Ti(C,N)계 서메트 공구의 조성변화에 따른 절삭성능 및 신뢰도 분석

When WC and group Ⅳ elements are added to Ti(C,N)-Ni cermet, microstructures of the cermet is changed. The change effects directly on the property of the material. In this study, the amount of WC and group Ⅳ elements of Ti(C,N) cermet tool was investigated. The composition of WC was changed from 5 to 20wt% to determine the effect of WC on the cutting performance of cermet tool. The more WC was added. the longer the tool life of the cermet tool was. The cermet with I wt% ZrC and 14wt% WC showed the best cutting performance among the investigated cermet tools. The cutting performance of cermet cutting tools suggests the possibility in interrupted cutting for reliability test, experimentation was performed repeatedly with Ti(C_0.7,N_0.3)-14WC-1ZrC-20Ni cermet tool machining SCM440. The flank wear of cermet cutting tool at given time condition is suitable for Normal distribution and Log normal distribution by Chi squared test.