纳米材料改善孕镶金刚石钻头胎体性能研究

发布时间：2018-05-05 04:28

  本文选题：纳米材料 + 纳米镍　； 参考：《吉林大学》2015年硕士论文

【摘要】：为提高孕镶金刚石钻头胎体的综合性能，，优选胎体配方材料是很好的解决方法。本研究在钻头胎体中加入适量纳米材料，通过对制备试样的硬度、抗弯强度和耐磨性测试及断口微观特征分析，综合评价该方法的可行性。结果表明：纳米镍粉的加入均可降低WC基和Fe基钻头胎体的烧结温度，硬度、强度和耐磨性均有不同程度的提高。同时，以降低胎体烧结温度为出发点，优化出其最佳的烧结温度和纳米镍粉的最佳含量：对于WC基胎体，纳米镍的含量为2.5%，烧结温度为880℃时，胎体与金刚石的接触界面最紧密；对于Fe基胎体，纳米镍的含量为1%，烧结温度为870℃时，胎体与金刚石的接触界面最紧密；对于WC基胎体，碳纳米管的加入量为0.075%时，WC基胎体材料的抗弯强度和耐磨性综合性能最佳，粘结剂对骨架材料的包镶能力最好。 通过室内微钻试验，进一步得出了纳米材料钻头的机械钻速和耐磨性均得到了一定的提高。含有纳米镍的WC基胎体钻头的机械钻速较无纳米镍的提高5.8%，钻头耐磨性提高1.4%。含有纳米镍的Fe基胎体钻头的机械钻速较无纳米镍的提高12.3%，钻头耐磨性提高14.5%。含有碳纳米管的WC基胎体钻头的机械钻速较无纳米镍的提高16.3%，钻头耐磨性提高26.4%。
[Abstract]:In order to improve the comprehensive performance of impregnated diamond bit matrix, the optimum selection of matrix material is a good solution. In this study, the feasibility of the method was comprehensively evaluated by adding proper amount of nano-materials to the matrix of the bit. The hardness, bending strength and wear resistance of the prepared samples were tested, and the microcosmic characteristics of the fracture surface were analyzed. The results show that the sintering temperature, hardness, strength and wear resistance of the matrix of WC and Fe based bit can be decreased by the addition of nano nickel powder. At the same time, in order to reduce the sintering temperature of the matrix, the optimum sintering temperature and the best content of nano-nickel powder are optimized. For WC matrix matrix, the content of nano-nickel is 2.5 and the sintering temperature is 880 鈩

本文编号：1846212