Screw and barrel sets are core components of injection molding machines and extruders, facing challenges of wear and corrosion. suzhou Jwellmech has achieved a breakthrough through tungsten carbide technology upgrades: the material content has been increased to 30%-50%, forming a rigid "skeleton"; HP/HVOF thermal spray technology achieves comprehensive alloy cladding with extremely low porosity; the substrate undergoes centrifugal casting and nitriding treatment, achieving straightness of 0.015mm/m, forming multi-layered protection and multiplying the service life of the screw.