Screw and barrel for extruders

Specifications

Screw and barrel for extruders.We produce high quality parallel twin screw and barrel with ten-year experiences in screw and ba

Screw and barrel for extruders

 

We are a professional manufacturer of screw and barrel that has been in this line for 10 years,we can supply and design all kinds of  screw&barrel according to your requirments.

 

1.Material:

 

1):38CrMoALA (JIS SACM645)

 

This kind of material is applicable to double alloy and common molding screw

 

2):9Gr18MoV

 

3):42CrMo

 

2.Technics:

 

1):Heat-treatment

 

2):Nitriding-treatment

 

3):Spray bimetallic-alloy coating

 

3.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

 

8):Depth of alloy Layer:>2mm