MACHINING TOOL AND METHOD OF PRODUCING THE SAME

摘要

A machining surface of a machining tool such as a drill (10) is composed of a metal-rich section (22). A ceramics-rich section (20) is formed centrally in the drill (10). Further, a gradient section (24) is provided between the ceramics-rich section (20) and the metal-rich section (22). In the gradient section (24), the composition ratio of metal is gradually increased from the ceramics-rich section (20) to the metal-rich section (22). That is, the drill (10) is composed of the gradient composite material in which the composition ratio of ceramics is increased and the composition ratio of metal is decreased inwardly from the machining surface.