الوصف

Specification: 
Screw Diameter:D**-D**0 
L/D ratio:****6 

Product classification: 
Aiming at different plastic products the screw can be chosen from:general type ,pin type,barrier type,separation type,and vented type etc. 

Base  Materials: 
1.*8CrMoAIA(JIS SACM**5) 
2.*2 CrMo (AISI ***0) 
3.4Cr5MoSiV1(JIS SKD**1) 
4.9Cr*8MoV 
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 treatmen 
High-frequency quenching 
Nitriding treatment 
Hard-chrome electroplating 
Bimetallic alloy  welding 
Bimetallic alloy centrifugal casting 

Technical parameter: 
Nitrided layer depth:0.**0.8mm 
Nitrided hardness:*******0HV 
Nitrided brittleness:less than grade 1 
Surface roughness:Ra0.4 
Linearity of screw:0.**5mm 
Hard-chrome plating hardness after nitriding:>**0HV 
Chrome-plating layer depth:0.****0.**5mm 
Bimetallic layer depth:3mm 

OUR STRENGTH: 
1.offers considerate after-sales service: we have adjustors for your machine if there is any problem with our products. 
2.ISO ***1:***8 approved: you won't worry about the quality of our products, each product will be inspected extremely strictly. 
3.Location advantage: our company is close to NINGBO/SHANGHAI port and located on Zhoushan the screw capital 

ABOUT ZHONGYANG: 
  Our factory manufactured with high-quality material, applying the method of hardening and tempering and nitriding, thus it enjoys the characteristics of long working life, wear resistance, and anti corrosion. Besides, the technique of hard alloy spraying or chrome plating can be used on the working surface of screw, which will make it have better using effectiveness. We can supply screw and barrel for Krauss Maffei ,ShangHai JwellL,CINCINNATI, HaiTian,,we also can make or design screw and barrel according to your requirement. 
            If have interest * *@********************g>