Surface-coated cutting tool having excellent chipping resistance and wear resistance
摘要:
In a surface-coated cutting tool, an A layer made of an (Al1-xTix)N layer (0.35≤x≤0.6 by an atom ratio) and a B layer made of a (Al1-y-zTiySiz)N layer (0.35≤y≤0.6 and 0.01≤z≤0.1 by an atom ratio) are layered on a surface of a tool body in which at least a cutting edge is made of a cBN sintered body. A layer thickness ratio of the A layer and the B layer (tB/tA) is 2 to 5, an X-ray diffraction intensity ratio I(200)/I(111) as the entire hard coating layer is more than 3 and 12 or less, a full width at half maximum of a peak of I(200) is 0.3 to 1.0, the IA(200)/IA(111) of the A layer is 2 to 10, and a full width at half maximum of the peak of the IA(200) is 0.3 to 1.0.
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