Process for laser hardsurfacing drill bit cones having hard cutter inserts

摘要: A cone blank (120) for a rotary rock bit is forged, rough machined, carburized and heat-treated, followed by the formation of insert holes (146) therein. Inserts (142) are then pressed into holes. The finished subsequently sprayed with hardfacing cladding material (154) in powdered form. powder thereafter densified fused laser source to give hard, erosion-resistant clad layer (155) on outer surface, including immediate vicinity inserts (142).