在激光扫描涂覆Al-Ti-C活化粉料层的铝合金试样过程中,突然停止激光发射,以在激光束前面形成合成反应过程中不同阶段所产生的组织,判断所发生的化学反应,即先发生3Al+Ti→Al3Ti反应,形成块状Al3Ti;以后再发生Al3Ti+C→TiC+3Al反应,形成大量TiC颗粒。将实验与数值模拟相结合,采用试错法求得:3Al+Ti→Al3Ti的反应温度为650℃,Al3Ti+C→TiC+3Al的反应温度为810℃。 During the laser scanning of the aluminum alloy sample coated with the Al-Ti-C activated powder layer, the laser emission was abruptly stopped so that the tissue generated at different stages during the synthesis reaction was formed in front of the laser beam to judge the chemical reaction that took place , That is, 3Al + Ti → Al3Ti reaction occurs first, to form a massive Al3Ti; then occur Al3Ti + C → TiC + 3Al reaction to form a large number of TiC particles. The experimental and numerical simulations were carried out by the trial and error method. The reaction temperature of 3Al + Ti → Al3Ti was 650 ℃, and the reaction temperature of Al3Ti + C → TiC + 3Al was 810 ℃.