Parallel twin screw and barrel

Specification:

Diameter: φ45/2-φ200/2

L/D ratio: 16-35
Screw structure and compression ratio can be designed according to different products and parts.

Base Materials:

1)38CrMoAlA(JIS SACM645)

2)42CrMo(AISI 4140)

3)Cr12MoV(JIS SKD-11)

4)4Cr5MoSiV1(JIS-SKD61)

5)9Cr18MoV

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

Technics:

Heat treatment

High-frequency quenching
Nitriding treatment

Hard-chrome electroplating

Bimetallic alloy welding

Bimetallic alloy centrifugal casting

Technical parameter:

Nitrided layer depth:0.5-0.8mm

Nitrided hardness:900-1000HV

Nitrided brittleness: Less than grade 2

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:3-5mm

Bimetallic hardness:HRC50-65

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