04593776 is referenced by 73 patents and cites 25 patents.

A cladding process is disclosed wherein hard carbide cutter inserts, as well as polycrystalline diamond composites, are metallurgically bonded into an exterior core of a rock bit cone or a drag bit body. The cladding is bonded onto the exterior surface of the core of the cone or the drag bit by a powder metallurgy process. A thin layer or coating of a suitable metal, preferably nickel, is provided on, for example, the carbide inserts, prior to mounting into the core. The coating prevents degradation of the carbide through loss of carbon into the core during the powder metallurgy process and accommodates mismatch of thermal expansion between the cutter insert and the core.

Title
Rock bits having metallurgically bonded cutter inserts
Application Number
544923
Publication Number
4593776
Application Date
June 14, 1985
Publication Date
June 10, 1986
Inventor
Karl O Kuhn
Laguna Niguel
CA, US
Gunes M Ecer
Irvine
CA, US
William J Salesky
Huntington Beach
CA, US
Agent
Gabor L Szekeres
Assignee
Smith International
CA, US
IPC
E21B 10/08
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