HPS
High Performance Screw, are owned by Euroviti design screws, produced to improve:
charging rate, plasticizing, mixing, energy saving, reduction of pressure and breakage of the fibers.
- EUV 41 nitrided steel
- EUV 34 nitrided steel
- EUV 79 hardened steel
- EUV 10 powder and hardened steel
- EUV 80 powder and hardened steel
- EUV 90 powder and hardened steel
| Manufacture of the screws | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Denomination | C | Si | Mn | P | S | Al | Cr | Mo | Ni | V | W |
| EUV 41 | 0,45 | 0,50 | 0,80 | 0,03 | 0,035 | 0,80 | 1,80 | 0,40 | - | - | - |
| EUV 34 | 0,37 | 0,40 | 0,70 | 0,025 | 0,03 | 1,20 | 1,80 | 0,25 | 1,15 | - | - |
| EUV 79 | 1,60 | 0,40 | 0,45 | 0,03 | 0,03 | n.p. | 12,0 | 0,80 | n.p. | 1,10 | - |
| EUV 10 | 2,9 | - | 0,50 | - | - | - | 8 | 1,50 | - | - | - |
| EUV 80 | 2,30 | 0,60 | 0,30 | - | - | - | 12,50 | 1,10 | - | 4 | - |
| EUV 90 | 1,90 | 0,70 | 0,90 | - | - | - | 20 | 1 | - | 4 | 0,60 |
| Coating on screws | ||
|---|---|---|
| Alloy | Denomination | Hardness |
| Cobalt Base | EUV 12 | 46-48 HRC |
| Iron Base | EUV 5 | 58-60 HRC |
| Nickel Base | EUV 56 | 52-56 HRC |
| Nickel Base | EUV 60 | 58-60 HRC |
| Nickel Base ( Tungsten carbide ) | EUVW 850 | 67-69 HRC |
| Screw coatings | |
|---|---|
| Method of coating | Material |
| PVD | Tin – TiCN – CrN |
| HVOF | WC-CO-CR ( Ceramic ) |
| HVOF | WC-Co ( Tungsten carbide ) |
| Galvanic chrome plating | Cr |
