extruder plastic screw and barrel for plastic pipe of machinery spare part Material:38CrMoAIA conical twin screw barrel

extruder plastic screw and barrel for plastic pipe of  machinery spare part

 

Our conical twin screw and barrel provide high surface area and low shear screw designs that will optimize the melt homogeneity. 

 

Hardness of adjuster	HB260-290
Depth of nitration	0.4-0.7mm
Hardness of nitration	HV800-1050
Depth of double alloys	0.8-2.0mm
Hardness of double alloys	HRC56-65

 

Screw Main Parameter:

 

Screw Diameter: Φ20mm-Φ300mm

 

Material: 38CrMoAlA; SKD61; SKD11; 40Cr; 42CrMo; high quality alloy steel

 

Technology: Nitriding treatment, alloy coating spraying, heat-treatment

 

Appliance: PVC, PP, PE, PA, PC, ABS, AS etc

 

Depth of Nitrated Layer: 0.40-0.70mm

 

Hardness of nitration: 950-1050Hv

 

Fragility of nitration: Less than grade 1

 

Surface Hardness of Nitrated Cr coating layer: Greater than 950Hv

 

Hardness of Bimetallic Layer: HRC55-62

 

Thickness of Cr-coating Layer: 0.03-0.08mm

 

Depth of Bimetallic Layer: Greater than 2mm

 

Treatment / Technology

 

Heat-treatment

 

Nitriding treatment

 

Alloy coating spraying

 

Electroplate hard-chrome

 

High-frequency quenching

 

Spraying corrosion wear-resisting dual metal layers

 

Vacuum quenching