Ti对Al-Ti合金与金刚石的润湿性和把持力的影响

本文首先研究了Ti对Al-Ti合金与金刚石润湿性的影响,然后以不同Ti含量的Al-Ti合金为基体,加入金刚石,利用热压烧结制备没有和有金刚石铝基节块.测量了节块的抗弯强度并计算了铝基结合剂对金刚石的把持力.结果表明:随着Ti含量的增加,Al-Ti合金对金刚石的润湿性有明显的改善,所以当Ti含量为5wt;时,没有和含有金刚石的Al-Ti节块的抗弯强度值最高,分别为135 MPa和102.1 MPa;把持力系数最大,达到75.6;.

Effect of Ti on the Wettability and the Holding Force in Diamond/Al-Ti Alloy

The effect of Ti on the wettability in diamond/Al-Ti system was firstly studied in this paper;then, taking Al-Ti with different Ti content as matrix , adding Ti with different content and diamond , the bits without and with diamond were fabricated by a vacuum hot pressing equipment .The flexural strength of bits was measured and the holding force of Al-matrix bonded to diamond was calculated .The results show that with the increasing Ti content , the wettability between Al-Ti alloy and diamond is obviously improved.When the content of Ti is 5wt%, the combined state between Al-Ti alloy and diamond is the best , so the flexural strength values of the bits without and with diamond are both the highest and they are 135 MPa and 102 .1 MPa respectively;moreover , the holding force coefficient is also the largest and the value is up to 75 .6%.