Conical twin screw and barrel for bimetallic treatment
Heat-Treatment
Nitriding treatment
Spray bimetallic coating
Quideline of technique:
Depth of nitration layer:0.05-0.08mm
Hardness of nitration:900-1000V
Fragility of nitration:less than grand one
Roughness of the surface:Ra0.4
Linearity of the screw:0.015mm/m
The surface hardness of chrom plating after nitrogention:more than 950hv
Chrome-plating layer thickness:0.025-0.085mm
DATA:
| Specification(d/D) |
| Ф45/Ф90 |
| Ф45/Ф100 |
| Ф51/Ф105 |
| Ф55/Ф110 |
| Ф58/Ф124 |
| Ф60/Ф125 |
| Ф65/Ф120 |
| Ф65/Ф132 |
| Ф68/Ф143 |
| Ф75/Ф150 |
| Ф80/Ф143 |
| Ф80/Ф156 |
| Ф80/Ф172 |
| Ф92/Ф188 |
| Ф105/Ф216 |
| Ф110/Ф220 |

