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发明公开
CN108026629A 切削工具用硬涂层 有权

切削工具用硬涂层
摘要：
本发明的硬涂层通过PVD法在切削工具用基材的表面上形成，所述硬涂层的特征在于包括下述薄膜层，所述薄膜层的总厚度为0.5～10μm，且整体组成为Al1‑a‑bTiaMebN(0.2 kB>kC的关系，其中，kA是薄层A的热膨胀系数，kB是薄层B的热膨胀系数，并且kC是薄层C的热膨胀系数，薄层A的组成为Ti1‑aAlaN(0.3≤a
摘要（英）：

A hard coating according to the present invention is formed on the surface of a base material for a cutting tool by a PVD method, and the hard coating is characterized by including a thin film layer which has a total thickness of 0.5-10 [mu]m and has an overall composition of Al1-a-bTiaMebN (0.2kB>kC (kA is the thermal expansion coefficient of thin layer A, kB is the thermal expansion coefficient of thin layer B, and kC is the thermal expansion coefficient of thin layer C), thin layer A has a composition of Ti1-aAlaN (0.3<=a<0.7), thin layer B has a composition of Ti1-y-zAlyMezN(0.3<=x<0.7, 0.01<=z<0.5), and thin layer C has a composition of Al1-xTixN (0.3<=y<0.7).

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