초록 ▼

A ceramic cutting tool formed of a TiC-based sintered body contains 40 wt % or more of TiC, and 5 to 40 wt % of SiC whisker uniformly dispersed in the sintered body. The SiC whisker has a diameter of 0.2-1.5 mm2O3, and further sintering aids. Up to 40% by weight of the TiC may be substituted with at

A ceramic cutting tool formed of a TiC-based sintered body contains 40 wt % or more of TiC, and 5 to 40 wt % of SiC whisker uniformly dispersed in the sintered body. The SiC whisker has a diameter of 0.2-1.5 mm2O3, and further sintering aids. Up to 40% by weight of the TiC may be substituted with at least one of Ti, nitrides, oxides and borides of Ti, and solid-solutions of these nitrides, oxides and borides of Ti to form a TiC-base composition. The TiC base composition may be represented by the formula (TiaMb) (CcNdOeBf)g, in which M denotes at least one transition metal element of Groups IVa, Va and VIa according to the International Periodic Table, except Ti; and a+b=1, 0

대표청구항 ▼

A ceramic cutting tool having high impact resistance and high resistance against wear in high speed cutting of difficult to cut materials formed of a polished sintered body consisting essentially of 40% by weight or more of TiC and 5 to 40% by weight of SiC whisker uniformly dispersed in said sinter

A ceramic cutting tool having high impact resistance and high resistance against wear in high speed cutting of difficult to cut materials formed of a polished sintered body consisting essentially of 40% by weight or more of TiC and 5 to 40% by weight of SiC whisker uniformly dispersed in said sintered body, said SiC whisker having a diameter of 0.2-1.5 m1-20 m40% weight or more of TiC and 5 to 40% by weight of SiC whiskers of a length greater than 20 m