Diamant-beschichtete bzw. mit diamantartigem Kohlenstoff beschichtete Hartstoffe

摘要

A diamond-coated hard material having a diamond- or diamond-like carbon coated layer with a high bonding strength to a substrate is provided. The coated hard material comprising a diamond- and/or diamond-like carbon-coating layer formed on the surface of a hard material, i.e. substrate is characterized in that (I) (1) microscopic roughness is present on the surface of the substrate and (2) protrusive parts thereof are defined by the surface roughness Rmax within a range of 1.0 to 30 mu m in a standard length when the standard length is 50 mu m in the interface of the diamond- and/or diamond-like carbon coated layer and the substrate, and (II) (1) microscopic roughness is present on the surface of the substrate, (2) at least one protrusive part is present in a standard length when the standard length is 10 mu m in the interface of the diamond- and/or diamond-like carbon coated layer and the substrate, (3) the ratio of the sum A of the lenghts of dent parts to the sum B of the lenghts of the protrusions is in the rangeof 0.05