Abstract:
Coated cutting tools can provide immense benefit to the machining industry by
providing longer tool life, higher productivity and improved product quality. Ideally
the coating should have good adhesion with the substrate, be chemically inert, have
hot hardness and possess excellent anti-friction property.
MoS2 is considered to be an excellent solid lubricant coating, but its application is
restricted to vacuum environment as it degrades under high humidity and possesses
rather low hardness. TiN, on the other hand, is one of the most widely used hard
coatings for cutting tools. It also shows resistance to oxidation at elevated
temperature. Since it is difficult to find any single material having all of these
properties, one may follow the route of composite coating.
