Specification:
Screw diameter:Φ45mm-Φ200mm
Aspect ratio:16-35
The screw compression ratio can be designed according to different products and different formulations
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