Conical Twin-screw-barrel
Specification parameters:
35/76, 45/90, 45/100, 50/105, 51/105, 55/110, 55/120, 60/125, 65/120,
65/132, 68/143, 70/135,70/140, 75/150, 80/143, 80/156, 92/188,
The above are standard specifications. The product can be customized according to customers requirements.
The screws can be specially designed according to different products and recipes.
Conical Twin-screw-barrel Details
Base material:
1)38CrMoAlA(JIS SACM645)
Material composition analysis：
C: 0.35～0.42 Si: 0.20～0.45 Mn: 0.30～0.60 S: ≤0.035 P: ≤0.035 Cr:1.35～1.65 Al: 0.70～1.10 Ni: ≤0.030 Cu:≤0.030 Mo:0.15～0.25
Treatment process:
Tempering, qualitative treatment
Nitriding process
Spraying alloy
Technical parameters:
Tempering hardness:HB260-290
Nitriding depth: 0.50mm-0.80mm
Nitriding hardness: 900-1000HV
Nitriding brittleness: <= level 1
Surface roughness: Ra 0.32
Screw straightness: 0.015mm
Alloy layer thickness:2-3mm
Alloy layer hardness:HRC58-65
