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    2. Extruder screw

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      Extruder screw

      Extruder screw

      • Specifications:
         
        Screw diameter: Ø 15-Ø 300
         
        Aspect ratio: 15-46
         
         
         
        Product type:
         
        For different plastic products, screw can be selected: common type, pin type, barrier type, separation type, exhaust type, etc
         
        Substrate material:
         
        1)38CrMoAlA(JIS SACM645)
         
        2)42CrMo(AISI 4140)
         
         
         
        Treatment process:
         
        heat treatment
         
        Nitriding treatment
         
         
         
        Technical parameters:
         
        Nitriding depth: 0.50mm-0.80mm
         
        Nitriding hardness: 900-1000hv
         
        Nitriding brittleness: < = grade 1
         
        Surface roughness: RA 0.4
         
        Screw straightness: 0.015mm
         
        Hardness of surface chromium plating after nitriding: ≥ 950hv
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