Description
| Specification: ∅15-300mm | |
| According to different products and formulations to design screw structure and compression ratio. | |
| Steel Material | Heat Treatment |
| High Quality Alloy Steel | |
| 1)38CrMoAlA(SACM645) |
Nitriding Treatment or Bimetallic Treatment(Spray alloy power on the screw's flights) or WC-Co coated on the surface of screw |
| 2)42CrMo(SCM440) | Hardchrome Plating |
| 3)SKD61 | Vacuum Quenching |
| 4)9Cr18MoV | High Frequency Quenching |
| 5)GH113 | Natural Harden after High Temperature |
| Technical Parameters | |
| Tempering Hardness: HB280-HB300 | Chrome Plating Thickness: 0.025-0.1mm |
| Nitriding Hardness: HV900-HV1100 | Chrome Plating Hardness: ≧HV900 |
| Nitriding Thickness: 0.5-0.8mm | Bimetallic Alloy Depth: 1.5-2mm |
| Nitriding Brittleness: 1 Level | Bimetallic Alloy Hardness: HRC58-HRC65 |
| Surface Roughness: ≦Ra0.4 | |
| Screw Straightness: 0.015mm | |
