CUTTER

摘要

This invention provides a cutter (1) comprising a cutting edge part (13) with a film (7) of a melted electrode material or a reaction product of the electrode material formed by pulse discharge between an electrode and the cutting edge part (13) in a working fluid or a gas using, as the electrode, a molded product of a powder of one of a metal, a metal compound, and ceramic or a mixed powder composed of a plurality of the above materials, or a treated molded product obtained by heat treating the molded product.