| abstract |
The surface-coated cutting tool according to the present invention is a surface-coated cutting tool comprising a base material and a film covering the base material, the film comprising a hard film layer comprising a domain region and a matrix region, and the The domain region is divided into a plurality of parts in the matrix region and is present in a dispersed state, and the domain region comprises a first layer and a second Al containing a first Al x1 Ti (1-x1) compound. A second layer containing an x2 Ti (1-x2) compound has a structure in which a second layer is stacked on each other, and the matrix region includes a third layer containing a third Al x3 Ti (1-x3) compound and a fourth Al x4 Ti The fourth layer containing the (1-x4) compound has a structure in which a fourth layer is stacked on each other, the first AlTi compound has a hexagonal crystal structure, and the second AlTi compound has a cubic crystal structure, wherein The third AlTi compound has a hexagonal crystal structure, and the fourth AlTi compound has a cubic crystal structure, wherein x1 is 0.89 or more and 0.97 or less, and x2 is 0.5 or more and 0.61 or less, and x3 Silver is 0.86 or more and 0.95 or less, and x4 is a surface-coated cutting tool that is 0.5 or more and 0.65 or less. |