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    • 67. 发明公开
    • CBN CUTTING TOOL MANUFACTURING METHOD AND CBN CUTTING TOOL
    • CNB-SCHNEIDWERKZEUG UND CNB-SCHNEIDWERKZEUG
    • EP2979812A1
    • 2016-02-03
    • EP13880617.9
    • 2013-12-27
    • Sumitomo Electric Hardmetal Corp.
    • WATANOBE, NaokiOKAMURA, KatsumiYONEKURA, HirokiKOROGI, Yosuke
    • B24B3/34B23B27/14B23B27/20B24B41/06
    • B24B3/34B23B27/145B23B27/18B23B2200/0447B23B2200/049B23B2200/085B23B2200/242B23B2200/283B23B2222/28B23B2226/125Y10T407/24
    • Provided are: a method for manufacturing a cubic boron nitride cutting tool including a base metal and a sintered cubic boron nitride compact at a corner portion of the base metal, the method being capable of improving the accuracy of the center height to a large extent and sufficiently reducing the angle of inclination or the width of a negative rake face; and the cubic boron nitride cutting tool. The method includes grinding the sintered cubic boron nitride compact by pressing the sintered cubic boron nitride compact against an end face of a grindstone of a grinder, whose position and orientation are controllable, to form a flank face and a rake face on the sintered cubic boron nitride compact while the base metal of the cubic boron nitride cutting tool is tightly held by a chuck of the grinder. The grinding is performed in such a manner that the sintered cubic boron nitride compact is substantially ground. In the grinding to form the rake face, the rake face is formed so as to be recessed from a top face of the base metal or only a portion of the sintered cubic boron nitride compact that protrudes from a base-metal rake face is ground while the tool is continuously held by the chuck.
    • 本发明提供了一种制造立方氮化硼切割工具的方法,所述立方氮化硼切割工具在贱金属的拐角部分包括贱金属和立方氮化硼烧结体,该方法能够在很大程度上提高中心高度的准确度, 充分减小负斜面的倾斜角或宽度; 和立方氮化硼切割工具。 该方法包括通过将烧结的立方氮化硼压块压靠在研磨机的磨石的端面上来研磨立方氮化硼烧结体,其位置和取向是可控的,以在立方晶烧结体上形成侧面和前刀面 而立方氮化硼切割工具的基底金属由研磨机的卡盘紧紧地保持。 以使立方氮化硼烧结体基本上研磨的方式进行研磨。 在研磨以形成前刀面时,前刀面形成为从贱金属的顶面凹入,或者仅将一个从贱金属前刀面突出的立方氮化硼烧结体的一部分研磨,同时 工具由卡盘连续保持。
    • 70. 发明公开
    • CUBIC BORON NITRIDE SINTERED BODY, AND METHOD FOR PRODUCING SAME
    • 维多利亚州ZER HERSTELLUNG DAVON KUBISCHERBORNITRIDSINTERKÖRPER
    • EP2913317A1
    • 2015-09-02
    • EP13848302.9
    • 2013-10-10
    • Sumitomo Electric Hardmetal Corp.
    • SORAI, YoshiakiOKAMURA, KatsumiFUKAYA, Tomohiro
    • C04B35/583B23B27/14C22C29/16
    • C04B35/5831B22F1/025B22F2999/00B28B1/004C04B35/645C04B2235/3256C04B2235/3839C04B2235/40C04B2235/405C04B2235/72C04B2235/785C04B2235/96C22C26/00C22C2026/003C23C14/165C23C14/223C23C14/34C23C16/00
    • A cubic boron nitride sintered body includes cubic boron nitride, a binder, and a metal catalyst element, a content by percentage of the cubic boron nitride is 50 vol% or more and 85 vol% or less, a content by percentage of the catalyst is 0.5 mass% or more and 5 mass% or less. An image obtained through observation of a 8 µm × 8 µm region of a structure of the cubic boron nitride sintered body with a scanning transmission electron microscope is divided along line segments into partial regions in four rows and four columns, a composition analysis is performed on the line segments, a sum of a detected peak value of nitrogen and a detected peak value of boron at each of arbitrary measurement points on the line segments is calculated, a measurement point at which the sum is a half or less of a maximum value among the sums at all measurement points respectively is identified as a binder-portion measurement point, and a ratio of the number of measurement points at which the catalyst element is not detected among the binder-portion measurement points, to a total number of all binder-portion measurement points, is 30% or less
    • 立方氮化硼烧结体包括立方氮化硼,粘合剂和金属催化剂元素,立方氮化硼的含量为50体积%以上且85体积%以下,催化剂的含量为 0.5质量%以上5质量%以下。 通过用扫描透射电子显微镜观察立方氮化硼烧结体的结构的8μm×8μm区域获得的图像沿着线段被划分成四列和四列的部分区域,对 线段,计算检测到的峰的峰值和在线段上的任意测量点处的检测到的硼峰值之和,将总和为最大值的一半或更小的测量点在 将所有测量点的总和分别确定为粘合剂部分测量点,并且将粘合剂部分测量点中未检测到催化剂元素的测量点的数量与所有粘合剂部分测量点的总数之比, 部分测量点为30%以下