- Bimetallic Cylinder
- Bimetallic Screw
- Bimetallic high-output extruder
- Segment element for twin extruder
- Recycle/Reclaim machine system
- EPE foam sheet production line
Bimetallic Screw
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Bimetallic Screw
What is the bimetallic screw?
There is an armouring layer on the top of screw thread, or on the surface of all over the screw working surface. It has a minimum contact wear ratio then it is running on the inside of cylinder. The base material is one kind of high-strength and weldable, nitridable metal. Between this armouring layer and the base material, there is perfect material bonding. These two kinds of material take different functions in hand, but form an uniform whole - The bimetallic screw.
Three styles of blometallic screw 
- Contact wear ratio between two kinds of metal
Four kinds of alloys for bimetallic screw
| Allow Name | Hardness (HRC) | Properties | ||
| Abration resistant | Corrosion resistant | |||
| FX1 | 38 ~ 42 |  |
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| FX2 | 45 ~ 50 |  |
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| FX3 | 52 ~ 56 |  |
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| FX4 | 58 ~ 60 | |
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| Armouring thickness between 1.0 and 2.0 mm | ||||
Manufacturing range of bimetallic screw
| Screw Diameter | ¢20 ~ ¢400 |
| Screw Length | ≤ 7500 |
Base material of bimetallic barrel and screw
| Base material | Hardness | Tensile stength | Principal application |
| S 45 C (45#) | HS 24 ~ 28 | 40 ~ 50 kg f/mm | Extruder |
| SCM 440 (40Cr) | HS 28 ~ 40 | 65 ~ 80 kg f/mm | Extruder, Injection molding machine |
| SACM 645 (38CrMoAlA) | HS 28 ~ 40 | 70 ~ 80 kg f/mm | Extruder, Injection molding machine |
| SNCM 439 (40CrNiMoA) | HS 35 ~ 45 | 70 ~ 85 kg f/mm | High-pressure injection molding machine |
| SUS 316 (00Cr17Ni14Mo2) | HS 18 ~ 28 | 45 ~ 60 kg f/mm | For corrosion resistant parts |