
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 | |||||||||||
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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 | ||
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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 | 67 - 69 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 | |
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Method of coating | Material |
PVD | TiN - TiCN - CrN |
HVOF | WC-Co-Cr ( Ceramic ) |
HVOF | WC-Co ( Tungsten carbide ) |
Galvanic chrome plating | Cr |