Experimental Study on the Self-Sharpening Property of PDC

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. At the same time the average rate of penetration (v) and average rate of change in ROP () can describe the self-sharpening property of PDC. From the analyses, it is thought that different sloughing forms of polycrystalline layers are microscopic evidence for different self-sharpening of PDC. From macroscopic view, the self-sharpening of PDC depends on the mutually interdependent relation of double layers on wear resistance.