conical twin screw and barrel

Applicationt: 

auto

Production Description:

The bimetallic parallel twin screw and barrel for many kinds of plastic extruder in many specifications.

Abrasion resistant and corrosion resistant

Material:High quality alloy steel

           1)38CrMoAlA

           2)42CrMo

           3)9Cr18MoV

Technics:1)Heat-treatment

              2)Nitriding treatment

              3)Hard-chrome electroplated

              4)Bimetallic-alloy coating spraying

Technical parameter

Nitriding depth:0.50-0.80mm

Nitriding hardness:900-1000HV

Nitriding brittleness:Less than grade 1

Surface roughtness: Ra0.4

conical twin screw and barrel