| 摘要 |
An improved surface finish for non-planar drill inserts or cutting elements is provided for use on inserts used in the drilling and boring of subterranean rock formations. This new surface finish provides an insert with improved wear characteristics, a decrease in heat generation, a decrease in frictional work loss, and a minimization of failure inducting surface cracks. This invention accomplishes these objectives by a process of polishing the cutting or contact surface of the insert to a very high degree of smoothness.
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