Our company has not only got the remarkable achievement on the production of normal bimetallic screw and barrel,also we have deeply researched on the barrel and screw for the special engineering plastic,for now much of engineering plastics add the calcium,kaolin,red clay, silica or add Glass fiber, carbon fiber, boron fiber and halogen free plastic to make the original plastic much better to adapt the specific plastic products.On the other hand, it may make the screw and barrel wear and corrosion quickly, In order to solve this problem,we have invented a kind of special alloy powder,whose ingredient contains 25%~50% Wc tungsten carbide.It makes the service life of screw and barrel much more longer than the other kinds of bimetallic screws and barrels. 
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material
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Grade A Wc-10 tungsten carbide alloy
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Processing range
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Inner diameter : φ16mm-φ450mm ,effective length to 9000mm
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Processing technic
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Centrifugal casting,alloy layer reach 1.5mm-2mm one side,maximum reach 3mm-6mm one side
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Alloy powder composition
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Wc(50%-60%),C,Si,Cr,B,Ni,Mo,Co,etc
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The index of hardness
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HRC62-65,the service life of 5-6 times longer than the nitrided one
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Characteristics of alloy powder
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High wearing resistance,high corrosion resistance and high temperature resistance
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Apply to
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Nylon plus 30% - 50% glass fiber, bakelite, magnetic powder, ceramic powder, aluminum magnesium powder, iron powder, LCP and halogen-free flame retardant plastic
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material
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Grade B Ni-20 Ni-based alloy
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Processing range
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Inner diameter : φ16mm-φ450mm ,effective length to 9000mm
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Processing technic
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Centrifugal casting,alloy layer reach 1.5mm-2mm one side,maximum reach 3mm-6mm one side
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Alloy powder composition
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Ni,C,Si,Cr,B,Mo,Co,Wc(20%-25%),etc
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The index of hardness
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HRC60-63,the service life of 4-5 times longer than the nitrided one
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Characteristics of alloy powder
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High corrosion resistance,high wearing resistance and high temperature resistance
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Apply to
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PE, PC, PVC, LCP, acrylic, transparent plastic, halogen free flame retardant plastic, corrosion resistance of resin plastic, etc
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material
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Grade C Fe-30 Fe-based alloy
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Processing range
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Inner diameter : φ16mm-φ450mm ,effective length to 9000mm
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Processing technic
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Centrifugal casting,alloy layer reach 1.5mm-2mm one side,maximum reach 3mm-6mm one side
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Alloy powder composition
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Fe,C,Si,Cr,B,Mo,Ni, Co,etc
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The index of hardness
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HRC59-61,the service life of 3-5 times longer than the nitrided one
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Characteristics of alloy powder
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Wearing and corrosion resistance
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Apply to
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Nylon plus 10% -30% glass fiber, PC plus glass fiber, PVC plus calcium powder, recycled plastics processing, etc
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