论文部分内容阅读
当激光束以极快的速度在金属表面扫描之后,使工件表面产生一层极簿(1—10微米)的熔化层,而基体仍保持原来的冷状态。如此大的温度梯度,促使熔化层以极高的速度冷凝(10℃/秒以上),因
When the laser beam is scanned at a very fast rate on a metal surface, a very thin layer (1-10 microns) of melted layer is created on the surface of the workpiece while the substrate remains in its original cold state. Such a large temperature gradient causes the melt layer to condense at an extremely high rate (10 ° C / s or more)