Kennametal Inc.

Novem Car Interior Design Metalltechnologie Gmbh

Michael Wilfert

Debangshu Banerjee

Xin Deng

Rainer Fick

Wolfram Weiskopf

The present invention includes a matrix powder system comprising one or more polycrystalline carbides, binderless carbides, or a combination thereof, a composite comprising the matrix powder system and a metal bond phase, a matrix bit body for a drill bit for oil and gas drilling made of this composite material, and a drill bit for oil and gas drilling comprising the matrix bit body and at least one cutter. The polycrystalline and/or binderless carbides may comprise carbides of W, Ti, V, Cr, Nb, Mo, Ta, Hf, Zr, or a combination thereof. The binderless carbides have less than 3 wt. % binder and the binderless and/or polycrystalline carbides may have a grain size of &#x2266;15 &#x3bc;m and a hardness of &#x2267;1900 HV (0.5 kgf). Additional ceramic components and/or metals may also be present in the matrix powder system. Alternatively, the composite material may be present on only a portion of the matrix bit body surface.

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Mistelgau, Germany

Michael Wilfert