SHE Kun, LI Donghui, YUAN Yuxue, et al.Study on the Influence of Active Flux on the Dynamic Behavior of Molten Pool During Laser Welding[J].Electric Welding Machine, 2023, 53(9): 108-115.
SHE Kun, LI Donghui, YUAN Yuxue, et al.Study on the Influence of Active Flux on the Dynamic Behavior of Molten Pool During Laser Welding[J].Electric Welding Machine, 2023, 53(9): 108-115. DOI: 10.7512/j.issn.1001-2303.2023.09.14.
Study on the Influence of Active Flux on the Dynamic Behavior of Molten Pool During Laser Welding
In order to clarify the action mechanism of active flux on the molten pool during laser welding of aluminum alloys, a mathematical model of the molten pool with a three-dimensional transient moving heat source was established. The influence of surface tension gradient and laser absorptivity on the temperature field and flow field was studied, so as to reveal the enhancement mechanism of penetration depth under the action of active flux. The results showed that the simulated weld morphology was consistent with the actual test results without active flux. In low-power active laser welding of aluminum alloys, although the addition of active flux changed the surface tension gradient, the change of surface tension gradient had no obvious effect on the increase of penetration depth. The analysis showed that the main reason for the increase of penetration depth was the increase of laser absorption rate with the addition of active flux.
关键词
活性剂激光焊铝合金熔池动态行为作用机理
Keywords
active fluxlaser weldingaluminum alloysdynamic behavior of molten poolinfluence mechanism
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