Zhoushan Zhongyang Screw Manufacturing Co., Ltd. [China]

Detailed Product Description

We are a professional manufacturer of screw&barrel which has been in the line for 6 years,we can make all kinds of screw&barrel according to your requirments.

The conical twin-screw&barrel for extruder in specifications of Dia.35-92MM

Abrasion resistant and corrosion resistant.

Material:High quality alloy steel

           1)38CrMoAlA

           2)9Cr18MoV

Technics:1)Heat-treatment

              2)Nitriding treatment

              3)Spray bimetallic-alloy coating

Technical parameter

Nitriding depth:0.50-0.80mm

Nitriding hardness:900-1000HV

Nitriding brittleness:Less than grade 1

Surface roughness:Ra0.4

Linearity of the screw:0.015mm

Hardness of the chrome plating after nitriding:More than 950HV

Chrome plating thickness:0.025-0.085mm