PVC screw barrel for plastic extruder
Specification:
Specification:
Diameter: ?15- ?300
L/D ratio:15-50
Base Materials:
High quality alloy steel
1)38CrMoAlA(JIS SACM645)
2)42CrMo(AISI 4140)
3)Cr12MoV(JIS SKD-11)
Bimetallic alloy materials:
1)Fe-based alloy
2)Ni-based alloy/Deloro alloy
3)Co-based alloy
4)NiCo-based alloy
5)Tungsten carbide/Wolfram carbide
1)Fe-based alloy
2)Ni-based alloy/Deloro alloy
3)Co-based alloy
4)NiCo-based alloy
5)Tungsten carbide/Wolfram carbide
Technical Information
Technics:
1) Heat treatment
2) Nitriding treatment
3) Hard-chrome electroplating
4) Bimetallic alloy welding
Technical parameter:
Nitrided layer depth:0.5-0.8mm
Nitrided hardness:900-1000HV
Nitrided brittleness: 2 Level
Surface roughness: Ra0.4
Linearity of screw: 0.015mm
Hard-chrome plating hardness after nitriding:≥950HV
Chrome-plating layer depth:0.025-0.085mm
Bimetallic layer depth:3mm
Bimetallic hardness:HRC50-65