Progress in Numerical Simulation of Thermal Processes and Weld Pool Behaviors in Fusion Welding

doi:10.3901/JME.2018.02.001

Abstract

Abstract: The fusion welding processes are extensively used material joining processes in manufacturing industry. The thermal physics and weld pool behaviors in fusion welding have decisive influence on the weld bead quality, the microstructure and service performance of the joints. Accurate analysis and calculation of thermal processes and weld pool behaviors are of great significance to the welding metallurgy analysis, stress & deformation analysis, process control and process optimization etc. Numerical simulation is also a necessary way to turn welding from qualitative description & experience-based art into quantitative analysis-& and science-based engineering branch. The state-of-art and existing problems of numerical simulation for arc physics, droplet transfer behavior, high-speed weld bead defect formation, keyhole dynamics and weld pool behaviors of plasma arc welding, laser welding and laser-arc hybrid welding are reviewed, and the trend in this field is also discussed, aiming at providing a fundamental guideline for the fusion welding process optimization and control.

Key words: fusion welding, heat transfer and fluid flow, numerical simulation, research progress, weld pool behavior

CLC Number:

TG402

WU Chuansong, MENG Xiangmeng, CHEN Ji, QIN Guoliang. Progress in Numerical Simulation of Thermal Processes and Weld Pool Behaviors in Fusion Welding[J]. Journal of Mechanical Engineering, 2018, 54(2): 1-15.

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