Drill bits comprising dual-phase tungsten carbide material

Details Drill bits comprising dual-phase tungsten carbide material Drill bits comprising dual-phase tungsten carbide material

2009-04-09

2010-10-12

Le, H. (Holly) T (Department: 1787)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

C428S328000, C428S403000

Reexamination Certificate

active

07810587

ABSTRACT:
The invention relates to a drill bit containing tungsten carbide powder having powder particles which have a core of cast tungsten carbide and a shell of tungsten monocarbide.

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Nayak B B: “Enhancement in the microhardness of arc plasma melted tungsten carbide” Journal of Materials Science Kluwer Academic Publishers USA, vol. 38, No. 12, Jun. 15, 2003, p. 2717-2721, XP002318190 ISSN: 022-2461.

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