Al₂O₃-SiCセラミックス工具の切削性能

抄録

The cutting performance (flank wear V_B, flank notch wear V_N) of Al₂O₃-25 vol%SiC ceramics tool for such works as cast iron (FC35), steel (S48C) and Inconel 600 was examined in comparison with that of Al₂O₃-25 vol%TiC and Al₂O₃-30 vol%SiC whisker ceramics tools. The results obtained were briefly summarized as follows: The Al₂O₃-TiC ceramics tool showed the smallest V_B and largest V_N for Inconel 600, among three sorts of tools, reflecting the difference of the reactivity between TiC and SiC to the works and that of the resistance to oxidation between TiC and SiC contained ceramics, rspectively. Comparing Al₂O₃-SiC ceramics tool to Al₂O₃-SiC whisker one in cutting tests of Inconel 600, V_B and V_N of the former were somewhat smaller and larger, respectively. The phenomenon was explained by the fact that, in the SiC whisker contained tool, the reactivity on the works was enhanced, but abrasive wear at flank notch was checked, owing to the anisotropic array of whiskers like sticking the flank surface from inside.