| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a composite high-hardness material for tools having a base material consisting of a CBN sintered body containing, by volume, 20% cubic boron nitride, or a base material consisting of a diamond sintered body containing 40% diamond. <P>SOLUTION: At least one hard heat-resistant film mainly consisting of at least one kind of element selected among C, N and O, Ti and Al is deposited on a part related to at least cutting. The ideal composite high-hardness material for tools has both the high hardness and the high strength (several times higher than that of cemented carbide) of the CBN sintered body or the diamond sintered body and the excellent wear resistance of the hard and heat-resistant film, and demonstrates considerably long lifetime compared with a conventional tool when used in cutting of hardened steel, rough turning of cast iron, common grinding of cast iron with aluminum alloy, etc. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
