Steel tooth bit with a bi-metallic gage hardfacing

An improved earth-boring bit comprising:

• a bit body;
• at least one earth disintegrating cutter, generally conically shaped, rotatably secured to the bit body, the cutter having a plurality of teeth integrally formed thereon, each of the teeth including ends, flanks, and a crest connecting the ends and flanks;
• an outermost row of teeth defining a heel row to disintegrate earth at the corner of the borehole, the outer ends of the teeth forming a conical, gage surface that engages the wall of the borehole;
• the crest of at least one of the heel row teeth defining a corner with an associated gage surface to engage the corner of the borehole;
• a first hardfacing composition of carbide particles dispersed in a metallic matrix deposited on the gage surface of said at least one of the heel row teeth, a substantial portion of the particles of this composition characterized by a high level of abrasion resistance and a lower level of fracture resistance;
• a second hardfacing composition of carbide particles dispersed in a metallic matrix deposited over at least the crest and an upper portion of a selected distance down the gage surface adjacent the crest that tends to round during drilling, a substantial portion of the particles of this composition characterized by a high level of fracture resistance and a lower level of abrasion resistance.