CHEMICAL INTERACTIONS AT DRILL BITS DIAMOND TOOLS PRODUCTION STUDY

Abstract

The study of chemical interactions between the components of the three types of bundles with different chemical compositions based on Co, Fe (V-21), as well as copper and nickel (B-13) in the process of manufacturing a diamond tools by hot pressing. Found that the pressure intensifies the chemical interaction of the basic components of ligaments Co and B-13 with a diamond. Observed active dissolution of diamond in cobalt and inter- action with the solid solution based on α-Fe to form iron carbides Fe3C (B-13). In the contact-bond diamond is the active chemical interaction leads to embrittlement and cracking ligament in the manufacture of chips. The addition of diamond powder AM 14/10 to a bunch of V-21 and sintering at 860 °C for 9 min does not change the parameters of a solid solution of iron-based, that is, chemical interaction bunch-diamond is much slower and brittle contact zone ligament-diamond happens.