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    • 7. 发明申请
    • SURFACE-COATED CUTTING TOOL
    • 表面涂层切割工具
    • US20140287210A1
    • 2014-09-25
    • US14241681
    • 2012-08-31
    • Kohei TomitaAkira Osada
    • Kohei TomitaAkira Osada
    • B23B27/14
    • B23B27/14C23C16/0272C23C16/029C23C16/403C23C16/45523C23C28/042C23C28/044Y10T428/24975
    • A surface-coated cutting tool with a hard coating layer exhibiting an excellent flaking and chipping resistance in a high-speed heavy and intermittent cutting is provided. The vapor-deposited hard coating layer has a lower layer (Ti compound layer) and an upper layer (α-type Al2O3 layer). Thirty to 70% of Al2O3 crystal grains directly above the lower layer are oriented to (11-20) plane. Forty-five % or more of all of the Al2O3 crystal grains are oriented to (0001) plane. Preferably, the outermost surface layer of the lower layer is an oxygen-containing TiCN layer having oxygen content of 0.5 to 3 atomic % only within the depth region of 500 nm n. The ratio of the number of Al2O3 crystal grains directly above the outermost surface layer to the number of crystal grains of the Ti carbonitride layer in the outermost surface layer is 0.01 to 0.5 in the interface.
    • 提供了一种在高速重和间歇切割中具有优异的剥离和耐崩裂性的硬涂层的表面涂层切削工具。 气相沉积硬涂层具有下层(Ti化合物层)和上层(α型Al 2 O 3层)。 正下方的30%〜70%的Al 2 O 3晶粒取向为(11-20)面。 所有Al2O3晶粒中的45%以上取向为(0001)面。 优选地,下层的最外表面层仅在500nm n的深度区域内具有氧含量为0.5-3原子%的含氧TiCN层。 在表面最外层的正上方的Al 2 O 3晶粒数与最外层的Ti碳氮化物层的晶粒数的比例在界面中为0.01〜0.5。