摘要 |
<P>PROBLEM TO BE SOLVED: To provide a boride which is sintered compact sintered with a binder and which is provided with excellent chipping resistance in addition to wear resistance required for cutting heat-treated steel and can reduce the working cost of steel, high hardness cast iron or the like. <P>SOLUTION: The boride sintered compact comprises a boride consisting of Al, one element M selected from the group Ia and IIa elements in the Periodic Table, and boron. The sintered compact comprises 50 to 95 vol.% boride whose composition is expressed by Al<SB>x≤1</SB>M<SB>y≤1</SB>B<SB>z≥12</SB>, and the balance binder phase with inevitable impurities. The binder comprises at least one kind of metal selected from the group VIII metals, an alloy consisting of the above metal and at least one kind selected from the group consisting of the boride of the above metal or alloy. <P>COPYRIGHT: (C)2004,JPO |