High power water jet guided laser drilling of angular holes through nickel superalloy
High power water jet guided laser drilling of angular holes through nickel superalloy
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DOI：
10.1016/j.procir.2022.08.118
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
H. Elkington;S. Marimuthu;Bethan Smith
中科院分区：
文献类型：
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作者：
H. Elkington;S. Marimuthu;Bethan Smith
本文研究了水射流导向激光打孔工艺的基本特性，采用最大平均功率为400 W的高功率激光器，在1.6mm厚的镍基高温合金上钻制出直径为0.7mm（与表面成60°）的角孔（孔长为1.85mm）。使用高达148 W的平均功率进行实验性试验，以了解不同工艺参数对孔质量和循环时间的影响。研究的工艺参数包括保护气体流速、水射流压力、开孔速度、脉冲频率和平均功率。结果表明，水射流压力和平均功率对控制重铸层厚度和钻进周期有重要意义。在更高的功率和产量下，平均重铸层厚度可以在3秒的循环时间内获得约30 μm。这超过了孔的质量，可以通过最先进的激光钻孔技术生产，而不会显着降低生产率。
This paper investigates the basic characteristics of water jet guided laser drilling process using a high power laser with a maximum average power of 400 W to drill 0.7 mm diameter angular holes (60° to the surface) through 1.6 mm thick nickel superalloy (resultant hole length of 1.85 mm). Experimental trials were performed using average powers of up to 148 W to understand the effect of different process parameters on the hole quality and cycle time. Process parameters investigated included shielding gas flow rate, water jet pressure, trepanning speed, pulse frequency, and average power. The results found water jet pressure and average power to be significant in controlling the recast layer thickness and drilling cycle time. At higher power and throughput, average recast layer thicknesses of ∼30 μm could be obtained with a cycle time of 3 seconds. This surpasses the quality of holes, which can be produced via state-of-the-art laser drilling techniques without a significant reduction in productivity.