| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface-coated cutting tool with a rigid coating layer exhibiting excellent chipping resistance, defect resistance, and abrasion resistance in high-speed intermittent cutting.SOLUTION: In a surface-coated cutting tool, a Ti compound layer as the lower layer with a vapor deposition formation of a rigid coating layer where an α type AlOas the first AlOlayer, a Ti compound layer as the fragmentation layer, and an α type AlOlayer as the second AlOlayer are piled up in order, regarding α type AlOcrystal grains of the first AlOlayer and the second AlOlayer, when the normal line of an angle of inclination a (0001) plane of the crystal grain makes is measured with respect to the normal line of the surface of a tool base body to each prepare an inclination angle degree distribution graph, the first AlOlayer has a degree rate at which α type AlOcrystal grains with an inclination angle in a range of 0-15 degrees are present in the inclination angle section by 50% or more, and the second AlOlayer has a degree rate at which α type AlOcrystal grains with an inclination angle in a range of 30-45 degrees are present in the inclination angle section by 50% or more.SELECTED DRAWING: Figure 1 |
