SELF-SHARPENING CUTTING TOOL WITH HARD COATING

摘要

There is disclosed a cutting tool having a blade coated on one side with a hard coating having a laminar or layered microstructure. The coating tends t o wear evenly and smoothly, thereby keeping a cutting edge of the cutting tool smooth. Furthermore, by coating the cutting edge on one side only, the cutti ng edge becomes self-sharpening. The coating preferably includes at least one layer made of tungsten carbides substantially or entirely free of metallic tungsten.