| 摘要 |
A surface-coated tool (100) is provided with a base material (101), and a coating film (110) that is formed on the base material (101). The coating film (110) includes an alternating layer (112) wherein one or more A layers (112a) and one or more B layers (112b) are alternately laminated. The thickness of each of the A layers (112a) and the thickness of each of the B layers (112b) are 2-100 nm. The average composition of the A layers (112a) is expressed by formula of TiaAlbSicN (0.5<a<0.8, 0.2<b<0.4, 0.01<c<0.1, a+b+c=1), and the average composition of the B layers (112b) is expressed by formula of TidAleSifN (0.4<d<0.6, 0.3<e<0.7, 0.01<f<0.1, d+e+f=1), and formulae of 0.05<a-d≤0.2 and 0.05<e-b≤0.2 are satisfied. |
