Screw And Barrel for Single Screw Extruder

• Material used: 38CrMoAlA
                          Alloy (bimetal)

• Technical specifications
  Depth of nitriding layer: 0.5-0.8mm
  Hardness of nitrided surface: 900-1000HV
  Depth of bimetallic layer: 3mm
  Hardness of bimetallic surface: 57~69HRC
  Hardness of chrome-plated surface after nitriding: ≥950HV
  Depth of chrome-plating layer: 0.03-0.09mm
  Surface roughness: Ra 0.4
  Screw linearity: 0.015mm

• Process steps

     Heating treatment→Cooling rapidly→Nitriding process→Joining bimetallic alloy to create screw→Creating barrel through bimetallic alloy centrifugal casting→Applying hard-chrome electroplatin