Composite cutting element containing cubic boron nitride and method of making the same
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United States of America Patent
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Mar 6, 1990
Grant Date -
N/A
app pub date -
Jul 7, 1989
filing date -
Jul 7, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cutting element of flat shape suitable for use as a drill tip comprises a central abrading blade containing more than 80% vol. CBN sandwiched between two lateral support layers. The lateral layers consist of a refractory metal or alloy selected from the group consisiting of tungsten, titanium and alloys thereof. The compact may particularly have a roof or pentagonal shape. An intermediate transition film may be located between the refractory metal or alloy and the CBN blade.
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