Product overview：
Specifications:
Screw diameter: Φ 45mm - φ 200mm
Length diameter ratio: 16-35
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)
Treatment process:
heat treatment
Nitriding treatment
Technical parameters:
Nitriding depth: 0.50mm-0.80mm
Nitriding hardness: 900-1000hv
Nitriding brittleness: < grade 1
Surface roughness: RA 0.4
Straightness of screw: 0.015mm
