Parallel twin-screw barrel
Screw diameter: 50mm -290mm
Length to diameter ratio: 16-35
Specification: Φ 50/2 (2 represents twin-screw), Φ65/2，Φ80/2，Φ90/2，Φ105/2，Φ125/2，Φ130/2，Φ150/2，Φ180/2，Φ200/2
The screw compression ratio can be designed according to different products and formulas

Substrate and process
1) High quality 38CrMoAlA (JIS SACM645), 42CrMo (AISI 4140), 4Cr5MoSi V1 (JIS SKD-61), etc
2) High quality powder metallurgy materials
3) Cold, hot, corrosion-resistant, wear-resistant spray hard metal process
4) Advanced nitriding process

Technical Parameter：
Tempered hardness: HB260-290 °
Nitriding hardness: HV900-1100HV
Nitriding depth: 0.50mm-0.80mm
Nitriding brittleness: ≤ Level 1
Surface roughness: Ra 0.4
Screw straightness: 0.015mm
Hardness of surface chrome plating after nitriding: ≥ 900HV
Chrome plating thickness: 0.05-0.10mm
Dual alloy hardness: HRC56-70
Dual alloy depth: 0.8-2.0mm