SUPERHARD INSERT AND AN EARTH BORING TOOL COMPRISING SAME
First Claim
1. A superhard insert for a rotary earth borer tool, comprising a cutter end having a peripheral cutter edge, at least part of the peripheral cutter edge being defined by a plurality of edges of a plurality of alternate hard and superhard regions, the edges of the superhard regions arranged spaced apart from each other and separated by edges of hard regions;
- the hardness of each hard region being at most 50% of the hardness of each superhard region.
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Abstract
A superhard insert for a rotary earth borer tool comprises a cutter end having a peripheral cutter edge, at least part of the peripheral cutter edge being defined by a plurality of edges of a plurality of alternate hard and superhard regions. The edges of the superhard regions are arranged spaced apart from each other and are separated by edges of hard regions. The hardness of each hard region is at most 50% of the hardness of each superhard region.
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Citations
11 Claims
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1. A superhard insert for a rotary earth borer tool, comprising a cutter end having a peripheral cutter edge, at least part of the peripheral cutter edge being defined by a plurality of edges of a plurality of alternate hard and superhard regions, the edges of the superhard regions arranged spaced apart from each other and separated by edges of hard regions;
- the hardness of each hard region being at most 50% of the hardness of each superhard region.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification