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    • 8. 发明授权
    • Coated cemented carbide cutting tool
    • 涂层硬质合金刀具
    • US06293739B1
    • 2001-09-25
    • US09423353
    • 1999-11-23
    • Katsuya UchinoAkihiko Ikegaya
    • Katsuya UchinoAkihiko Ikegaya
    • B23B2714
    • C23C30/005Y10T407/26Y10T407/27Y10T428/24975
    • The invention is to prolong the life time of tools dramatically by (1) considerably improving the flaking resistance of the coating layer at the time of cutting, (2) increasing the wear resistance and crater resistance of the coating layer itself, and (3) enhancing the breakage strength of the coating layer in comparison with the conventional coating cutting tools. In order to achieve the object, the coated cemented carbide of the invention has the following structure in the coating layer on the surface of the cemented carbides: The outer layer has an Al2O3 layer practically having an &agr;-type crystal structure. The Al2O3 layer has a region where &agr;-type and &kgr;-type crystal grains coexist in the first row of the crystal grains that grow on the inner layer. In addition to that, the crystal grains of &agr;-Al2O3 in the region include no pores.
    • 本发明是通过(1)大大提高切割时涂层的耐剥落性,(2)提高涂层本身的耐磨性和耐火蚀性,从而显着延长刀具的使用寿命;(3) 与常规的涂层切割工具相比,增强了涂层的断裂强度。 为了实现该目的,本发明的涂覆硬质合金在硬质合金表面的涂层中具有以下结构:外层具有实际上具有α型晶体结构的Al 2 O 3层。 Al 2 O 3层具有在内层上生长的第一排晶粒中的α型和κ型晶粒共存的区域。 除此之外,该区域中的α-Al 2 O 3的晶粒不包括孔。
    • 9. 发明授权
    • Coated hard metal tool
    • 涂硬质工具
    • US6082936A
    • 2000-07-04
    • US871367
    • 1997-06-09
    • Hideki MoriguchiAkihiko Ikegaya
    • Hideki MoriguchiAkihiko Ikegaya
    • B23B27/14B23P15/28C23C30/00
    • B23B27/145B23P15/28C23C30/005B23B2200/242B23B2200/245Y10T407/26Y10T407/27Y10T407/28
    • A coated hard metal tool includes a hard metal base material having an edged part on an insert ridge portion defining a connecting portion between a flank and a rake face, and a coating film applied to a surface of the hard metal base material. The coating film has a surface-treated part on the insert ridge portion. The coating film is so formed that Rc1/(Rs1+d) 1.0, wherein Rs1 represents the radius of curvature of a convex curved surface formed on the boundary between the flank and the edged part on the surface of the hard metal base material, Rc1 represents the radius of curvature of a convex curved surface formed on the boundary between the flank and the surface-treated part, Rs2 represents the radius of curvature of a convex curved surface formed on the boundary between the rake face and the edged part on the surface of the hard metal base material, Rc2 represents the radius of curvature of a convex curved surface formed on the boundary between the rake face and the surface-treated part, and d represents the average thickness of the coating film in a region other than the edged part. According to this structure, a coated hard metal tool having a long life which is improved in wear resistance with no damage on its breakage resistance can be provided.
    • 涂覆的硬金属工具包括硬质金属基材,其具有限定在侧面和前刀面之间的连接部分的插入脊部分上的边缘部分,以及施加到硬质金属基材的表面的涂膜。 涂膜在插入脊部分上具有表面处理部分。 该涂膜形成为Rc1 /(Rs1 + d)<1.0和Rc2 /(Rs2 + d)> 1.0,其中Rs1表示形成在侧面和边缘部分之间的边界上的凸曲面的曲率半径 在硬质金属基材的表面上,Rc1表示形成在侧面和表面处理部分之间的边界上的凸曲面的曲率半径,Rs2表示形成在边界上的凸曲面的曲率半径 在硬质金属基材的表面上的前刀面和边缘部分之间,Rc2表示形成在前刀面和表面处理部之间的边界上的凸曲面的曲率半径,d表示平均厚度 在除了边缘部分之外的区域中的涂膜。 根据该结构,可以提供寿命长的涂层硬质金属工具,其耐磨性提高,其耐破坏性不受损害。