SUPPORTED PCD/PCBN TOOL WITH ARCHED INTERMEDIATE LAYER AND METHOD

摘要

PURPOSE: A multi-crystalline tool is provided to be strong against deterioration or destruction in a high temperature condition and to contain developed fine structure inside a multi crystalline molded body. CONSTITUTION: A multi crystalline processing ingredient(130) includes general tungsten carbide or a support portion(134) formed of similar material. The support portion does not have a planar upper surface(multi-crystalline substance adhered surface) and thus the support portion contains a creased surface having plural convex portions offset by plural concave portions similar to an instrument chopping meat. Furthermore, a processing portion(130) contains a multi-crystalline molded body(138) defining an outer processing layer(140). The multi-crystalline molded body(138) is formed of diamond powder or CBN(cubic boron nitride) powder. Different from the support portion, the multi-crystalline molded body is determined into a different shape while generally having a planar surface. Intermediate the support portion and the multi-crystalline molded body, a middle layer(144) is arranged. In addition, the middle layer is formed in a multi-crystalline substance(PCD(polycrystalline diamond) or PCBN(polycrystalline cubic boron nitride)).