Specification:
Screw element and segmented barrel：Φ18-Φ177mm
Material:
1)W6Mo5Cr4V2
2)38CrMoAIA(JIS SACM645)
3)42CrMo(AIS14140)
4)S45C
Heat treatment Technics:
1)Nitriding treatment
2)Vacuum quenching
Technical parameter:
D/d ratio:1.55
Nitrided layer depth:≥0.4mm
Nitrided hardness:900-1000HV
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