PARTICLE-MATRIX COMPOSITE DRILL BITS WITH HARDFACING AND METHODS OF MANUFACTURING AND REPAIRING SUCH DRILL BITS USING HARDFACING MATERIALS

摘要

A rotary drill bit includes a bit body substantially formed of a particle-matrix composite material having an exterior surface and an abrasive wear-resistant material disposed on at least a portion of the exterior surface of the bit body. Methods for applying an abrasive wear-resistant material to a surface of a drill bit are also provided.