SINTERED CEMENTED CARBIDE BODY AND USE THEREOF

摘要

Sintered cemented carbide bodies are described, comprising at least one hard component and a Co-Ni-Fe binder which comprises about 40 to 90 wt.% cobalt, the remainder of the binder consisting of nickel and iron, apart from incidental impurities, with nickel comprising at least 4 but no more than 36 wt.% of the binder and iron comprising at least 4 but no more than 36 wt.% of the binder, and the binder having a Ni:Fe ratio of about 1.5:1 to 1:1.5. For achieving an improvement in mechanical properties, more particularly toughness and fatigue resistance, of the sintered cemented carbide bodies, it is proposed that the concentration of the binder has a gradient within the cemented carbide body.