The advantages and disadvantages of die casting

 Advantages

Advantages of die casting include excellent dimensional accuracy. This generally depends on the casting material, but typical values ​​are 0.1 mm for the first 2.5 cm of the casting and 0.002 mm for each additional cm. Compared to other casting processes, it produces smooth casting surfaces with corner radii of approximately 1-2.5 μm. It can produce castings with wall thicknesses of approximately 0.75 mm compared to sandbox or permanent mold casting. It can directly cast internal structures such as wire sleeves, heating elements, and high-strength bearing surfaces. Other advantages include the ability to reduce or avoid secondary machining, high production speeds, casting tensile strengths of up to 415 MPa, and the ability to cast highly fluid metals.

Disadvantages

The biggest disadvantage of die casting is its high cost. The casting equipment, as well as the molds and mold-related components, are relatively expensive compared to other casting methods. Therefore, it is economical to produce die castings in large quantities. Other disadvantages include that the process is only suitable for metals with high fluidity and that the casting mass must be between 30 g and 10 kg [5]. In conventional die casting, the final batch of castings will always contain porosity. Therefore, no heat treatment or welding can be performed because the gas in the gap will expand under the action of heat, causing internal micro-defects and surface peeling.