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What is the Difference Between Magnesium Alloy Die Casting and Cast Metal?

Mar. 03, 2020

As a Die Casting Parts Supplier, share with you the difference between magnesium alloy die casting and casting.

According to the pouring process of molten metal, casting can be divided into gravity casting and pressure casting. Gravity casting refers to the process of injecting molten metal into a mold under the gravity of the earth, also known as casting. In the broad sense, gravity casting includes sand casting, metal casting, investment casting, foam lost foam casting, mud casting, etc. Narrow gravity casting refers to metal casting. Die casting refers to the process of injecting metal liquid into the mold under the action of other external forces (except gravity).

Magnesium Alloy Die Cast Part

Magnesium Alloy Die Cast Part

In a broad sense, die casting includes die casting and vacuum casting, low pressure casting, centrifugal casting, etc. The narrow meaning of die-casting especially refers to the die-casting of the die-casting machine, which is called die-casting. The precision foundry has long been engaged in gravity casting of sand and metal molds. These types of casting processes are currently the most commonly used processes in non-ferrous metal casting, and their relative prices are also the lowest. Die casting is metal die casting on a die casting machine, which is currently the most productive casting process. Die-casting machines are divided into hot-chamber die-casting machines and cold-chamber die-casting machines. Compared with cold-chamber die-casting machines, hot-chamber die-casting machines have a higher degree of automation, less material loss, and higher production efficiency.

However, due to the heat resistance of mechanical parts, it can only be used to produce castings of low melting materials such as zinc alloys and magnesium alloys. Due to its high melting point, Aluminum Alloy Die Cast Part, which is widely used today, can only be produced on cold-chamber die casting machines. The main feature of die casting is that the metal liquid fills the cavity under high pressure and high speed, and forms and solidifies under high pressure. The disadvantage of die castings is that because metal liquid fills the cavity under high pressure and high speed, it is inevitable that the air in the cavity is wrapped inside the casting to form subcutaneous holes, so the aluminum alloy die casting should not be heat treated. Die castings should not be sprayed on the surface (but they can be sprayed). Otherwise, the internal holes in the casting will expand when heated and cause the casting to deform or blister. In addition, the mechanical cutting machining allowance of the die casting should also be made small, generally about 0.5mm, which can reduce the weight of the casting, reduce the cutting machining amount to reduce costs, and avoid penetrating into the dense surface layer, exposing subcutaneous air holes, resulting in The workpiece is scrapped.

Our company also has Magnesium Alloy Die Cast Part on sale, welcome to consult.