The main characteristics of aluminum profiles

(1) Low density: A notable feature of aluminum profiles is their low density, with pure aluminum having a density close to 2.7g/cm3 ³， About one-third of iron or copper; Aluminum profiles vary in density depending on the alloy composition, mainly depending on the density of the added elements; Adding alloying elements such as magnesium, lithium, and silicon to aluminum, especially lithium, reduces the density of the alloy; Adding alloying elements such as chromium, copper, iron, manganese, nickel, zinc to aluminum increases the density of the alloy; Rolling can increase the density of alloys, while cold working reduces the density and increases dislocations. However, after annealing, dislocations disappear and the density increases.

(2) Can be strengthened: Pure aluminum has low strength, but it can be strengthened by cold working or alloying with elements such as magnesium, copper, manganese, silicon, lithium, etc., and further strengthened by heat treatment, resulting in high strength; Aluminum profiles used in industry require the addition of alloy elements aimed at improving the strength of aluminum profiles. Common added elements include magnesium, silicon, copper, zinc, manganese, nickel, etc; These elements can form a solid solution with aluminum, changing the properties of the alloy; For certain specific purposes, small amounts of other elements such as chromium, vanadium, lead, and bismuth can be added to aluminum profiles; Adding titanium and silver to the alloy can improve the ductility of the alloy and achieve a smooth surface when making precision castings.

(3) Easy to process: Aluminum has good plasticity, fast processing speed, and can be extruded into various complex cross-section aluminum profiles, and can be processed by mechanical processes such as turning, milling, boring, and planing; For the machine tools required for stamping processing, the punching pressure is smaller than other metals, the mold life is longer, and any casting method can be used for casting processing.

(4) Corrosion resistance: The surface of aluminum profiles is prone to the formation of a dense and strong oxide protective film, which is only easily damaged under halogen ions and alkaline conditions. Therefore, aluminum has good resistance to atmospheric corrosion and water corrosion.

(5) No low-temperature brittleness: When aluminum is below 0 ℃, as the temperature decreases, its strength and plasticity not only do not decrease, but also increase.

(6) Good conductivity and thermal conductivity: Aluminum's conductivity and thermal conductivity are second only to silver, copper, and gold; At room temperature, the volumetric conductivity of electrical aluminum can reach 62% IACS; If calculated based on the conductivity per unit mass, its conductivity is twice that of copper; But any alloying element will cause a decrease in the conductivity of aluminum.

(7) Strong reflectivity: The polished surface of aluminum has a reflectivity of over 80% against white light, and the higher the purity, the higher the reflectivity; At the same time, aluminum has good reflection properties for infrared, ultraviolet, electromagnetic waves, thermal radiation, etc.

(8) Non magnetic: Impact does not produce sparks, which is very valuable for certain special purposes; Can be used as shielding materials for instruments and electrical equipment, as well as production equipment for flammable and explosive materials.

(9) Good sound absorption: beneficial for indoor decoration and can also be formulated into shock-absorbing alloys; This feature is used in the production of high-end aluminum alloy speakers, especially after texture etching, the actual internal area is greatly increased, which will further improve the overall sound performance.

(10) Nuclear radiation resistance: Aluminum has the same neutron absorption cross-section for high-energy neutrons as other metals; For neutrons in the low-energy range, their absorption cross-section is second only to metals such as beryllium, magnesium, and zirconium; The biggest advantage of aluminum's resistance to nuclear radiation is its fast decay of induced radiation energy generated by irradiation.

(11) Aesthetics: Aluminum profiles have a silver white luster on their surface due to their strong reflective ability. After processing, they can achieve high smoothness and brightness; If processed by special pre-treatment, anodizing, dyeing, or screen printing methods, not only does it have high corrosion resistance, but it also has a beautiful appearance; It can also be further improved for its decorative and functional use through processing methods such as electroplating and chemical plating; Especially now, with the improvement of material living standards, people have higher requirements for home decoration; After texture etching, this advantage will be more prominent in aluminum profiles; Applied to interior decoration, it introduces a new high-end material to the interior decoration industry, making living spaces more noble and elegant. Aluminum profiles