Twin Parallel
In the section extrusion screws and barrels we also have the parallel twin-screw.
Technological content the Parallel twin-screw characterizes Euroviti. Since its foundation, in 1992, has the capacity to produce the cylinder twin-barrel parallel in carbon steels enriched gas nitriding NT9 (120H)
For years we can produce twin-barrel bimetallic.
| Manufacture of the screws | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Denomination | C | Si | Mn | P | S | Al | Cr | Mo | Ni | V | W |
| EUV 31 | 0,34 | 0,70 | 0,40 max | 0,025 max | 0,030 max | 1,30 | 2,70 | 0,25 | - | 0,20 | - |
| Coating on screws | ||
|---|---|---|
| Alloy | Denomination | Hardness |
| 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 ) | EUV 850 | 48 - 59 HRC |
| Molibdeno | EUV 700 | 59 - 60 HRC |
| Manufacture of the bimetalic barrels | ||||
|---|---|---|---|---|
| Denomination | Base | Alloy | Hardness | Usura / Resistenza |
| EUV400 | Fe/Cr | Ni.Mo.Cu.C.B. | 64 - 69 HRC | Wear and corrosion resistance |
| EUV1000W | Ni lega | Cr.Si.B.WC. | 58 - 66 HRC | Excellent wear and corrosion resistent |
| EUV 34 ( Nitriding steel ) | Fe | 900 ÷ 1000 HV | ||
| EUV 41 ( Nitriding steel ) | Fe | 950 ÷ 1100 HV |
| Rivestimenti superficiali | |
|---|---|
| Method of coating | Material |
| PVD | TiN - TiCN - CrN |
| HVOF | WC-Co-Cr ( Ceramic ) |
| HVOF | WC-Co ( Tungsten carbide ) |
| Galvanic chrome plating | Cr |
