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SURFACE COATED CUTTING TOOL WITH HARD COATING LAYER EXHIBITING EXCELLENT WELDING RESISTANCE, PLASTIC DEFORMATION RESISTANCE AND ABNORMAL DAMAGE RESISTANCE
SURFACE COATED CUTTING TOOL WITH HARD COATING LAYER EXHIBITING EXCELLENT WELDING RESISTANCE, PLASTIC DEFORMATION RESISTANCE AND ABNORMAL DAMAGE RESISTANCE
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机译：具有硬涂层的表面涂层切削工具，具有出色的耐焊接性，塑性变形抗性和异常损伤性
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摘要
To provide a surface coated cutting tool which exhibits excellent welding resistance, plastic deformation resistance, and abnormal damage resistance.SOLUTION: A surface coated cutting tool has a composite carbonitride layer, which contains a trace amount of chlorine and (TiZrHf)(NC)(0.10≤x≤0.90, 0y≤1.0, 0.08z0.60), on a tool base body surface. A ZrHf content ratio and a C content ratio periodically change, a cycle interval between a ZrHf maximum content point and an adjacent ZrHf minimum content point and a cycle interval between a maximum C content point and an adjacent minimum C content point are 5 to 100nm, and an average value of content ratio differences Δx(=x-x) and Δz(=z-z) is 0.02 or more. The tool has a hard coating layer in which a distance between the maximum ZrHf content point and the maximum C content point at the nearest position is 1/5 or less of an interval between the adjacent maximum content point and minimum content point of a ZrHf component, and which has a compositionally variable structure in an area ratio of 10% or more.SELECTED DRAWING: Figure 1
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