关键词: 水射流引导激光, Inconel 718合金, 沟槽结构, 激光能量密度, 水射流速度

Abstract: In order to explore the laws of manufacturing groove structures on Inconel 718 alloy by WJGL, multiple sets of single factor experiments were designed and carried out on the self-developed WJGL equipment. The effects of water jet velocity and laser energy density on the depth, width and burr size of groove structures were analyzed. The experimental results show that the influence of laser energy density on the size of groove structure is higher than that of water jet velocity. Under the condition of constant nozzle aperture, laser energy density and water jet velocity have little effects on the width of groove structures. A nozzle with an aperture of 0.5 mm is used, when the laser power density is as 40 J/cm2 and the water jet velocity is as 60 m/s, the maximum depth of the groove is as 523 μm. When the laser energy density is as 10 J/cm2, the narrowest width of the groove is as 403 μm. When the laser energy density is as 40 J/cm2, the minimum burr size is as 54 μm.According to the theoretical analysis, the mechanism of WJGL technology to remove Inconel 718 alloy material is to ablate the molten material by laser, and then the molten material is washed away by water jet.

Key words: water jet guided laser(WJGL), Inconel 718 alloy, groove structure, laser energy density, water jet velocity