Effect of Composite Electroplating Strengthened Diamond Particles on the Performance of Bit

Abstract

To enhance the rock-crushing efficiency and drilling life of impregnated diamond drill bits，a strategy was proposed for the localized heterogenization of the drill bit matrix through composite electroplating reinforcement of diamond particles，separating the protrusion effect of diamonds in the drill bit matrix from their encapsulation strength.Diamond particles were strengthened by electroless plating and composite electroplating.Subsequently，the diamond drill head body was prepared through hot pressing sintering.Studies were conducted on the performance changes of the composite electroplating strengthened diamond particles，the friction and wear characteristics of the drill head body，and the protrusion state and binding interface of the diamonds within the drill head body.Results showed that a modified metal coating was obtained on the surface of diamond particles strengthened by composite electroplating.The morphology of the coating was dense and uniform，with good bonding with diamond.The composite electroplating strengthened diamond particles effectively improved the surface wettability and impact resistance of diamond.The heterogeneous matrix structure ensured the slow protrusion process and the protrusion height of the diamond.The composite electroplating strengthened diamond particles effectively improved the comprehensive performance of the diamond bit.

Keywords

• electroless plating|composite electroplating|diamond|bit matrix|performance