conical twin screw
Detailed Product Description
The conical twin screw/barrel for extruder in many specifications.
The conical twin screw/barrel Abrasion resistant and corrosion resistant
Material:1)High quality 38CrMoAlA
2)9Cr18MoV
Technics:1)Heat-treatment
2)Nitriding treatment
3)Bimetallic-alloy coating spraying
Technical parameter
Nitriding depth:0.50-0.80mm
Nitriding hardness:900-1000HV
Nitriding brittleness:Less tha grade 1
Surface roughness:Ra0.4
Linearity of the screw:0.015mm
Hardness of the chromium plating after nitriding :more than 950HV
Chrome plating thickness:0.025-0.085