... Production 3.Wear-resistant 4.Bimetallic & Nitrided abs,pvc,pp,pe,pa conical twin screw and barrel We ,Lucheng screw ... alloy steelTechnology: nitrided treatment, alloy coating spraying, heat-treatmentAppliance: PVC, PP, PE, PA, PC, ABS .etcDepth of Nitrated Layer: 0. ... type:1. injection screw barrel, injection Molding screw barrel,screw tips/screw nozzle,2.single screw barrel3. Twin screw barrel4. Twin ...