04372404 is referenced by 50 patents and cites 8 patents.

Cutting teeth for rolling cutter bits, including cutter inserts, cutter teeth formed in place, or formed separately and welded in place, etc., are formed by powder metallurgy as a densified powder metallurgical composite of at least two varying phases, said composite having a substantially continuous mechanical property gradient therethrough. One of said phases is preferably a refractory compound and another phase is a binder metal or alloy. The gradient is from one mixture of said phases in one region having hardness or wear resistant properties to another mixture of said phases in another region having toughness properties.

Title
Cutting teeth for rolling cutter drill bit
Application Number
6/185691
Publication Number
4372404
Application Date
September 10, 1980
Publication Date
February 8, 1983
Inventor
Eric F Drake
Pearland
TX, US
Agent
Michael J Caddell
Assignee
Reed Rock Bit Company
TX, US
IPC
E21B 10/46
E21B 10/08
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