Surface WC/CO overall spray welding can effectively improve the service life of the screw. There are gradient type, mutant type, wave type, barrier type, dual screen type, split type, separate type, exhaust type, pin type, hybrid type, double head type, triple head type, multiple head type, granulation type and so on.
Diameter：Ф16-Ф300
Length/Diameter Ratio：L/D=15-40
Technical Indexes
1 Commonly used materials:38crMoAIA，nitriding treatment，surface hardness。HV≥900 Depth of nitration case：0.5-0.8mm
2 Commonly used materials:Surface WC/CO overall spray welding, can effectively improve the service life of the screw.
Screw type：
Gradual , saltain, wave, screen, double screen,taper,distribntary,saparating,exausting dowel,mixed smelting,double screws,three screws,more screws,granulating etc.
