电镀镍-铁金刚石钻头配方与工艺研究

Study on the formula and technology of electroplated nickel-iron diamond bit

国内采用镍-铁合金作为电镀金刚石钻头的胎体材料仍处于试验研究中。本文详细介绍了镍-铁合金镀液的主要成分及其作用,试验分析了电镀工艺对镀层质量的影响,采用正交回归试验设计方法对胎体成分与性能间的变化规律进行了试验研究。结果表明镍-铁合金镀层是电镀金刚石钻头的较理想的胎体材料。通过调整镀液成分及其含量和改变工艺参数,可以获得不同硬度与耐磨性的镍-铁镀层,可以满足电镀金刚石钻头的要求。依据研究结果试制了2个钻头,进行了室内实钻试验,在8~9级正长花岗岩中钻进,平均时效达到1.87 m/h,钻头平均寿命达到45.9 m,取得了较好的钻进效果。

The applicability of nickel-iron alloy as the matrix material of electroplated diamond bit is still an ongoing research. The essential compositions and their functions of the nickel-iron-plating bath are demonstrated in this paper. The effect of electroplating technology on coating quality was investigated through experiments as well. Orthogonal regression method was used in designing the experiments to study the variation law between matrix compositions and matrix performances. The results indicate that the nickel-iron alloy deposit is an ideal choice as the matrix material of eleetroplated diamond bit. Different kinds of nickel-iron coatings with different matrix hardness and wear resistance can be obtained by adjusting the formula of the plating solution and the technological parameters, which satisfies the requirements of the electroplated diamond bit. Two diamond bits were made using the proposed electroplating bath and were tested in indoor experiments for drilling the syenite-granite ranked 8 -9. The average drilling speed is 1.87 m/h and the average service life is 45.9 m.