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Anti-corrosion Screw Barrel
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Ningbo Cowell Industry Co.,Ltd.
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Product description
Anti-corrosion screw barrel
Specification:
For screw: Dia. 15-300 mm Length 300-9000 mm L/D ratio: 15-50
Fro barrel: Dia. 30-500 mm Length 300-8000 mm
Material Available:
Technical Index
Specification:
For screw: Dia. 15-300 mm Length 300-9000 mm L/D ratio: 15-50
Fro barrel: Dia. 30-500 mm Length 300-8000 mm
Material Available:
| Nitriding Steel: | 42CrMo, 38CrMoALA, etc |
| Cool work steel: | D2, SKD61, 9Cr18MoV etc. |
| Heat resistant steel: | SKH51, GH113 etc. |
Technical Index
Steel Material |
38CrMoALA,SKD61.,D2 etc. |
Hardness after Hardening&Termpering |
HB240-280 |
Nitriding Treatment |
≥ 96 hours |
Surface Hardness |
58-64 HRC |
Nitrided layer depth |
0.5-0.8mm |
Surface Roughness |
Ra0.4 |
Screw Straightness |
0.015mm |
Chromium-Plated Surface Hardness after nitriding |
≥900HB |
Chromium-Plating Layer Thickness |
0.05-0.10 mm |
Bimetallic Layer Hardness |
50-65 HRC |
Depth of Alloy Layer |
0.8-2.0 mm |
| Grade | Material | Process |
| Standard grade | 38CrMoAlA | Nitriding 96 hours |
| Bimetallic grade | 38CrMoAlA | HP/HVOF |
| TC-A grade | Tungsten carbide 40% | Centrifugal casting |
| TC-B grade | Tungsten carbide 25% | Centrifugal casting |
| TC-C grade | Tungsten carbide 10% | Centrifugal casting |
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