The proportion of aluminum is light, the springback is small, the strength is high, close to or more than high-quality steel, the plasticity is good, when the product forming is more complex, it is easier to control than stainless steel, and has excellent conductivity, thermal conductivity and corrosion resistance. At present, the surface treatment process of aluminum, such as anodic oxidation, wire drawing, sand blasting, has been very mature, and aluminum is also widely used in mobile phones. According to the processing method, aluminum alloy can be divided into wrought aluminum alloy and cast aluminum alloy. The number of aluminum and aluminum alloy can be divided into eight series.
Among all series, 1000 series has the most aluminum content, and its purity can reach more than 99.00%. The minimum aluminum content of 1000 series aluminum plate is determined according to the last two Arabic numerals of this series. For example, the last two Arabic numerals of 1050 series are 50. According to the naming principle of international brands, the products with aluminum content above 99.5% must be qualified.
The primary aluminum has good formability and surface treatment, and its corrosion resistance is the best among aluminum alloys. The higher the purity, the lower the strength.
1050, 1070, 1080, 1085, 1100 are commonly used in mobile phones. They are simply extruded (without bending). 1050 and 1100 can be used for chemical sanding, smooth surface, fog surface, normal effect, obvious material grain and good coloring effect; 1080 and 1085 mirror aluminum are often used for bright words and fog effect, without obvious material grain. A series of aluminum are relatively soft, mainly used for decorative or interior parts.
It is characterized by high hardness but poor corrosion resistance, among which the original copper content is the highest, and the 2000 series aluminum alloy represents 2024, 2A16 and 2A02. The copper content of 2000 series aluminum plate is about 3-5%. 2000 series aluminum rods are aviation aluminum materials, which are used as structural materials and are rarely used in conventional industry.
3000 series aluminum alloys are mainly composed of manganese. 3000 series aluminum alloy represents 3003, 3105 and 3A21. The content is between 1.0-1.5, which is a series with better antirust function. It is commonly used for tanks and tanks of liquid products, construction processing parts, construction tools, various lamp parts, as well as various pressure vessels and pipes for thin plate processing. The formability, solubility and corrosion resistance are good.
Generally, when the silicon content is between 4.5-6.0%, the strength is relatively high when the silicon content is high. 4000 series aluminum alloy represent 4a01 and 4000 series aluminum plates, which belong to the series with high silicon content. Good soup flow, less solidification shrinkage, belongs to building materials, mechanical parts, forging materials, welding materials; Low melting point, good corrosion resistance, heat resistance and wear resistance.
5000 series aluminum bar belongs to the more commonly used alloy aluminum plate series, the main element is magnesium, and the magnesium content is between 3-5%. 5000 series aluminum alloy represents 5052, 5005, 5083, 5A05 series. It can also be called aluminum magnesium alloy. The main features are low density, high tensile strength and high elongation. In the same area, the weight of Al Mg alloy is lower than other series, and it is widely used in conventional industry. 5052 is the most commonly used alloy in mobile phones, which is the most representative alloy with medium strength. It has good corrosion resistance, solubility and formability, especially high fatigue strength and sea water resistance. It is often used to make products with high strength requirements, but its coloring effect is not ideal. It is suitable for sand blasting process, not suitable for chemical sand blasting, fog surface, etc, Not suitable for extrusion.
The 6000 series aluminum alloy represents that 6061 mainly contains magnesium and silicon, so it has the advantages of 4000 series and 5000 series. 6061 is a cold-treated aluminum forging product, which is suitable for applications with high requirements of corrosion resistance and oxidation resistance. Good usability, easy coating and good processability. 6061 and 6063 are widely used in mobile phones. The strength of 6061 is higher than that of 6063. Using casting molding, it can cast complex structures and make buckle parts, such as battery cover.
It mainly contains zinc. 7000 series aluminum alloy represents 7075. Also belongs to Aviation series, is al mg Zn Cu alloy, is heat treatable alloy, belongs to super hard aluminum alloy, has good wear resistance. At present, it basically depends on imports, and the production technology of our country needs to be improved
8011 is more commonly used in 8000 Series aluminum alloy, which belongs to other series. Most of them are used in aluminum foil, but they are not commonly used in the production of aluminum sheet.