振荡频率对TC4合金激光氮化组织形貌的影响及其数值模拟

doi:10.11896/cldb.24110162

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Abstract Circular oscillation scanning technology can enhance the quality of the nitriding layer, but the thermodynamics of the molten pool still require further investigation. In this work, a combination of experimental and numerical simulation methods was employed to explore the relationship between oscillation frequency and the formation of the nitriding layer microstructure. A numerical model that accounts for heat transfer was used to simulate the dynamic behavior of the molten pool temperature field and the thermal cycling process. The results show that circular oscillation laser reduces the peak temperature and temperature gradient in the molten pool. As the oscillation frequency increases, the temperature field distribution in the molten pool tends to form a "W" shape, leading to a more uniform temperature field distribution. Concurrently, with the increase of oscillation frequency, the distribution of nitrides also becomes more uniform. These indicate that oscillating laser technology improves the non-uniform nitriding and the lack of nitriding area in conventional non-oscillating laser nitriding by altering the temperature field distribution during the laser nitriding process.

Key words： laser nitriding TC4 alloy circular osillating scanning temperature field microstructure

Published: 10 December 2025 Online: 2025-12-03

CLC number:

TB31

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	Articles by authors
	LUO Jianhan
	TIAN Xiaodong
	WANGMIAO Mingyue

Cite this article:

LUO Jianhan,TIAN Xiaodong,WANGMIAO Mingyue. Experimental and Numerical Study on the Effect of Oscillation Frequency on the Morphology and Microstructure of TC4 Alloy in Laser Nitriding[J]. Materials Reports, 2025, 39(23): 24110162-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24110162 OR https://www.mater-rep.com/EN/Y2025/V39/I23/24110162

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