WE PROVIDE ALL KINDS OF EXTRUSION MACHINE SCREW&BARREL:
Diameter:Ø10mm-Ø350mm
L/D ratio: 10-50
According to different material and products, the screw barrel can be chosen from:
General type, Barrier type, Separated type, Vented type, Groove type, Pin type, etc.
According to different material and products to design different screw compression ratio and L/D ratio.
Base materials:
1) 38CrMoAlA (JIS SACM645) 2) 42CrMo (AISI 4140) 3) 4Cr5MoSi V1 (JIS SKD-61)
4) DC53 (JIS G4404) 5) Cr12MOV (SKD11) 6) 9Cr18MOV
Bimetallic alloy materials:
1)Ni-based alloy/Deloro alloy
2)Fe-based alloy
3)Co-based alloy
4)NiCo-based alloy
5)Tungsten carbide/Wolfram carbide
Bimetallic Alloy level |
Level A - containing Tungsten of 40% Level B - containing tungsten of 25% Level C - containing tungsten of 9.5% |
Processing technics:
Heat treatment
High-frequency quenching
Nitriding treatment
Bimetallic alloy welding
Bimetallic alloy centrifugal casting
Hard-chrome electroplating
Technical parameters:
Nitriding layer depth: 0.5-0.8mm
Nitrided Hardness: 900-1000HV (HRC 55-65)
Nitrided brittleness: Less than grade 1
Surface roughness: Ra 0.4
Linearity of screw: 0.015mm
Bimetallic layer depth: 3 mm
Bimetallic layer hardness: HRC 55-70
Hard-chrome plating hardness after nitriding: ≥ 950HV
Chrome-plating layer depth: 0.03-0.1mm

