| 摘要 |
[Problem] To provide a cutting tool: that suppresses peeling at the interface between a TiCN layer and an alphaAl203 layer, even during cutting whereby a large impact is applied to the edge of the blade; and which exhibits stable cutting properties having good abrasion resistance and good defect resistance. [Solution] A coated tool, such as a cutting tool (1) having: a coated layer (6) on the surface of a base (2), including, in order from the base (2) side, at least a TiCN layer (3) and an alphaAl203 layer (4) of an alpha-type Al203 crystal (10); a protrusion (7) comprising a TiCN crystal, formed between the TiCN layer (3) and the alphaAl203 layer (4), from the TiCN layer (3) towards the alphaAl203 layer (4), in the cross-sectional structure of the coated layer (6); and a needle-like crystal (8) comprising a TiCNO crystal, extending from the peak (7a) of the protrusion (7) in a vertical direction relative to the growth direction of the coated layer (6).
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