GH4169镍基高温合金的飞秒激光制孔性能研究

doi:10.11896/cldb.24020029

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Abstract In order to improve the drilling quality of femtosecond laser processing nickel-based superalloy materials and optimize the drilling laser processing parameters, drilling experiments were carried out. Using femtosecond laser processing test platform, under different processing parameters (single-layer feed rate, laser power) setting different parameter levels, the hole machining of nickel-based superalloy plate with thickness of 1 mm was carried out, at the same time, the cross-section morphology of the hole processed by EDM and femtosecond laser was compared. The results show that the number of penetrating layers decreases with the increase of laser processing power and single layer feed rate. The size of the entrance aperture and the exit aperture increases with the increase of the laser power, and decreases with the increase of the single-layer feed rate. The hole taper decreases first and then increases with the increase of the laser power and the single-layer feed rate, when the single-layer feed rate is 15 μm, the overall taper of the hole is small, and the minimum taper is 2.3 °. The roughness of the exit region is generally larger than that of the entrance, and the periodic columnar structure is formed in the exit region. Serious internal defects such as recast layer and irregular microcracks are produced in the inner wall of small holes machined by EDM. However, there are no defects such as remelting layer, intergranular corrosion, heat affected zone and cracks in the inner wall of femtosecond laser processing, forming the inner wall morphology of nano-stripe structure, and the processing quality is good. Under the condition of fixed spot shape and wavelength, the optimal drilling quality of nickel-based superalloy plate with 1 mm thickness can be obtained when the laser power is 14 W and the single-layer feed rate is 15 μm.

Key words： nickel base superalloy femtosecond laser processing electrical discharge machining film hole surface quality laser drilling

Published: 10 May 2025 Online: 2025-04-28

CLC number:

TN249

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	Articles by authors
	CHEN Taili
	NIU Fan
	XU Lianghui
	CHEN Xinyue
	HOU Xiaowei
	SUN Jiang
	SI Yan
	FANG Xiuyang
	CAI Zhenbing

Cite this article:

CHEN Taili,NIU Fan,XU Lianghui, et al. Femtosecond Laser Drilling Performance of GH4169 Nickel-based Superalloy[J]. Materials Reports, 2025, 39(9): 24020029-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24020029 OR https://www.mater-rep.com/EN/Y2025/V39/I9/24020029

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