Pin screw, barrel Specifications: Φ75mm- Φ200mm
Hot and cold feed screw specifications: Φ65mm- Φ650mm
Materials and Technology:
1. 38CrMoALA nitriding treatment
Nitriding depth: 0.5-0.8mm, nitriding hardness: HV≥920
2. 42CrMo Plating: induction hardening + plating / double metal plating PTA +
Chrome hardness: ≥HV800, thickness 0.03-0.05mm, roughness Ra0.2um
3. SKD61 quenching, vacuum quenching overall hardening treatment
Hardness index: HRC> 55-58, straightness 0.015mm / m, roughness Ra0.4um
4. 9Cr18Mov vacuum hardening, CNC circular grinding
Hardness index: HRC> 50-55, straightness 0.015mm / m, roughness Ra0.4um