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Processing
Tungsten Carbide
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Tungsten carbide is a hard and brittle
ceramic material which forms a hard cermet (ceramic metal)
when combined with approx. 6 - 10% of cobalt.
Because tungsten
carbide is hard, tough and moreover highly wear-resistant,
this material is used:
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as the base material for drill
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for surface-coating metals
using the gun-spraying method |
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for hardfacing using filler
wires |
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It can withstand
high pressure loads during the cutting process when used for
drilling and forms a highly effective wear-protection layer
when used as a surface coating. Classic fineness demands - dependent
on the manufacture and primary particles - are, for example,
a d50
of 0.5 - 1.5 µm and a d97
of 1.5 - 5 µm. When employed to process tungsten
carbide, the AFG fluidised bed opposed jet mill can be used
for coarse grinding operations, e.g. d97
= 1.5 - 80 µm. The feed size (agglomerates) is <
3 mm.
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1 = Flap valve
2 = Fluidised bed opposed jet mill AFG
3 = Automatic filter
4 = Flap valve
5 = Fan
6 = Control cabinet
A = Feed product
B = End product
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Because of the abrasive quality of tungsten carbide, the product-contact
system components are equipped with wear-protection elements
made of PU. The classifying wheel of the classifier integrated
into the mill is made of a wearproof precision casting.
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