Brazing receptacle for improved PCD cutter retention
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United States of America Patent
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-
Apr 14, 1998
Grant Date -
N/A
app pub date -
Jun 4, 1996
filing date -
Jun 4, 1996
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Thin walled metal alloy receptacles are filled with a filler material. If granular, the filler material is solidified in the receptacles. The receptacles are inserted in a bit mold with their open ends abutting against preformed cutter locations in the bit mold. The mold is filled with a steel or tungsten carbide powder and a binder and exposed to temperatures sufficient to cause the binder to infiltrate the steel or tungsten carbide as well as infiltrate the receptacle outer surfaces, metallurgically bonding the receptacles to the binder. The mold is then removed, revealing a bit body with the bonded filled receptacles. The filler material is removed from the receptacles PCD cutters are inserted in the receptacles and are brazed using conventional brazing techniques.
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