Conical Twin Screw, Barrel

We are offering conical twin screw, barrel.
Specification:
45/90, 45/100, 50/105, 51/105, 55/110, 55/120,58/124, 60/125, 65/120, 65/132,
68/143, 70/135,70/140, 75/150, 80/143, 80/156, 92/188
the above are standard specifications , we can customize according to customers’
requirements.
The compression ratio of screws can be designed according to different products and
ingredients.
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.