HC7, ZC4, ZC7
These types of black ceramics consist of properly proportioned
aluminum oxide and titanium carbide (Al2O3-TiC)
sintered under pressure. The resulting products are stable over
a vast range of machining conditions. The HC2 is ceramics of generic use. HC7 is a extra grade ceramic for turning and steel mills in materials of high hardness.
With a gold covering, the ZC4/ZC7 grades has a finer grain structure which is best suited for hard turning versus CBN applications.
General turning and boring of gray cast iron.
Turning of hard materials (under HRC65).