Double screw for extruder machine

The screw is operated under high temperature, certain corrosion, strong wear and high torque. Therefore, the screw must:
1) high temperature resistance, no deformation under high temperature; 2) wear resistance, long life; 3) corrosion resistance, material is corrosive; 4) high strength, can bear large torque, high speed; 5) has good cutting performance 6) After heat treatment, the residual stress is small and the thermal deformation is small.

Screw material is 38CrMOAl.

Tempering HB220—270.

Nitriding HRC> 65.