[China Aluminum Network] The technical requirements of aluminum alloy die casting mainly include mechanical properties, die casting size and surface quality. 1. Mechanical properties: When using die-casting test specimens, the mechanical properties shall comply with the provisions of GB/T15115. When the die casting body test is used, the mechanical properties of the cut-out sample at the designated site shall not be lower than 75% of the single-cast sample. Dongguan aluminum alloy die-casting, aluminum alloy die-casting.
2. Die Casting Size: The geometry and size of the die casting shall conform to the provisions in the casting drawings. The aluminum alloy die-casting die castings shall be in accordance with the provisions of GB6414 for dimensional tolerances. If there are special provisions and requirements, they shall be indicated on the drawings. The dimensional tolerances of die castings do not include cast tilt. When the die casting needs to be machined, the machining allowance should be carried out according to GB/T11350.
3. Surface quality, high dimensional accuracy of castings, and low surface roughness: The surface roughness of castings should meet the requirements of GB 6060.1. Castings are not allowed to crack, undercast, loose, air bubbles and any penetrating defects, as well as scratches, dents, lack of meat and mesh burrs.
Aluminum alloy die casting products are mainly used for traffic signal lamp shell, handle, fishing wheel accessories, outdoor locks, electrical products, communications equipment, kitchen accessories, motorcycle radiator and speaker cover, LED lamp housing, camera equipment, Heat Sink, auto parts, Electronic communications equipment, electronic game enclosures and other industries, some high-performance, high-precision, high-toughness high-quality aluminum alloy products have also been used in large aircraft, ships and other relatively high demand industries.
Black coating is a type of Surface Treatment used to provide a durable, aesthetic and protective finish to metal parts. It is applied to a range of substrates, including steel, aluminum, and titanium, through various processes such as painting, chemical baths or physical deposition.
Black coating provides an attractive, matte finish that reduces glare and reflections. It is commonly used in industries such as automotive, aerospace, and firearms, where aesthetics and durability are essential. The black coating can also be used for functional purposes, such as to reduce friction and wear.
One of the most common types of black coating is black oxide. Black oxide is created through a controlled chemical reaction that forms a layer of black iron oxide on the surface of the metal. This process enhances the corrosion resistance of the substrate and provides a uniform and attractive black finish. Black oxide is also used to provide a matte black finish to gun parts, as well as to increase the conductivity of electrical components.
Another type of black coating is powder coating, which involves applying a dry powder to the surface of the substrate and baking it in an oven. This process creates a durable, weather-resistant finish that is resistant to damage from UV rays and other environmental factors. Powder coating is widely used in the automotive and manufacturing industries, where it provides a long-lasting, high-gloss black finish.
Finally, black coating can also be achieved through physical vapor deposition (PVD). This involves depositing a thin layer of black material onto the substrate through a vacuum chamber. PVD black coatings are very durable, and are often used in high-precision applications such as medical instruments and aerospace components.
In conclusion, black coating is a versatile and effective way to provide a durable, aesthetic, and protective finish to metal parts. Its visual appeal, corrosion resistance, and wear resistance make it a popular choice in a variety of industries and applications. Whether applied through chemical baths or physical vapor deposition, black coating plays an important role in enhancing the performance and longevity of metal parts.
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