Materials for
UAV Micro Screws require high hardness, high strength, high wear resistance, appropriate toughness, high hardenability, and minimal or no deformation during heat treatment, as well as resistance to cracking during quenching.
When the material being stamped is hard or has high deformation resistance, the punches and dies should be made of materials with good wear resistance and high strength.
When deep drawing stainless steel, aluminum bronze dies can be used because of their good anti-adhesion properties. Guide pillars and bushings require wear resistance and good toughness, so low-carbon steel with surface carburizing and quenching is often chosen.
Furthermore, the main drawback of carbon tool steel is its poor hardenability; when the cross-sectional dimensions of the die parts are large, the core hardness remains low after quenching.
However, when operating on presses with high stroke rates, its good impact resistance becomes an advantage.
For parts such as fixed plates and stripper plates, not only is sufficient strength required, but also minimal deformation during operation.
In addition, cold treatment, cryogenic treatment, vacuum treatment, and surface strengthening methods can be used to improve the performance of UAV
Micro Screws parts.
For cold extrusion dies with poor working conditions for the punch and die, UAV Micro Screws steel with good comprehensive mechanical properties such as sufficient hardness, strength, toughness, and wear resistance should be selected, while also possessing certain red hardness and thermal fatigue strength.