Cutting performance of sintered diamond with MgCO3 as a sintering agent

To elucidate the cutting performance of sintered diamond with MgCO3, we carried out cutting tests on a high-silicon aluminum alloy and cemented carbides. In high speed cutting of the Al-17%Si alloy, sintered diamond with MgCO3 gave a superior wear resistance and a better surface finish than diamond made with Co. Cutting tests done on WC-(6, 12 and 24)%Co alloys show that the cutting performance of sintered diamond with MgCO3 is superior to that of Co. In the case of sintered diamond with MgCo3, the cutting performance is not affected by the Co content of cemented carbides.