Optics and Precision Engineering, Volume. 31, Issue 6, 849(2023)
Femtosecond laser precision machining of fuel injection holes in nickel-based superalloys
Figures & Tables(16)
Fig. 2. Optical path diagram of femtosecond laser planar spiral drilling equipment
Fig. 3. Observation of hole wall morphology and roughness measurement method
Fig. 4. Micro hole morphology prepared by optimized process parameters
Fig. 6. Statistical chart of surface roughness of micro hole sidewall under different process parameters
Fig. 8. Surface roughness of hole wall with or without vertical stripes
Table 1. Chemical composition of GH3044
View tableView in ArticleTable 1. Chemical composition of GH3044
C Cr Ti W Mo Al Fe Ni ≤0.10 25.00 0.50 15.00 ≤1.50 ≤0.50 4.00 Bal.
Table 2. Orthogonal experiment factor level table
View tableView in ArticleTable 2. Orthogonal experiment factor level table
Level Laser power/W Scanning time/ms Amount of feeding/mm Defocus amount/mm Repeat frequency/kHz 1 4 200 0.01 0.8 100 2 8 400 0.02 0.4 200 3 12 800 0.03 0 400 4 16 1 200 0.04 -0.4 600
Table 3. Orthogonal experimental scheme
View tableView in ArticleTable 3. Orthogonal experimental scheme
Serial number Laser power
/W
Scanning time
/ms
Amount of feeding
/mm
Defocus amount
/mm
Repeat frequency
/kHz
1 4 200 0.01 0.8 100 2 4 400 0.02 0.4 200 3 4 800 0.03 0 400 4 4 1 200 0.04 -0.4 600 5 8 200 0.02 0 600 6 8 400 0.01 -0.4 400 7 8 800 0.04 0.8 200 8 8 1 200 0.03 0.4 100 9 12 200 0.03 -0.4 200 10 12 400 0.04 0 100 11 12 800 0.01 0.4 600 12 12 1 200 0.02 0.8 400 13 16 200 0.04 0.4 400 14 16 400 0.03 0.8 600 15 16 800 0.02 -0.4 100 16 16 1 200 0.01 0 200
Table 4. Influence of each process parameter on the inlet hole diameter
View tableView in ArticleTable 4. Influence of each process parameter on the inlet hole diameter
Level average Laser power
/W
Scanning time
/ms
Amount of feeding
/mm
Defocus amount
/mm
Repeat frequency
/kHz
k1 0.367 0.368 0.37 0.439 0.371 k2 0.364 0.364 0.367 0.39 0.37 k3 0.37 0.371 0.372 0.344 0.37 k4 0.378 0.377 0.37 0.306 0.369 Range 0.014 0.013 0.005 0.133 0.002
Table 5. Influence of various process parameters on outlet hole diameter
View tableView in ArticleTable 5. Influence of various process parameters on outlet hole diameter
Level average Laser power
/W
Scanning time
/ms
Amount of feeding
/mm
Defocus amount
/mm
Repeat frequency
/kHz
k1 0.171 0.306 0.321 0.316 0.322 k2 0.294 0.27 0.285 0.292 0.269 k3 0.297 0.251 0.268 0.271 0.264 k4 0.336 0.261 0.215 0.209 0.233 Range 0.155 0.055 0.106 0.107 0.089
Table 6. Effect of each parameter on the taper
View tableView in ArticleTable 6. Effect of each parameter on the taper
Level average Laser power
/W
Scanning time
/ms
Amount of feeding
/mm
Defocus amount
/mm
Repeat frequency
/kHz
k1 3.739 1.173 0.94 2.355 0.943 k2 1.334 1.79 1.579 1.876 1.915 k3 1.399 2.291 1.986 1.385 2.025 k4 0.992 2.21 2.959 1.848 2.581 Range 2.747 1.118 2.019 0.97 1.638
Table 7. Influence of each parameter on the processing time
View tableView in ArticleTable 7. Influence of each parameter on the processing time
Level average Laser power
/W
Scanning time
/ms
Amount of feeding
/mm
Defocus amount
/mm
Repeat frequency
/kHz
k1 181.5 55 61.25 67 49.25 k2 52.5 52 58.75 60 45.75 k3 46 92 87.25 83 94.25 k4 28 109 100.75 98 118.75 Range 153.5 57 42 38 73
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Xu WANG, Zihao ZHANG, Liqun LI, Yichen HUANG, Fuquan LI, Xiaochao LIN, Shirui YANG, Peng GUO. Femtosecond laser precision machining of fuel injection holes in nickel-based superalloys[J]. Optics and Precision Engineering, 2023, 31(6): 849
Paper Information
Category: Micro/Nano Technology and Fine Mechanics
Received: Aug. 28, 2022
Accepted: --
Published Online: Apr. 4, 2023
The Author Email: LI Liqun (liliqun@hit.edu.cn)
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