Conical twin screw&barrel/twin screw extruder: base material: 38CrMoAI A, Special alloy is welded on the flight of screw, prolong
Detailed Description Conical twin screw&barrel/twin screw extruder.

Technical parameter:
1): Depth of Nitration Layer: 0.5-0.8mm
2): Hardness of Nitration: 900-1000HV
3): Fragility of Nitration: Less than grade 1
4): Roughness of the surface: Ra0.4
5): Straightness of the screw: 0.015mm
6): Surface hardness of Nitrated Cr coating Layer: >=950Hv
7): The thickness of Chrome-plating layer: 0.025-0.085mm.