NUMERICAL SIMULATION OF WELD FORMATION IN LASER+GMAW HYBRID WELDING,II. Combined Volumetric Distribution Mode of Hybrid Welding Heat Source

Acta Metall Sin

2008, Vol. 44

Issue (6): 641-646 DOI:

Research Articles

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NUMERICAL SIMULATION OF WELD FORMATION IN LASER+GMAW HYBRID WELDING,II. Combined Volumetric Distribution Mode of Hybrid Welding Heat Source

山东大学南校区材料学院连接技术研究所

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. NUMERICAL SIMULATION OF WELD FORMATION IN LASER+GMAW HYBRID WELDING,II. Combined Volumetric Distribution Mode of Hybrid Welding Heat Source. Acta Metall Sin, 2008, 44(6): 641-646 .

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Abstract Based on the geometry characteristics of laser+GMAW-P hybrid welds and the macroscopic mechanism of heat transfer, four new kinds of adaptive combined volumetric heat source modes are developed The arc heat flux, thermal content of overheated droplets, and laser power are described as double-elliptic plane distribution, double-ellipsoid body distribution, and peak value increasing-rotary curve body distribution, respectively. To apply the developed adaptive combined volumetric heat source modes into numerical analysis of temperature profiles in hybrid welding, the geometry and dimension of hybrid welds are predicted under different conditions. Through comparing the calculated results to the experimental measurements, it is found that both match well. The four kinds of adaptive combined volumetric heat source modes fully consider the process features of hybrid welding, can numerically simulate the weld geometry and dimension accurately, and reflect quantitatively the varying regularity of temperature profiles in hybrid welding.

Key words: Hybrid welding laser welding GMAW combined volumetric heat source mode weld formation numerical simu

Received: 25 October 2007

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