钛合金粉末热复合磁脉冲压制试验研究

Research on titanium alloy powder compact prepared by magnetic pulse compaction and heating

采用热复合磁脉冲成形方法对钛合金(牌号为TC4)粉末进行了成形试验研究。通过压坯平均致密度和光学金相分析,揭示了加热温度、放电电压和复压次数等成形条件对TC4粉末热复合磁脉冲成形压坯致密度的影响规律。结果表明,压坯致密度不随温度升高而线性增加,300℃时的致密度最高。在给定放电能量和300℃下,压坯致密度随电压和复压次数的增加而提高。

A series of experiments were performed to compact titanium alloy （TC4） powder through magnetic pulse compaction and heating. Effects of the compacting conditions, such as heating-up temperature, discharge voltage and repressing times, on the relative density of TC4 powder compact prepared by magnetic pulse compaction and heating were investigated through the average relative density and optical metallographic analysis. The results show that the relative densities of compacts do not linearly increase with the temperature and its value reaches the maximum at 300℃ . With the discharge energy kept constant and at 300℃ , the increase of the discharge voltage enhances the relative density, which can be improved prominently with repressing times.