| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a boride sintered compact which is sintered by using a binder, is provided with wear resistance required, e.g. for cutting heat-treated steel, and can reduce the working cost of steel or the like. <P>SOLUTION: The boride sintered compact contains Al, one element M selected from the groups Ia and IIa in the Periodic Table, and borides consisting of boron. The boride sintered compact has a composition consisting of 50 to 75 vol.% borides expressed by AlX<SB>1</SB>M<SB>y</SB><SB>1</SB>BZ<SB>12</SB>, and the balance bonding phase with inevitable impurities. The bonding phase consists of at least one kind selected from the carbides, nitrides, carbonitrides and borides of the group IVa, Va and VIa metals or a compound of their solid solutions. The borides expressed by AlX<SB>1</SB>M<SB>y</SB><SB>1</SB>BZ<SB>12</SB>are mutually joined via the above bonding phase in the structure of the sintered compact. <P>COPYRIGHT: (C)2003,JPO |
