Specifications:

 

Screw diameter: Φ 45mm - Φ 200mm

 

Aspect ratio: 16-35

 

Screw compression ratio can be designed according to different products and different formulations

 

 

 

Substrate 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

 

Screw straightness: 0.015mm