SURFACE COATED CUTTING TOOL

• Main Authors: YANAGISAWA MITSUAKI, HONMA HISASHI
• Format: Patent
• Language: English; Japanese
• Published: 13.10.2023
• Subjects: BORING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MILLING; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TURNING

To provide a coated tool with superior abrasion resistance in high-speed intermittent cutting.SOLUTION: A coated tool includes one or more laminate layers of a surface side TiAlCN main body layer and a substrate side TiCN layer, in which the TiAlCN main body layer contains hexagonal crystal TiAlCN grains by 70-99 area% and cubic crystal TiCN grains by at least 1 area% but less than 5 area%, and in which the TiAlCN grains are (Ti1-xAlx)(CyN1-y)(an average value of x is 0.60-0.95, an average value of y is 0.0050-0.3500). The TiCN layer contains cubic crystal grains. In the coated tool, at a minimal thickness L1min and a maximal thickness L1max of the TiAlCN main body layer, and at a minimal thickness L2min and a maximal thickness L2max of the TiCN layer, L1min is 0.5 μm or more, and L1max is 5.0 μm or less, L2min is 1.0 μm or more, and L2max is 19.0 μm or less. A total thickness L1* of the TiAlCN main body layer and a total thickness L2* of the TiCN layer satisfy L1*+L2*=1.5-20.0 μm, and 0.05×L2*≤L1*≤L2* in the coated tool.SELECTED DRAWING: Figure 1 【課題】高速断続切削加工で耐摩耗性が優れる被覆工具の提供。【解決手段】表面側ＴｉＡｌＣＮ主体層と基体側ＴｉＣＮ層の積層体層が１以上で、ＴｉＡｌＣＮ主体層は六方晶ＴｉＡｌＣＮ粒を７０～９９面積％、立方晶ＴｉＣＮ粒を１面積％以上５面積％未満含み、ＴｉＡｌＣＮ粒は、（Ｔｉ１－ｘＡｌｘ）（ＣｙＮ１－ｙ）（ｘの平均値が０．６０～０．９５、ｙの平均値が０．００５０～０．３５００）で、ＴｉＣＮ層は立方晶の粒を有し、ＴｉＡｌＣＮ主体層の最小厚Ｌ１ｍｉｎと最大厚Ｌ１ｍａｘ、ＴｉＣＮ層の最小厚Ｌ２ｍｉｎと最大厚Ｌ２ｍａｘにおいてＬ１ｍｉｎが０.５μｍ以上、Ｌ１ｍａｘが５．０μｍ以下、Ｌ２ｍｉｎが１．０μｍ以上、Ｌ２ｍａｘが１９．０μｍ以下で、ＴｉＡｌＣＮ主体層の合計厚Ｌ１*、ＴｉＣＮ層の合計厚Ｌ２*がＬ１*+Ｌ２*＝１.５～２０．０μｍ、０．０５×Ｌ２*≦Ｌ１*≦Ｌ２*の被覆工具【選択図】図１