Effect of maceration alloys on the performances of PDC drill bit matrix

Abstract

The wetting ratio of PDC drill bit matrix has a great influence on its mechanical properties and microstructure. To explore the influences of maceration alloys on the performance of PDC drill bit matrix, two kinds of maceration alloys, Cu-Ni-Mn-Zn and Cu-Ni-Mn-Sn, were used to make the working layer and the non-working layer test blocks with different heights. The differences in wetting ratio and mechanical properties between the working layer and the non-working layer of the matrix bit under different maceration alloys were obtained. At the same time, scanning electron microscopy was used to analyze the microstructure and the element content of the blocks. The results show that the wetting ratio of the test block is a constant value. The wetting ratio of the working layer of the bit matrix is smaller than that of the non-working layer. The microstructures show that the island structure of the maceration alloy in the working layer is large and dispersed, while the island structure in the non-working layer is small and dense. For the same type of test block, the higher the wetting ratio, the higher the density. The hardness of the test block obtained by Cu-Ni-Mn-Sn is higher than that of Cu-Ni-Mn-Zn, but its bending strength and impact toughness are much lower than that of Cu-Ni-Mn-Zn.

Keywords

• pdc drill bit matrix
• maceration alloys
• wetting ratio
• mechanical properties
• microstructure