| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a boride compact sintered by using a binder, which has wear resistance, resistance to defects, or the like, required for cutting steel subjected to heat processing, or the like, and allows the cost for processing steel or the like to be reduced. <P>SOLUTION: The boride sintered compact contains a boride comprising Al, one element M selected from elements of groups Ia and IIa of the Periodic Table and boron. The boride sintered compact is composed of 50 to 75 vol.% boride expressed by the compositional formula: AlX≤<SB>1</SB>M<SB>y</SB>≤<SB>1</SB>BZ≥<SB>12</SB>and the remainder being a binding phase and unavoidable impurities. The binding phase is composed of (1) at least one or a mixture of a boride and a nitride of Al and (2) one kind selected from carbides, nitrides, carbonitrides and borides of metals of groups IVa, Va and VIa or a mixture or a solid solution compound of them. In the structure of the sintered compact, particles of the boride expressed by the formula: AlX≤<SB>1</SB>M<SB>y</SB>≤<SB>1</SB>BZ≥<SB>12</SB>are mutually bonded through the binding phase. <P>COPYRIGHT: (C)2003,JPO |
