bimetallic screw barrel for plastic rubber extruder

bimetallic screw and barrel for extruder
We can manufacture various kinds of screw barrel according to customers requirements

Size:  screw diameter:Φ20-Φ500mm

          Maximum screw length:10000mm

          Barrel inner bore diameter:Φ500mm

Material:    38CrMoAlA   

                  high quality alloy steel

Technology:  nitriding treatment,

                   alloy coating spraying,

                   heating treatment,

                   screw fully hardening,

Depth of nitrition layer: 0.5-0.8mm

Nitriding treatment, surface hardness: HV≥900-1000

Fragility of nitrition: less than grade 1

Surface roughness: Ra 0.4um

Streightness of screw: 0.015mm

Surface of hardness of nitrated Cr coating layer: ≥950HV

Hardness of Cr coating layer: HRC55-62

Depth of alloy layer:2mm

Used for granulation,PP, PE, PA, PC, ABS,AS PVC etc.