EARTH-BORING TOOLS AND METHODS OF FORMING TOOLS INCLUDING HARD PARTICLES IN A BINDER

摘要

Binder compositions for use in forming a bit body of an earth-boring bit include at least one of cobalt, nickel, and iron, and at least one melting point-reducing constituent selected from at least one of a transition metal carbide up to 60 weight percent, a transition metal boride up to 60 weight percent, and a transition metal silicide up to 60 weight percent, wherein the weight percentages are based on the total weight of the binder. Earth-boring bit bodies include a cemented tungsten carbide material comprising tungsten carbide and a metallic binder, wherein the tungsten carbide comprises greater than 75 volume percent of the cemented tungsten carbide material.

主权项

1. An earth-boring tool, comprising:
a body comprising hard particles in a binder material, the hard particles comprising at least one material selected from the group consisting of a transition metal carbide, a transition metal nitride, a transition metal boride, and a transition metal silicide, the binder material comprising a eutectic or near-eutectic composition.