Tungsten carbide drill bits are made by powder metallurgy. But how do we introduce conformal cooling channels in this drill bit?
As far as I know the WC teeth are inserted into the drill bit made of low carbon martensitic steel. So no channels are to be made in WC.
For conformal cooling channels in suitable materials, additive manufacturing is a very attractive solution, as there are little restrictions to cooling channel geometries. These can thus be optimized based on thermal performance without having to care for many of the restrictions imposed by conventional processes in terms of manufacturable geometries. For rapid tooling applications, such things have been studied e. g. at Fraunhofer IFAM.
With polimers "wire" put into the powder. This wire dissapear during the sintered process.
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