HIGH-HARDNESS MACHINING CUTTING TOOL MADE OF CUBIC BORON NITRIDE GROUP CERAMICS HAVING EXCELLENT BRAZING BONDING STRENGTH, AND Ag ALLOY BRAZING MAERIAL TO BE USED FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a high-hardness machining cutting tool made of cubic boron nitride group ceramics having excellent brazing bonding strength and abrasion resistance and hardly dropping a brazed part even under the hard cutting condition, and also to provide an Ag alloy brazing material to be used for the cutting tool.;SOLUTION: A cutting blade tip 2 made of cubic boron nitride group ceramics is brazed to an alloy tip 3 made of tungsten carbide group hard metal by using the Ag alloy brazing material. The Ag alloy brazing material comprises Cu of 10-30%, Ti of 2-10% and Ni of 1-4% in mass%, and the residual part comprises Ag and unavoidable impurity.;COPYRIGHT: (C)2008,JPO&INPIT