Parametric study of the three-beam laser inside coaxial wire feeding additive manufacturing
Parametric study of the three-beam laser inside coaxial wire feeding additive manufacturing
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DOI：
10.1007/s00170-022-10144-z
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发表时间：
2022-09
期刊：
影响因子：
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通讯作者：
F. Liu;Shaopeng Ji;Tuo Shi;Le Wan;S. Shi;G. Fu
中科院分区：
文献类型：
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作者：
F. Liu;Shaopeng Ji;Tuo Shi;Le Wan;S. Shi;G. Fu
In this study, three-beam laser inside coaxial wire feeding cladding is performed for the parametric study. A 2-kW continuous fiber laser is coupled with the three-beam laser coaxial wire cladding head. The relationship between process parameters, including laser power (1.3–1.5 kW), laser scanning speed (6–8 mm/s), and wire feeding speed (22–24 mm/s), and the clad geometrical characteristics (clad width and height) were explored using DOE method and analysis of variance (ANOVA). The microstructure and microhardness were investigated. The grain size from the bottom to the top of the cladding gradually decreased, and the corresponding microhardness gradually increased. A lower scanning speed generated a coarser microstructure, leading to lower microhardness. The dripping, smooth, and stubbing clad were classified, and corresponding wire transfer behaviors were captured by the high-speed camera. The calculated height increment (0.31 overlap ratio) and automatic cutting wire method (0.1-s dwelling for 1.35-kW laser) were adopted in multi-layer deposition. The targeted thin wall with dense microstructure and accurate dimensions was deposited at the optimum combination of 1.35 kW laser power, 22.85 mm/s wire feeding speed, and 7.15 mm/s scanning speed.
