Method and apparatus for fabrication of cobalt alloy composite i

Details Method and apparatus for fabrication of cobalt alloy composite i Method and apparatus for fabrication of cobalt alloy composite i

1998-05-01

2000-05-16

Jenkins, Daniel J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 7, 419 8, 419 9, B22F 706, B22F 708

Patent

active

060633336

ABSTRACT:
This disclosure features a process of making a two part drill bit insert, namely, a body portion of hard particles such as tungsten carbide particles mixed in an alloy binding the particles. The alloy preferably comprises 6% cobalt with amounts up to about 10% permitted. The body is sintered into a solid member, and also joined to a PDC crown covering the end. The crown is essentially free of cobalt. The process sinters the crown and body while preserving the body and crown cobalt differences.

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patent: 5011515 (1991-04-01), Frushour
patent: 5013694 (1991-05-01), Holcombe et al.
patent: 5453225 (1995-09-01), Morrow et al.
patent: 5641921 (1997-06-01), Dennis et al.
patent: 5848348 (1998-12-01), Dennis

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