Specification:
Rubber pin screw barrel diameter: Φ75mm-φ200mm
Rubber cold, hot feed screw barrel diameter: Φ30mm-φ300 mm
Aspect ratio: 12-18
Base material:
1) 38CrMoAlA(JIS SACM645)
2) 42CrMo(AISI 4140)
3) 4Cr5MoSi V1 (JIS SKD-61)
Process:
Heat treatment
Nitriding treatment
Technical Parameters:
Nitriding depth: 0.50mm-0.80mm
Nitriding hardness: 900-1000HV
Nitriding: <= Level 1
Surface roughness: Ra 0.4
Screw straightness: 0.015mm
The hardness of the surface after chrome plating:≥950HV
Chromium layer thickness: 0.025~0.085mm
Double alloy depth: 3mm