Study on micro-hole morphology of Ni-based superalloy optimized by pulse-delay dynamic modulation of nanosecond laser

Xuecheng Gao; Shufeng Sun; Jin Wang; Fengyun Zhang; Yaofei Ma; Tao Wei; Junbao Li; Pingping Wang

doi:10.63313/AERpc.9048

Authors

Xuecheng Gao Discipline Innovation and Wisdom Introduction Base of High-end Laser Intelligent Manufacturing Technology and Equipment, school of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China Author
Shufeng Sun Discipline Innovation and Wisdom Introduction Base of High-end Laser Intelligent Manufacturing Technology and Equipment, school of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China Author
Jin Wang Discipline Innovation and Wisdom Introduction Base of High-end Laser Intelligent Manufacturing Technology and Equipment, school of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China Author
Fengyun Zhang Discipline Innovation and Wisdom Introduction Base of High-end Laser Intelligent Manufacturing Technology and Equipment, school of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China Author
Yaofei Ma Discipline Innovation and Wisdom Introduction Base of High-end Laser Intelligent Manufacturing Technology and Equipment, school of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China Author
Tao Wei Discipline Innovation and Wisdom Introduction Base of High-end Laser Intelligent Manufacturing Technology and Equipment, school of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China Author
Junbao Li Discipline Innovation and Wisdom Introduction Base of High-end Laser Intelligent Manufacturing Technology and Equipment, school of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China Author
Pingping Wang Discipline Innovation and Wisdom Introduction Base of High-end Laser Intelligent Manufacturing Technology and Equipment, school of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China Author

DOI:

https://doi.org/10.63313/AERpc.9048

Keywords:

Nanosecond laser, Laser drilling, Pulse delay, Ni-based superalloy

Abstract

Ni-based superalloys are widely used in aerospace for their excellent high-temperature properties.. To address thermal damage and dimensional ac-curacy issues faced by IN718 in high-power nanosecond laser micro-drilling, this study proposes a pulse-time modulation strategy. By dynamically control-ling heat accumulation through precise pulse-delay adjustments, a segmented energy delivery mechanism enhances through-hole quality. Two pulse-delay op-timization strategies are proposed and verified in comparison with the conven-tional processing: the optimized hole size accuracy is improved by 70%, the av-erage roughness of the hole wall is reduced by 30%, and the taper of the through-hole is reduced by 54%.

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