Abstract
The Al2O3-TiC ceramics tools having 10-50 mass% TiC and different grain size were prepared by hot-pressing and the cutting performance of the tools were studied. The results obtained were briefly summarized as follows; The flank wear in turning tests of grey cast iron became smaller with decreasing TiC content and coarser TiC grain size, and that in the tests of ductile cast iron became smaller with increasing TiC content in no relation to TiC grain size. The tool having 20-30 mass%TiC and finer TiC grain size showed a superior resistance to flaking and an optimum cutting performance in turning test of alloyed tool steel. Discussion on flaking mechanism and the flank wear being different according to the kinds of works was given.
