Materil: 38CrMoALA
Heat-treatment:
1.Nitriding treatment
2.Electroplated hard-chrome finish
3.High-frequency quenching
4.Spray coating Bimetallic-alloy
Technical specification
| Hardness After Hardening &Tempering: | HB240 -280 |
| Nitrided Hardness: | Hv850-1000 |
| Nitrided Depth: | 0.45-0.7mm |
| Nitrided Brittleness: | ≤Grade 2 |
| Surface Roughness: | Ra0.4 |
| Screw straightness: | 0.015mm |
| Surface Chromate-plating's Hardness After Nitrided: | ≥900Hv |
Screw barrel type and specificalSpecification (d/D) Length (mm) Capacity (Kg/h) Speed (RPM) Φ35/Φ77 810 40-70 5~50 Φ45/Φ90 990 50-80 5~45 Φ50/Φ105 1070 100-150 4~45 Φ51/Φ105 1220 100-150 4~45 Φ55/Φ110 1220 120-180 4~40 Φ60/Φ125 1320 150-200 4~40 Φ65/Φ120 1440 200-250 4~40 Φ65/Φ132 1440 200-250 4~40 Φ70/Φ140 1460 220-300 4~40 Φ75/Φ150 1480 250-320 4~35 Φ80/Φ143 1800 300-360 4~35 Φ80/Φ156 1660 300-360 4~35 Φ92/Φ188 2000 400-500 4~35
Compressing rate of screw can be designed according to different raw materials and products
