conical /parallel twin screw barrel

JY high grade novel type screw barrel

Technical Index (30g-25000g): 
Depth of Nitrated Layer: 0.5-0.8mm
Hardness of nitration: 900-1020Hv
Fragility of nitration: Less than grade 1
Surface Hardness of Nitrated Cr coating layer: ≥950Hv
Hardness of Bimetallic Layer: HRC55°-72°
Thickness of Cr-coating Layer: 0.03-0.08mm
Depth of Bimetallic Layer: >2mm

Technical Process:

Blanking-Quenching and tempering-Rough machining-Semi finish machining-Finish machining-Nitrating treatment or bimetallica spraging-Testing-Finished product

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