| abstract |
In surface-coated cutting tool of the invention, hard film is formed above by one or two layers, and at least one layer is by meeting average composition formula: (Al 1‑x‑y Cr x Si y )(C z N 1‑z ) Al, Cr, the hard coating layer that the composite nitride layer or composite carbon nitride layer of Si is constituted, wherein, x, y, z is atomic ratio, 0.1≤x≤0.4, 0.01≤y≤0.2, 0≤z≤0.3, the hard coating layer includes by the Non-metallic components and the multiple particles that constitute of metal component less than 10 atom %, the Non-metallic components are selected from C, N, the metal component is selected from Cr, Al, Si, in the multiple particle, Al content is 50 atom % or less, major diameter is less than 0.5 μm in the section vertical with the surface of tool base, and total number of the flaky particles that length-width ratio is 2.0 or more relative to the multiple particle, 90% or more is accounted in the section in terms of number ratio. |