改善钎焊金刚石钻头制造工艺的研究

Research on Improving the Manufacture Technology of Brazed Diamond Bit

摘要:

电阻式真空活化钎焊烧结机钎焊烧结金刚石钻头时，由于镍基钎焊温度较高，钎焊温度超过727 ℃时钻头45钢体开始发生奥氏体反应，在钎焊烧结压力下易变形。为了保持一定的压力以减小接触电阻，满足钎焊烧结温度基本不变的要求，成功地通过增大钻头钢体段的过流面积，减小钢体段的电阻以降低钢体的发热功率和温升，有效地减少钻头钢体的塑性变形。

Abstract:

In processing of manufacturing the brazing diamond bit for vacuum activation brazing-sintering machine, when the temperature exceed 727℃，the bit body of steel 45 will react austenitic reaction and becomes easy to deform under brazing-sintering pressure because of the higher Ni-based brazing temperature. In order to maintain certain pressure to reduce the contact electric resistance and meet the requirements of constant brazing sintering temperature, by increasing the flow area of the bit steel body and reducing the resistance of the steel part to reduce the heating power and the temperature rise of the bit steel body, the plastic deformation of bit body can be effectively reduced.