ZY SCREW

Single Screw and Barrel for Extruder

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Specification: 

Screw diameter:Ø15-Ø300

Aspect ratio:15-46


Product type:
For different plastic products screw can be used: ordinary type, pin type, barrier type, separation type, exhaust type and so on. 


Base material:

1)38CrMoAlA(JIS SACM645)
2)42CrMo(AISI 4140)


Process:

Heat treatment

Nitriding treatment


Technical Parameters:

Nitriding depth: 0.50mm-0.80mm                                
Nitriding hardness: 900-1000HV               
Nitriding: <= Level 1                   
Surface roughness: Ra 0.4                  
Screw straightness: 0.015mm                
The hardness of the surface after chrome plating:≥950HV       
Chromium layer thickness: 0.025~0.085mm          
Double alloy depth: 3mm


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