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What is the Bimetallic Cylinder？ |
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The Bimetallic cylinder consists of
a general base material and an armoured
layer which is homogeneously attached
to the base material on inner diameter
surface. It has an certain thickness and certain hardness. This layer is an or wear-resistant
alloy, or corrosion-resistant alloy, or both functions. This armouring layer is locked
on base material in metallographic structure. These two kinds of material take different
functions in hand, but form an uniform whole - The bimetallic cylinder. |
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Three kinds of alloys for bimetallic Cylinder: |
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Characteristic and Property |
α101 Alloy |
α201 Alloy |
α301 Alloy |
Wear resistance |
★★★ |
★★ |
★★★ |
| Corrosion resistance |
★ |
★★★ |
★★★ |
Alloy |
Fe-Ni-B |
Ni-Co-Cr-B |
Fe- Cr-Ni-B Carbide |
Hardness(HRC) |
58~64 |
50~56 |
58~65 |
Strain to fracture (%) |
0.30 |
0.24 |
0.20 |
Modulus of elasticity ( kgf / mm ) |
18600 |
215000 |
22000 |
Cofficient
thermal
Expansion (/℃)
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15℃~250℃ |
10.0×10 |
11.9×10 |
11.2×10 |
15℃~400℃ |
10.5×10 |
12.6×10 |
11.9×10 |
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Mark as in list：★★★Excellent； ★★Very good,； ★Good |
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ID Precision of bimetallic Cylinder |
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Surface roughness |
Ra 0.8（0.4~1.6S） |
（L/D=25）
Straightness |
ID（mm） |
Straightness |
15~40 |
0.05 |
40~90 |
0.08 |
90~200 |
0.10 |
| ID Tolerance |
H7 |
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Manufacturing range of bimetallic Cylinder |
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Outer diameter |
Inner diameter |
Length |
Maximum |
450 mm |
350 mm |
5000 mm |
Minimum |
80 mm |
22 mm |
300 mm |
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| If outside the above size range, please contact us.。 |
