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    DIAMOND COATED CEMENTED CARBIDE CUTTING TOOL
    15.
    发明公开
    DIAMOND COATED CEMENTED CARBIDE CUTTING TOOL 审中-公开

    公开(公告)号：EP3603857A1

    公开(公告)日：2020-02-05

    申请号：EP18770701.3

    申请日：2018-03-22

    申请人： Mitsubishi Materials Corporation

    发明人： SHIKADA, Shinichi ,  TOMINAGA, Akimitsu ,  TAKASHIMA, Hideaki

    IPC分类号： B23B27/14 ,  B23B27/20 ,  B23B51/00 ,  B23C5/16 ,  C01B32/26 ,  C23C16/27

    摘要： In this diamond-coated cemented carbide cutting tool, (1) an average particle size of WC particles is 0.5 to 0.9 µm, (2) (R z ) being 0.5 to 1.0 µm, a maximum distance between the concave and convex (Δ) is 0.5 to 1.5 µm, a length (Y e ) is 0.5 to 2.0 µm, (3) a sum of areas of WC particles, which satisfies (L 1 ) being 0.4 to 0.8 µm, (L 2 ) being 0.2 to 0.4 µm, and (L 1 )/(L 2 ) being 1.5 to 2.5, is 70 area% or more, (4) an average grain size of diamond crystals in a region of 0.5 to 1.5 µm from the body interface is 0.1 to 0.3 µm, and (5) columnar crystals satisfying at least one of: a ratio of crystals, which has a growth direction shifted in 10 degrees or less from the diamond film thickness direction, being 90% or more; or an orientation ratio of being 30 to 70%.