物探气动冲旋钻头牙齿纳米复合材料试验研究

针对目前物探气动冲击钻头在工作的过程中，遇到牙齿容易出现磨损和断裂失效的问题。应用纳米复合材料的相关理论和制备技术开展了Al₂O₃/WC-Co纳米/微米复合材料的系列试验研究，采用纳米改性技术，在硬质合金中掺杂纳米Al₂O₃制备出Al₂O₃/WC-Co纳米/微米复合材料，并测试其性能，进行组织结构分析和耐磨性、耐冲击性能等试验研究，结果表明：加入3%的纳米Al₂O₃并添加适量的抑制剂和稀土元素能明显改善Al₂O₃/WC-Co纳米/微米复合材料的组织结构，晶粒明显得到细化；耐磨性和耐冲击性能得到很大提高，较硬质合金YG8提高了7~10倍；为大幅度提高钻头破岩效率，延长钻头使用寿命提供了可能性，能较好地满足石油物探冲旋钻井的需要。

THE TOOTH OF GEOPHYSICAL HAMMER BIT NANOCOMPOSITE EXPERIMENTAL STUDY

In view of the problem the present geophysical prospecting pneumatic hammer drill bit tooth is easy to appear wears and break in the work process. In this article ,a nanometer modified technology is used, by adding nanometer Al₂O₃ in the hard alloy to prepare a Al₂O₃/WC-Co nanometer/micron compound material and test its performance, organizational structure analysis, resistance to wear and bears experimental study are carried on, the result indicates that when 3% nanometerAl₂O₃ is added and the right amount of inhibitor is increased, the rareearth element can obviously improve the organizational structure of Al₂O₃/WC-Co nanometer/micron compound material, the property of YG8 is enhanced by 7～10 times, its overall performance is enhanced, which can greally improve the effevtiveness of rock breaking of bit, prolong the life length of bit, and the need of the petroleum physical prospecting to the well can be satisfied greatly.