China-Parallel-Twin-Screw-Barrel

December 21, 2018

Base Materials: 
1). 38CrMoAlA(JIS SACM645). 
2). 42CrMo(AISI 4140). 
3). 4Cr5MoSi V1 (JIS SKD-61). 
4). 9Cr18MOV
5). HPT

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 1
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

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