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发明授权
US07799415B2 Surface-coated cutting tool with coated film having strength distribution of compressive stress 有权
表面涂层切割工具，具有压应力强度分布的涂膜

Surface-coated cutting tool with coated film having strength distribution of compressive stress
摘要：
A surface-coated cutting tool according to the present invention includes a base material and a coated film formed on the base material. The coated film serves as an outermost layer on the base material and has compressive stress. The compressive stress is varied so as to have strength distribution in a direction of thickness of the coated film. The strength distribution is characterized in that the compressive stress at a surface of the coated film continuously decreases from the surface of the coated film toward a first intermediate point located between the surface of the coated film and a bottom surface of the coated film and the compressive stress attains a relative minimum point at the first intermediate point.
摘要（中）：

根据本发明的表面涂层切削工具包括基材和形成在基材上的涂膜。 涂膜作为基材上的最外层，具有压应力。 压缩应力变化，以便在涂膜的厚度方向上具有强度分布。 强度分布的特征在于，涂膜表面的压缩应力从涂膜的表面朝向位于涂膜表面和涂膜底面之间的第一中间点连续减小，压缩 应力在第一个中间点达到相对最小点。

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