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Influences of deposited metal material parameters on weld pool geometry during shield metal arc welding
Ist Teil von
International journal of heat and mass transfer, 2015-11, Vol.90, p.968-978
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2015
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
•The heat and mass transfer with drop short circuit transition process is analyzed.•New parameters to analyze the weld pool evolution quantitatively are proposed.•The effects of material parameters on heat transfer of weld pool are analyzed.•Deposited metals are divided to 3 categories in terms of the weld pool heat transfer.
Weld pool geometry performs an important function in improving weld quality during welding. In the present work, the influences of deposited metal material parameters, including surface tension gradient, magnetic permittivity, and thermal expansion coefficient, on weld pool geometry were investigated. Fusion length (FL) and fusion ratio (FR) were proposed to analyze weld pool evolution quantitatively. Results reveal that surface tension gradient exerts the most significant effects on weld pool geometry. The effects of magnetic permittivity are less extensive than those of surface tension gradient, and thermal expansion coefficient exerts only slight influences on weld pool geometry. Considering the effects of surface tension gradient, magnetic permittivity, and thermal expansion coefficient, a classification method for deposited metals was proposed. Based on the characteristics of the weld pool geometry, heat and mass transfer processes in the weld pool, and application conditions, various types of deposited metals were analyzed. Comparison of the simulated and experimental results showed that the error ranges of FR and FL are 3.66–4.53% and 1.03–2.83%, respectively.