| 摘要 |
PROBLEM TO BE SOLVED: To provide a coated cutting tool which is capable of improving high hardness unique to Si-containing coating and oxidation resistance and attaining high toughness and high chipping resistance, and which is optimum to high-speed cutting. SOLUTION: In this coated cutting tool, which includes elements selected from one or more types of metal elements of 4-, 5-, and 6-group and Al in a cutting tool body and which is covered with the Si-containing coating including elements selected from one or more types of metal elements of at least N, B, C, and O as nonmetal elements, the coating comprises a phase having a high Si concentration region and a low Si concentration region in the same phase.
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