The rubber machine screw barrel series products are made of materials such as 38CrMoALA (JIS SACM645), 42CMo (JIS SCM440), 9Cr18MoV, CW6Mo5Cr4V2, etc. The heat treatment adopts nitriding treatment, electroplating hard chromium layer, high-frequency quenching, spraying corrosion-resistant and wear-resistant bimetallic layer, vacuum quenching, etc.

TECHNICAL INDEX

Screw type: Pin screw barrel, hot and cold, feeding screw barrel

Production purpose: rubber machine, rubber machinery

Specification: Inner hole Φ 14- Φ 300 X 8000mm

Length to diameter ratio: L/D=8～20

Surface roughness: Ra0.4 μ m

Nitriding treatment: surface hardness>1000H,

Depth of nitride layer: 0.5-0.8mm

Nitriding hardness: HRC950-1020

Nitriding brittleness:<=Level 1

Screw straightness: 0.0015mm

Chrome plating thickness: 0.05-0.10mm
Alloy depth: 0.8-2.0mm
Dual alloy hardness: HRC56 °~65 ° (nickel based alloy used)