Aluminum casting can be used immediately after machining due to its advantages of precise size and bright surface. As a result, it not only increases the rate of metal application, but also lowers the cost of processing equipment and casting. To save assembly time and metal, a combination of die casting and other metal or nonmetal materials is used. Aluminum casting has many benefits, but it also has some flaws that must be addressed. For example, in die casting, the state is unstable due to the high filling speed of liquid metal, so the standard die casting method is used. Castings with complex concave are difficult to die-cast. Die casting die life is low for high melting point alloys like copper and ferrous metals; it is not suitable for small batch consumption. The main reason for this is that aluminum casting is expensive, die casting machines have a high consumption efficiency, and small batch consumption is uneconomical.
Cast aluminum has a lower density than cast iron or steel, but it has a higher specific strength. As a result, aluminum alloy casting can reduce the weight of a structure under the same load conditions, and it is widely used in the aviation, power, and transportation machinery industries. Aluminum alloy is widely used in the manufacture of civil utensils because of its attractive luster and good corrosion resistance in both the atmosphere and fresh water. Aluminum castings are useful in the chemical industry because pure aluminum has good corrosion resistance in oxidizing acid medium like nitric acid and acetic acid. Thermal conductivity is good in pure aluminum and aluminum alloys. Aluminum alloy is also suitable for manufacturing parts that require good thermal conductivity in power machinery, such as the cylinder head and piston of an internal combustion engine.
Good casting properties are present in the cast aluminum parts. Metal mold and pressure casting can be widely used to improve the internal quality, dimensional accuracy, appearance brightness level, and consumption efficiency of castings due to their low melting points (the melting point of pure aluminum is 660.230oC, and the pouring temperature of Zinc die casting alloy is about 730-750oC). Aluminum liquid has a much longer solidification time than cast steel and cast iron under the same weight condition, thanks to its high latent heat of solidification, and it has good mobility, making it ideal for casting thin-walled and complex castings.
Aluminum casting has a number of advantages, making it a popular casting product among buyers. With the advancement of aluminum casting technology in the future, it will be able to demonstrate its style on a larger scale.
Heating, heat preservation, and cooling are all steps in the heat treatment of aluminum castings. Heating rate, heating temperature, holding time, cooling rate, and heat treatment cycle are all parameters that can be used to describe the entire process. Temperature is a critical component of every heat treatment process specification. The heat treatment process specification cannot be carried out correctly if the temperature measurement is not accurate, resulting in a reduction in aluminum casting quality or even scrap. The key to the heat treatment process is temperature measurement and control, as well as the most important factor influencing deformation. Another important deformation reason is the influence of the cooling process on the deformation of aluminum castings after quenching. The thin part always cools faster than the thick part during the cooling process of metal after heat treatment. To reduce the distortion and cracking tendency of the transition zone due to stress concentration, the gap between the thickness of the workpiece and the cross section of the parts should be as small as possible. Reverse deformation and a pre-expanding hole at the shrinkage end are used to improve the qualified rate of deformation after quenching, according to the deformation law of aluminum casting after heat treatment.
How should you properly store aluminum castings?
1. Store sand cast aluminum castings in a ventilated, dry, and non-corrosive environment.
2. Other chemical elements should not come into contact with sand cast aluminum castings. Chemical elements will react with sand cast aluminum castings when they come into contact with other chemical elements, causing sand cast aluminum castings to be damaged.
3. Each sand cast aluminum casting is unique. When placing the zinc alloy sand cast aluminum casting products, we should customize the special suction tray according to the shape of each sand cast aluminum casting product, ensuring that the sand cast aluminum casting parts are placed in a specific position, ensuring that the sand cast aluminum casting parts are intact and will not be altered in any way.
4. Zinc is a metal that has a high level of activity. It is very easy to oxidize when the temperature reaches the appropriate levels. As a result, when storing zinc alloy sand casting aluminum products, it's important to keep an eye on the temperature and keep them out of direct sunlight.
5. If the raw alloy ingot for casting zinc alloy products is damp, it should be dried before use to avoid blasting injuries or equipment damage during melting.