抄録
Three sorts of Al2O3-25 vol% TiC ceramics having different grain sizes were prepared by hot-pressing and cutting performance of the ceramics tools was studied as a function of Al2O3 grain size. The results obtained were briefly summarized as follows; The fine grained tools showed the largest flank wear (VB) in turning test of grey cast iron, but on the other hand, they showed the smallest VB in the test of alloyed tool steel. The coarse grained tools often exhibited a shorten life time due to flaking.
Discussion on the VB which had a reverse tendency in relation to the sorts of works and flaking mechanism was finely given.
