Abstract: 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.
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Key words: hammer bit, nanocompsites, Al₂O₃/WC-Co, the organizational structure, experimental study