| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cubic BN ultra-high pressure sintered compact which is most suitable for high-speed cutting or intermittent cutting of high hardness steel such as carburized material or hardened material of steel; and a method for producing the same. <P>SOLUTION: The cubic BN ultra-high pressure sintered compact comprises 30-80 vol% of cubic BN and the balance composed of a binding phase, formed of at least one kind selected from carbides, nitrides, borides and oxides of group 4a, 5a and 6a elements of the periodic table, nitrides and oxides of Al, and carbides and nitrides of Si, and mutual solid solutions thereof, and inevitable impurities. The binding phase contains (1) at least one kind of complex compound of complex nitrides and complex carbonitrides containing at least one of Zr and Hf and Ti, (2) a complex boride containing at least one of Zr and Hf and Ti, (3) AlN, and (4) Al<SB>2</SB>O<SB>3</SB>. <P>COPYRIGHT: (C)2007,JPO&INPIT |
