How to repair the screw of the granulator?

1. The twisted granulator screw should be manufactured based on the actual inner diameter of the barrel, and the deviation of the outer diameter of the new screw should be given according to the normal clearance with the barrel.
2. After the surface of the thread with reduced diameter of the worn screw is treated, wear-resistant alloy is sprayed by thermal spraying, and then ground to size. This method is usually processed and repaired by professional spray painting factories, and the cost is relatively low.
3. Weld wear-resistant alloy on the threaded part of the wear granulator screw. Weld 1-2mm thick according to the degree of screw wear, and then grind the screw to size. This wear-resistant alloy is composed of materials such as C, Cr, Vi, Co, W, and B, which increases the wear and corrosion resistance of the screw. Professional welding factories have high costs for this type of processing, and except for screws with special requirements, they are generally rarely used.
4. The repair of the granulator screw can also be achieved by surface plating with hard chromium. Chromium is also a wear-resistant and corrosion-resistant metal, but the hard chromium layer is relatively easy to peel off.