CUTTING TOOL MADE OF DIAMOND-BASED EXTRA-HIGH PRESSURE SINTERED MATERIAL EXCELLENT IN WEAR RESISTANCE AND FRACTURE RESISTANCE

摘要

PURPOSE: To enhance wear resistance and fracture resistance by including both the carbonate of Cu, Zn, Ag, In, Pb, and Bi, and the carbonate of Cr, Fe, Ni, Co, and Mn in a prescribed volume ratio. ;CONSTITUTION: The wear resistance and fracture resistance of a cutting edge is further enhanced by coexistingly including both the carbonate of Cu, Zn, Ag, In, Pb, and Bi and the carbonate of Cr, Fe, Ni, Co, and Mn. The content of this carbonte of Cu, Zn, Ag, In, Pb, and Bi is made to be 1 to 5vol.%. Further, the content of the carbonate of Cr, Fe, Ni, Co, and Mn is made to be 1 to 20vol.%. When it is less than 1vol.%, the mutual binding acceleration of diamond powders at the time of sintering is not sufficiently promoted. A desired cutting tool can be formed by the diamond group extra-high pressure sintered material having a composition consisting of a prescribed vol.% of these carbonates and the remainder of diamond which substantially forms the base.;COPYRIGHT: (C)1995,JPO