本文报道了表面处理、钻头应力和金刚石涂层引起的边缘圆角效应对碳化钨钻头在高强度研磨复合材料加工中性能的影响。涂层前，对钻头表面进行除钴处理。在处理和涂层工艺前后，对钻头进行了扫描电子显微镜和x射线衍射。在氧化铝复合材料的钻孔中使用了无涂层和涂层钻头，并在钻孔过程中测量了力和扭矩。钻孔试验表明，涂层工艺导致刀具寿命缩短，刀具发生灾难性故障的原因可能是边缘圆角效应和切削刃附近引入的不规则。

This paper reports the effects of surface preparation, drill stresses, and edge rounding effects due to diamond coating on the performance of tungsten carbide drills in machining of a high strength, abrasive composite. The surface of the drills were treated for cobalt removal prior to coating. Scanning electron microscopy and x-ray diffractions were performed on the drills before and after the treatment and coating processes. Uncoated and coated drills were used in drilling holes in an aluminum oxide composite, and forces and torques were measured during the process. The drilling tests indicated that the coating process resulted in reduced tool life with catastrophic tool failure likely due to edge rounding effects and irregularities being introduced in the vicinity of the cutting edge.