Diamond film for cutting-tools

摘要

There is provided a diamond film for cutting-tools which has high toughness, excellent adhesiveness, high hardness, and in which tool service life is considerably improved in relation to cutting ultra-hard alloys and other very hard work materials. A diamond film for cutting-tools formed on a base material, in which at least one or more multilayered film layers [A] are included in which the layers are constituted by layering a film layer [±] having a film thickness of 1 µm or more and 15 µm or less and a film layer [²] having a film thickness of 1 µm or more and 20 µm or less so that the film layer [±] is disposed on the base material side and the film layer [²] is disposed on the surface layer side; the film thickness of the entire film body is set to 4 µm or more and 30 µm or less; and the film layer [±] and the film layer [²] have predetermined film compositions.