| 摘要 |
Provided is a coated tool which is wear-resistant and damage resistant, and which has a long service life. This coated tool comprises a base material and a coating layer. The base material comprises a plurality of hard particles and a bonding phase that bonds the plurality of hard particles. The coating layer contains a compound layer. The ratio B/A determined by procedures (1) to (6) is at least 0.2 but less than 0.5. (1) A cross section perpendicular to the surface of the base material is extracted along a reference length (S) in a direction parallel to the surface of the base material. (2) In the cross section thus extracted, the total area (A) of the cross section of hard particles that touch the coating layer is determined. (3) At the interface between the coating layer and the base material, of the plurality of interface parts that are formed between adjoining hard particles, the first interface part (D1) which is at the deepest position, and the second interface part (D2) which is at the second deepest position, are determined. (4) A line (L) is drawn to pass through D1 and D2. (5) In the cross section of the hard particles which touch the coating layer, the total area (B) of the cross section that is on the coating layer side of the line (L) is determined. (6) The value for B/A is calculated. |
