实验研究了YAG激光诱导放电(LGD)表面离散强化形貌,包括强化点的表面形貌和横截面形貌。利用放电过程中的电弧压力,对强化点表面进行造型。大电流、倾斜放电容易将熔凝物吹起形成凹坑和突起,表面起伏更加明显,而小电流、垂直放电则能得到平坦的表面,有利于增大强化深度。随脉冲宽度的增加,强化点的径深比逐渐变小,在相同强化深度下,小电流、长脉冲宽度可以获得小径深比、厚深状的强化点,而大电流、短脉冲宽度可以获得大径深比、扁平状的强化点。在现有实验条件下,在电流150 A,脉冲宽度9.83 ms下得到最大强化深度为0.479 mm,径深比为3.9。 The discrete surface morphology of YAG laser-induced discharge (LGD) was experimentally studied, including the surface morphology and cross-sectional morphology of the enhancement spots. Use of the discharge arc voltage during the process of strengthening the surface of the point shape. High current, oblique discharge easily blown the formation of pits and bumps, surface undulation more obvious, and small current, vertical discharge can be a flat surface, is conducive to increasing the depth of reinforcement. With the increase of pulse width, the depth-to-depth ratio of the strengthening point becomes smaller. At the same strengthening depth, the small current and long pulse width can obtain the smaller diameter and the deeper and thicker strengthening point, while the larger current and shorter pulse width can be obtained Larger than the deep, flattened point of enhancement. Under the existing experimental conditions, the maximum depth of reinforcement was 0.479 mm at a current of 150 A and a pulse width of 9.83 ms, with a ratio of depth to depth of 3.9.