| 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
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