Cutting teeth for rolling cutter drill bit
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United States of America Patent
Stats
-
Feb 8, 1983
Grant Date -
N/A
app pub date -
Sep 10, 1980
filing date -
Sep 10, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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.
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