| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface coated cutting tool having superior stability at high temperatures, and extending a tool service life by suppressing chipping at a cutting edge. SOLUTION: This cutting tool includes a base material, and a coating layer formed on a surface of the base material. The coating layer includes one or more layers of an A layer and a B layer laminated alternately. The A layer is made of nitride containing Al and Cr, and a ratio of atomicity of Cr is >0 and≤0.4 when a total number of metal atoms composing the A layer is taken as 1. The B layer is made of nitride containing Cr and Si, and a ratio of atomicity of Si is≥0.05 and≤0.3 when a total number of metal atoms composing the B layer is taken as 1. COPYRIGHT: (C)2009,JPO&INPIT
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