Advantages and disadvantages of die casting

advantage

The advantages of die casting include excellent dimensional accuracy of the castings. Usually, this depends on the casting material, and the typical value is an error of 0.1 millimeters at the initial 2.5 centimeter size, with an error increase of 0.002 millimeters for every 1 centimeter increase. 

Compared to other casting processes, its casting surface is smooth with a fillet radius of approximately 1-2.5 microns. Compared to sandbox or permanent mold casting methods, castings with a wall thickness of approximately 0.75 millimeters can be manufactured. It can directly cast internal structures, such as wire sleeves, heating elements, and high-strength load-bearing surfaces. 

Other advantages include its ability to reduce or avoid secondary mechanical processing, fast production speed, casting tensile strength up to 415 MPa, and the ability to cast high flowability metals.

shortcoming

The biggest drawback of die casting is its high cost. Casting equipment, molds, and related components are relatively expensive compared to other casting methods. Therefore, it is more economical to produce a large number of products when manufacturing die castings.

 Other drawbacks include that this process is only suitable for metals with high fluidity, and the casting quality must be between 30 grams and 10 kilograms 

In typical die casting, the final batch of castings always has pores. Therefore, no heat treatment or welding can be carried out, as the gas inside the gap will expand under the action of heat, resulting in internal micro defects and surface peeling.