Porduct Name: Bimetal barrel screw [back]
Range of universal plastic：Engineering plastic of ABS, PP, PE, PA66, LCP, PA+GF, PET+GF, PBT+GF and PC+GF added glass fiber.
Machining dimension：from minimum screw Φ15 to super large screw Φ350, upper limit length 8000mm.
Surface roughness：Ra0.4um
Screw straightness：0.015mm
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Screw base metal
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Anti-stretching (Kgf/mm2)
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Elasticity modulus (Kgf/mm2)
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Percent of elongation (%)
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Fatigue limit (Kgf/mm2)
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Hardness（Hv）
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38CrMOALA
(SACM645)
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90
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19000
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14
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30.2
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950-1020
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Screw alloy
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Anti-stretching (Kgf/mm2)
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Elasticity modulus (Kgf/mm2)
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Percent of elongation (%)
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Fatigue limit (Kgf/mm2)
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Hardness（Hv）
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Stellite alloy
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90
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19000
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2.5
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----
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58-65
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With one layer 2-3mm wear-and corrosion-resistant, high temperature resistant alloy is cast on inner wall, the bimetal barrel has longer effective service life than common nitriding barrel, and has obvious bimetal advantages on machining glass fiber engineering plastic, fluorine plastic, polysulfone and PPO special type.
Hongfa screw barrel uses high quality alloy powder of ASSBA or Stellite to spray weld alloy on screw gap. Depending on screw with different functions, we will use high temperature centrifugal casting or different matching and welding modes.