Abstract: Iron-plating technology for restoration of parts was applied in manufacture of diamond bits in our research. The technology for electroforming diamond bit with iron matrix was mastered based on experiments. The laboratory drilling test indicated that the average penetration rate of the DC-electroplated iron based diamond bit was 2m/h during drilling in granite grade 9 and the bits life reached 44m, which can meet drilling production requirements. The results showed that the DC-electroplated iron based diamond bit has high and adjustable hardness and good diamond exposing ability. The electrolyte formula is relatively simple and its cost is lower. This kind of bit has good application prospect.

Keywords: iron-based matrix      asymmetric AC/DC electroplating       diamond exposure