The rate of penetration of PDC bits relates closely to its self-sharpening property.This relation can be tested through rig test which is performed with standard PDC test bit.

• 复合片钻头的钻速与其切削齿的自锐性密切相关,钻头台架试验反映了这种内在联系,并用平均钻速((?))和平均钻速变化率((?))等指标对复合片自锐性能进行描述与评价。