Process for laser hardfacing drill bit cones having hard cutter

Details Process for laser hardfacing drill bit cones having hard cutter Process for laser hardfacing drill bit cones having hard cutter

1987-08-10

1988-11-01

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148152, 148903, 148905, C21D 922

Patent

active

047817704

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

REFERENCES:
patent: 3158214 (1964-11-01), Wisler et al.
patent: 3989554 (1976-11-01), Wisler
patent: 4015100 (1977-03-01), Gnanamuthu et al.
patent: 4303137 (1981-12-01), Fischer

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