Method of manufacturing diamond-coated cutting tool inserts

摘要

A method of making a diamond coated insert (310) includes, obtaining a substrate (204) of durable and diamond adherent material having a substantially smooth surface on which is coated a diamond layer (222) using any known CVD technique, and partitioning the diamond covered substrate (204) with a laser beam into multiple inserts (310) with desired geometries. If desired, the insert edges (318a-c) and corners (320a-c) may be thereafter machined or ablated until the desired smoothness and finish are achieved, and a fastening throughbore (324) may be preformed or drilled in the center of each insert (310). The diamond coated inserts (310) as formed have a top surface entirely coated by a surface layer (222) of diamond of a first thickness, and at least one rake face (208) which is not diamond coated beyond the surface layer (222) of diamond.