-section of the aluminum alloy is designed as a hollow core and thin wall, which not only further reduces the weight, but also ensures its high bending strength, making the aluminum alloy doors and windows both lightweight and durable. Our company "Vanmodel" uses aluminum alloy to process many precision parts in aerospace parts, drone parts and other fields because it reduces weight.
5: Low density
A distinctive feature of aluminum alloys is their low density. The density of aluminum is about 2.7g/cm³, which is only 1/3 of iron or copper. This low-density property has huge application potential in aviation, aerospace, ships, vehicles and other transportation and construction fields. It not only helps to reduce the weight of materials, thereby reducing moving and processing costs, but also greatly reduces production costs. In our company "Vanmodel" a large number of aluminum alloy parts are manufactured and shipped to many countries. Since it is lighter in weight than stainless steel parts, the shipping costs will be significantly reduced.
6: Good thermal conductivity
Aluminum alloy has good thermal conductivity. This property means aluminum is second only to silver, copper and gold in thermal conductivity, making it excellent in a variety of applications. For example, the heat of molten aluminum can be quickly transferred to the casting mold, greatly shortening the casting cycle. This efficient heat transfer capability finds widespread use in a variety of industrial and household products, including but not limited to cooking appliances and radiators.
7: Easy processing
Aluminum alloy has excellent easy processing characteristics. This characteristic is not only reflected in deformed aluminum alloys, but also in cast aluminum alloys, and the processing performance varies in different states of the alloy. By adding specific alloying elements, cast aluminum alloys with good casting properties or deformed aluminum alloys with excellent plasticity can be obtained. Because it can meet the needs of various complex shapes, it is widely used in various products such as automobile parts manufacturing, motorcycle parts manufacturing, aviation parts manufacturing, drone parts manufacturing, medical products and medical equipment. These parts can be manufactured by CNC machining (including CNC lathe parts and CNC milling machine parts), or by die casting.
8: Beautiful shape
The beautiful shape of aluminum alloy is one of its major features. After anodizing, the surface of aluminum alloy can present a variety of colors such as ancient lead liver copper, golden yellow, silver white, etc., and these colors can be freely selected.
11: Formability
Aluminum alloys have excellent formability, which is mainly due to their specific tensile strength, yield strength, ductility and work hardening rate. These characteristics determine the variation in the amount of deformation allowed by aluminum alloys during the forming process. The formability ratings of commercially available aluminum alloys in different forms are based on specific forming process methods. These ratings serve as a rough guide in the qualitative comparison of metal processing characteristics, but cannot be used as the extreme values of formability for quantitative evaluation.
12: Strong plasticity
Aluminum alloys have excellent plasticity, making them easy to process into various profiles. This property is mainly due to the alloying of aluminum with other metal elements. Aluminum alloy doors and windows are a good example. They are not only light and strong, but also can be made into various complex cross-section profiles through extrusion. This high degree of plasticity meets the needs of door and window designers for new cross-section materials, making aluminum alloys widely used in the construction and manufacturing industries. At the same time, in the manufacture of precision parts, we can use die-casting molds to manufacture precision parts of various shapes.
13: No color change
Aluminum alloy has no obvious color change during the process of changing from solid to liquid. This feature makes it difficult for operators to accurately judge its heating temperature. Due to the lack of intuitive color indication, operators must rely on other means, such as thermometers, to ensure that the alloy reaches the appropriate melting temperature. This characteristic of no color change may increase the uncertainty and complexity of the smelting process.
14: Weld deformation and crack formation tendency are large
Aluminum alloy is prone to weld deformation and crack formation during welding. This is mainly because the linear expansion coefficient and crystallization shrinkage rate of aluminum are about twice that of steel, resulting in greater internal stress during welding. Especially in structures with greater rigidity, this internal stress will further promote the generation of thermal cracks. Therefore, special attention should be paid to controlling welding deformation and preventing crack formation when welding aluminum alloys.
15:Machinability
Aluminum alloys have excellent machinability. There are significant differences in the machining characteristics among the various deformed and cast aluminum alloys, as well as in the different states of these alloys. This variability means that when machining aluminum alloys, special machine tools or techniques may be required to ensure the desired results. CNC machining and die-casting molds are currently the two main ways to manufacture precision aluminum alloy parts.
16: Low high temperature strength and plasticity
Aluminum alloys have low strength and plasticity at high temperatures, which adversely affects the formation of the weld metal. Specifically, due to the reduced strength and plasticity of aluminum at high temperatures, the weld metal is prone to slumping or welding through during the forming process. This characteristic not only affects the welding quality, but may also reduce the stability and safety of the overall structure. Therefore, when using aluminum alloys in high-temperature environments, special attention needs to be paid to this characteristic to avoid potential problems.
17: Watertightness
Aluminum alloy doors and windows have excellent watertightness, which means they can effectively prevent rainwater from penetrating when they are normally closed. This feature is particularly important for buildings that are often exposed to wind and rain. The watertightness of aluminum alloy doors and windows is usually divided into 6 levels to ensure reliable waterproofing under different weather conditions. This high degree of watertightness not only extends the service life of doors and windows, but also reduces internal structural damage and repair costs caused by rainwater penetration. Overall, the watertight nature of aluminum alloys makes it a very popular material in the construction sector.
18: Environmental performance
Aluminum alloys have significant advantages in environmental performance. Compared with ordinary wooden doors, wooden doors usually require the use of paint finishes. These paints and synthetic wood boards may contain harmful substances such as formaldehyde, posing a threat to health. Aluminum alloy doors and windows are considered to be a new generation of environmentally friendly products because they are non-toxic and do not contain other harmful substances and meet environmental protection requirements.
The following is a comparison table of international aluminum alloy models. Friends who are engaged in engineering design, product design or purchasing of precision hardware parts can save it and look it up when they need it.
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