BeSt coating need the exact specification of the tungsten carbide?
[Answer] The binder, contained in the tungsten carbide (generally cobalt or nickel) hinders the growth of pure diamond and transforms the deposited diamond into the graphite phase respectively. Therefore it is necessary to remove these elements from the tools zone which is close to the surface. This depletion layer is different for each tungsten carbide, depending on the composition. In order to guarantee an optimal diamond coating, the cobalt-free zone should be neither to large (in order not to make the tungsten carbide brittle) nor to small (in order not to interfere with the diamond growth). Therefore the exact amount of all elements (especially cobalt) must be known. Due to many years of development, r-BeSt coating is even able to coat tungsten carbide grades with a high cobalt content (up to 20%) as standard and therefore stands out from the competitors.
