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          Plastic Extruder Screw Barrel


          Screw Diameter: Ø15- Ø300
          L/D ratio: 15-46
          Screw Types:
          For different plastic screw can be used: ordinary type, pin type, barrier type,separation type, exhaust type. 
          Base Material:
          1)38CrMoAlA(JIS SACM645)
          2)42CrMo(AISI 4140)
          Treatment Process:
          Tempering Treatment
          High-frequency Quenching
          Nitriding Treatment
          Hard-chrome Electroplating
          Bimetallic Alloy Welding
          Bimetallic Alloy Centrifugal Casting
          Nitriding Depth: 0.50mm-0.80mm
          Nitriding Hardness: HV900-1000
          Nitriding Brittleness: ≤ Grade 1
          Surface Roughness: Ra0.4um
          Screw Linearity: 0.015mm
          Hardness of Chromium Plating after Nitriding: ≥950HV
          Thickness of Chromium Plating: 0.05〜0.10mm
          Alloy Depth: 0.8-2.0mm
          Hardness of Bimetallic Alloy: HRC56-70°(Nicr)

          Copyright 2008,Zhoushan Jianghai Screws Manufacture Co., Ltd. All Rights Reserved.

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