对Ti?6Al?2Zr?1Mo?1V合金在920～1120℃温度范围进行渗硼处理,研究渗硼条件对渗硼层的影响.结果表明,渗硼层由外部连续薄TiB2层和里层厚TiB层组成,TiB相呈魏氏体状或针状形貌嵌入基体.在渗硼温度为1000～1080℃、渗硼时间超过8 h渗硼时可获得厚而致密的渗硼层.渗硼层厚度随渗硼温度和渗硼时间增加而增加.渗硼层生长动力学曲线呈抛物线特征.建立TiB2和TiB层生长动力学的预测模型,其计算结果与实验数据达到较好吻合.确定TiB2和TiB激活能分别为223.1和246.9 kJ/mol.“,”The influence of the boriding conditions on the boride layers was examined by boriding Ti?6Al?2Zr? 1Mo?1V alloy in the temperature range of 920?1120 ℃. The experimental results show that the boride layers were composed of a continuous thin outer layer of TiB2 and a thick inner layer of TiB with whiskers or needle-like morphologies that extended into the substrate. Thick and compact boride layers were obtained when the boriding temperatures were 1000?1080 ℃, and the treatment time exceeded 8 h. The boride layer depth increased with the boriding temperature and time, and the growth kinetics of the boride layers was characterized by a parabolic curve. The growth kinetics of the boride layers, including both TiB2 and TiB layers, were predicted by establishing a diffusion model, which presented satisfactory consistency with the experimental data. As a result, the activation energies of boron in the TiB2 and TiB layers were estimated to be 223.1 and 246.9 kJ/mol, respectively.